Mar. 2023, The Mining and Materials Processing Institute of Japan, Best Paper Award　　　　　　　　　　　　　　　
Kinetic analysis for agglomeration-flotation of finely ground chalcopyrite: Comparison of first order kinetic model and experimental results.
V. Hornn, M. Ito, R. Yamazawa, H. Shimada, C.B. Tabelin, S. Jeon, I. Park, N. Hiroyoshi,

Jun. 2021, Japan society of material cycles and waste management, Best Paper Award　　　　　　　　　　　　　　　
The effects of particle geometry on separation efficiency
heerayut Phengsaart;Mayumi Ito;Arisa Azuma;Carlito Baltazar Tabelin;Naoki Hiroyoshi

Mar. 2020, The Japan Prize Foundation, Heisei Memorial Research Grant Program　　　　　　　　　　　　　　　
アフリカにおける有害金属の汚染対策と環境修復技術 -動物と人が健康に暮らせる世界の創成を目指して
Syota Nakayama;Hokuto Nakata, Y Uchida, Mayumi Ito, Masato Hiwatari

Mar. 2020, 資源・素材学会, Paper award　　　　　　　　　　　　　　　
alvanic Microencapsulation (GME) Using Zero-Valent Aluminum and Zero-Valent Iron to Suppress Pyrite Oxidation
S. Seng, C.B. Tabelin, M. Kojima, N. Hiroyoshi, M. Ito

Mar. 2005, The Mining and Materials Processing Institute of Japan, Best Poster Award　　　　　　　　　　　　　　　
単体分離促進のための電気パルスによる選択粉砕機構の解明～石炭含有鉱物の粉砕性は何で決まるのか～
伊藤 真由美

Mar. 2005, 資源・素材学会第30回奨励賞, 資源・素材学会第30回奨励賞　　　　　　　　　　　　　　　
Advanced Coal Cleaningに関する一連の研究’
伊藤 真由美

Jun. 2003, 環境資源工学会, 環境資源工学会第110回例会，ポスター賞　　　　　　　　　　　　　　　
伊藤 真由美

Assessing the efficacy of phosphate and lime amendments in immobilizing three forms of lead in contaminated soil: An in vivo study on C57/BL6 mice simulating environmentally realistic exposure pathways.
Nyein Chan Soe, Takashi Fujimori, Kenji Shiota, Rio Doya, Walubita Mufalo, Mayumi Ito, Tsutomu Sato, Toshifumi Igarashi, Yoshinori Ikenaka, Mayumi Ishizuka, Shouta M M Nakayama
Chemosphere, 374, 144201, 144201, Apr. 2025, [Peer-reviewed], [International Magazine]
English, Scientific journal, Lead (Pb) bioavailability differs depending on the specific Pb species present in the area. Adding organic and inorganic soil amendments can ameliorate the mobility of Pb in the soil. However, there is a scarcity of in vivo studies investigating the impact of these amendments on mammals via environmentally realistic exposure pathways. We evaluated the accumulation of Pb in blood and tissues of mice living on soils spiked with one of three Pb species (hydrocerussite [2PbCO3·Pb(OH)2], lead sulfate [PbSO4], and lead sulfide [PbS]) and compared the efficacy of phosphate (triple super phosphate [TSP] or phosphoric acid) or liming (calcined dolomite) amendments in reducing Pb accumulation from these soils via realistic exposure pathways. The Pb species in the spiked soil were investigated via X-ray absorption near edge structures (XANES) spectroscopy. C57/BL6 mice (six per group) were exposed to both Pb-spiked and amended soils by housing them on the soil for three months and thus simulating realistic exposure pathways. XANES analysis revealed that Pb carbonates were the dominant phase in all Pb-spiked soils. The group exposed to 2PbCO3·Pb(OH)2 had the greatest Pb accumulation in brain, trachea, kidneys, liver, bone, and blood, but not lungs, whereas the PbS-exposed group accumulated more Pb in the lungs. TSP was the most effective chemical stabilizer of the three amendments, facilitating reductions in the 2PbCO3·Pb(OH)2, PbSO4, and PbS exposure groups of 68-88%, 44-62%, and 6-49%, respectively. This suggests that chemical remediation using phosphate sources may be effective for immobilizing various Pb species in soils.

eavy Metal Pollution Assessment and Survey of Rhizosphere Bacterial Communities from Saccharum spontaneum L. in a Rehabilitated Nickel-Laterite Mine in the Philippines　　　　　　　　　　　　　　　
Mainit, Shiela W., Tabelin, Carlito Baltazar, Paglinawan, Florifern C., Guihawan, Jaime Q., Mondejar, Alissa Jane S., Resabal, Vannie Joy T., Madamba, Maria Reina Suzette B., Alonzo, Dennis, Orbecido, Aileen H., Promentilla, Michael Angelo
Minerals, 15, 8, 881, 2025, [Peer-reviewed]
English, Scientific journal

Recovery of Fine Rare Earth Minerals from Simulated Tin Tailings by Carrier Magnetic Separation: Selective Heterogeneous Agglomeration with Coarse Magnetite Particles　　　　　　　　　　　　　　　
Park, Ilhwan, Gumilang, Topan Satria, Pratama, Rinaldi Yudha, Jeon, Sanghee, Tabelin, Carlito Baltazar, Phengsaart, Theerayu, Bilal, Muhammad, Kawamura, Youhei, Ito, Mayumi
Minerals, 15, 7, 757, 2025, [Peer-reviewed]
English

Pilot-scale stabilization of toxic metal leachates from zinc plant residues using half-burnt dolomite: implications for remediation at Kabwe legacy mine in Zambia　　　　　　　　　　　　　　　
Mufalo, Walubita, Arima, Takahiko, Igarashi, Toshifumi, Ito, Mayumi, Sato, Tsutomu, Tomiyama, Shingo, Nyambe, Imasiku, Silwamba, Marthias, Nakata, Hokuto, Nakayama, Shouta
Environmental Geochemistry and Health, 47, 7, 271, 2025, [Peer-reviewed]
English, Scientific journal

Synthesis of Iron-Based and Aluminum-Based Bimetals: A Systematic Review　　　　　　　　　　　　　　　
Balangao, Jeffrey Ken B., Tabelin, Carlito Baltazar, Phengsaart, Theerayu, Zoleta, Joshua B., Arima, Takahiko, Park, Ilhwan, Mufalo, Walubita, Ito, Mayumi, Alorro, Richard D., Orbecido, Aileen H.
Metals, 15, 6, 603, 2025, [Peer-reviewed]
English, Scientific journal

Effects of Salinity Level on Microplastic Removal in Simulated Waters Using Agglomeration–Micro-Flotation　　　　　　　　　　　　　　　
Phengsaart, Theerayu, Srichonphaisarn, Palo, Khwathichak, Worada, Bumrungsak, Chanatip, Park, Ilhwan, Ito, Mayumi, Villacorte-Tabelin, Mylah, Tabelin, Carlito Baltazar, Jeon, Sanghee, Haga, Kazutoshi
Water, 17, 9, 1264, 2025, [Peer-reviewed]
English, Scientific journal

APiS (AI powered intelligence spectrum analyser): hyperspectral imaging machine learning analyser app for mineral processing
Natsuo Okada, Narihiro Owada, Kaito Takizawa, Brian Bino Sinaice, Okhala Muacanhia, Angesom Gebretsadik, Shunki Tanaka, Kosei Aikawa, Ilhwan Park, Mayumi Ito, Yoko Ohtomo, Youhei Kawamura
International Journal of Mining, Reclamation and Environment, 1, 27, Informa UK Limited, 02 Oct. 2024, [Peer-reviewed]
Scientific journal

Microencapsulation-based surface modification for improving flotation separation of Cu-Zn mixed sulfide minerals
Ilhwan Park, Dai Uchida, Sanghee Jeon, Kosei Aikawa, Naoki Hiroyoshi, Mayumi Ito
Minerals Engineering, 213, 108756, 108756, Elsevier BV, Aug. 2024, [Peer-reviewed]
Scientific journal

Role of Semiconductive Property on Selective Cementation Mechanism of Iron Oxides to Gold in Galvanic Interaction with Zero-Valent Aluminum from Gold–Copper Ammoniacal Thiosulfate Solutions
Joshua Zoleta, Kosei Aikawa, Nako Okada, Ilhwan Park, Mayumi Ito, Yogarajah Elakneswaran, Naoki Hiroyoshi
Metals, 14, 5, 550, 550, MDPI AG, 07 May 2024, [Peer-reviewed]
Scientific journal, Iron oxides (hematite, Fe2O3, and magnetite, Fe3O4), previously used as electron mediators in the galvanic system with zero-valent aluminum (ZVAl), have been shown to recover Au upon cementation in Au–Cu ammoniacal thiosulfate media selectively, and this warrants further investigation. This research is focused on investigating the role of the semiconductive properties of metal oxides by performing a cementation experiment by mixing 0.15 g of electron mediators (Fe3O4, Fe2O3, TiO2 (anatase and rutile)) and 0.15 g of zero-valent aluminum powder as an electron donor in various electrochemical experiments. The results revealed that upon the cementation experiment, synthetic Fe2O3 and Fe3O4 were consistently able to selectively recover Au at around 90% and Cu at around 20%. Compared to activated carbon (AC), TiO2, in anatase and rutile forms, obtained selective recovery of gold, but the recovery was utterly insignificant compared to that of iron oxides, obtaining an average of 93% Au and 63% Cu recovery. The electrochemical and surface analysis supports the results obtained upon the cementation process, where TiO2, upon cyclic voltammetry (CV), obtained two reduction peaks centered at −1.0 V and −0.5 V assigned to reducing Au and Cu ions, respectively. Furthermore, various electrochemical impedance spectroscopic analyses revealed that the flat band potential obtained in the Mott–Schottky plot is around −1.0 V and −0.2 V for iron oxides and titanium oxides, respectively, suggesting that the electrons travel from semiconductor interface to electrolyte interface, and electrons are accessible only to Au ions in the electrolyte interface (reduction band edge around −1.0 V). The determination of this selective cementation mechanism is one of a kind. It has been proposed that the semiconductive properties of Fe2O3, Fe3O4, and, by configuring their relative energy band diagram, the travel of electrons from the iron oxide–electrolyte interface facilitate the selective cementation towards Au(S2O3)23+ ions in gold–copper ammoniacal thiosulfate solutions.

Isolation and Characterization of Indigenous Ureolytic Bacteria from Mindanao, Philippines: Prospects for Microbially Induced Carbonate Precipitation (MICP)
Kryzzyl M. Maulas, Charla S. Paredes, Carlito Baltazar Tabelin, Mark Anthony Jose, Einstine M. Opiso, Takahiko Arima, Ilhwan Park, Walubita Mufalo, Mayumi Ito, Toshifumi Igarashi, Theerayut Phengsaart, Edrhea Villas, Sheila L. Dagondon, Ephrime B. Metillo, Mylene M. Uy, Al James A. Manua, Mylah Villacorte-Tabelin
Minerals, 14, 4, 339, 339, MDPI AG, 26 Mar. 2024, [Peer-reviewed]
Scientific journal, Microbially induced carbonate precipitation (MICP), a widespread phenomenon in nature, is gaining attention as a low-carbon alternative to ordinary Portland cement (OPC) in geotechnical engineering and the construction industry for sustainable development. In the Philippines, however, very few works have been conducted to isolate and identify indigenous, urease-producing (ureolytic) bacteria suitable for MICP. In this study, we isolated seven, ureolytic and potentially useful bacteria for MICP from marine sediments in Iligan City. DNA barcoding using 16s rDNA identified six of them as Pseudomonas stutzeri, Pseudomonas pseudoalcaligenes, Bacillus paralicheniformis, Bacillus altitudinis, Bacillus aryabhattai, and Stutzerimonas stutzeri but the seventh was not identified since it was a bacterial consortium. Bio-cementation assay experiments showed negligible precipitation in the control (without bacteria) at pH 7, 8, and 9. However, precipitates were formed in all seven bacterial isolates, especially between pH 7 and 8 (0.7–4 g). Among the six identified bacterial species, more extensive precipitation (2.3–4 g) and higher final pH were observed in S. stutzeri, and B. aryabhattai, which indicate better urease production and decomposition, higher CO2 generation, and more favorable CaCO3 formation. Characterization of the precipitates by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) and attenuated total reflectance Fourier transform spectroscopy (ATR-FTIR) confirmed the formation of three carbonate minerals: calcite, aragonite, and vaterite. Based on these results, all six identified indigenous, ureolytic bacterial species from Iligan City are suitable for MICP provided that the pH is controlled between 7 and 8. To the best of our knowledge, this is the first report of the urease-producing ability and potential for MICP of P. stutzeri, P. pseudoalcaligenes, S. stutzeri, and B. aryabhattai.

Effect of chicken manure amendment on lead burden in mice: exposure to lead-spiked soil
Nyein Chan Soe, Yared Beyene Yohannes, Takamitsu Ohigashi, Hokuto Nakata, Chikae Tatsumi, Yoshitaka Uchida, Walubita Mufalo, Mayumi Ito, Tsutomu Sato, Toshifumi Igarashi, Yoshinori Ikenaka, Mayumi Ishizuka, Shouta M. M. Nakayama
Journal of Soils and Sediments, Springer Science and Business Media LLC, 13 Mar. 2024, [Peer-reviewed]
Scientific journal

Insights on hazardous metal bioaccessibility, and groundwater impacted by Zn residues from a legacy mine and risk evaluation of adjacent soils
Walubita Mufalo, Takahiko Arima, Toshifumi Igarashi, Mayumi Ito, Tsutomu Sato, Shingo Tomiyama, Imasiku Nyambe, Carlito Baltazar Tabelin, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Environmental Geochemistry and Health, 46, 2, Springer Science and Business Media LLC, 06 Feb. 2024, [Peer-reviewed]
Scientific journal

A Mixed Media Approach Using Locally Available Neutralizing Materials for the Passive Treatment of Acid Mine Drainage
Joshua Pascual Pocaan, Casey Oliver A. Turingan, Carlito Baltazar Tabelin, Joshua B. Zoleta, Takahiko Arima, Ilhwan Park, Mayumi Ito, Aileen H. Orbecido
Heliyon, 11, 3, Research Square Platform LLC, 05 Jan. 2024, [Peer-reviewed]
English, Scientific journal, Abstract

Acid mine drainage (AMD)—the strongly acidic and highly polluted effluents from mine sites—are generally managed via active or passive treatment. Active treatment strategies are effective but requires continuous input of energy, chemicals and manpower making them unsustainable in the long term. Because of this, passive treatment is explored as a more sustainable alternative especially for abandoned and legacy mines. Recent studies of the authors have explored the use limestone and waste materials like low-grade ores (LGO), fly ash (FA), and concrete wastes for AMD treatment and found that although these materials generated alkalinity individually, they could only partially remove sulfate (SO₄²⁻) and some heavy metals. To address this limitation, a mixed media approach using these four materials is proposed to neutralize the pH of AMD and maximize heavy metals (Cu, Fe, Mn, Ni, and Al) and SO₄²⁻ removal. A total of twenty (20) mixtures of the four materials were identified based on the response surface methodology (RSM) experimental design. Laboratory-scale experiments using simulated AMD were performed to assess the performance of each mixture by monitoring the pH, oxidation-reduction potential (Eh), electrical conductivity (EC), metal concentrations, and SO₄²⁻ concentration. Based on the results, three optimized mixed media compositions were identified in wt%: (i) 43% LGO, 40% limestone, 17% CW; (ii) 44% LGO, 51% limestone, 6% CW; and (iii) 89% limestone, 11% LGO. Overall, simulated AMD passively treated by the optimized mixed media compositions met the Philippine effluent standards except for SO₄²⁻. Simulated AMD treated by the optimized mixed media achieved pH values of < 9 and removal efficiencies for Cu, Fe, Mn, Ni, and Al of about 99%, 99%, 98%, 70%, and 96%, respectively.

The floatability dependence of monazite, xenotime, and zircon on pH and temperature using ionic liquids as collectors　　　　　　　　　　　　　　　
Julapong, Pongsiri, Aikawa, Kosei, Park, Ilhwan, Ito, Mayumi, Tabelin, Carlito Baltazar, Phengsaart, Theerayu, Numprasanthai, Apisi
Minerals Engineering, 216, 2024, [Peer-reviewed]
English, Scientific journal

半焼成ドロマイトおよびリン酸塩を用いたカブウェ鉱山鉱さい中の重金属不溶化特性
Takahiko ARIMA, Kenta NOTO, Walubita MUFALO, Toshifumi IGARASHI, Mayumi ITO, Tsutomu SATO, Hokuto NAKATA, Shouta NAKAYAMA, Mayumi ISHIZUKA
Resources Processing, 70, 3, 141, 150, The Resources Processing Society of Japan, 2024, [Peer-reviewed]
Scientific journal

Modified Diglycolamide Resin: Characterization and Potential Application for Rare Earth Element Recovery
Junnile L. Romero, Carlito Baltazar Tabelin, Ilhwan Park, Richard D. Alorro, Joshua B. Zoleta, Leaniel C. Silva, Takahiko Arima, Toshifumi Igarashi, Takunda Mhandu, Mayumi Ito, Steffen Happel, Naoki Hiroyoshi, Vannie Joy T. Resabal
Minerals, 13, 10, 1330, 1330, MDPI AG, 14 Oct. 2023, [Peer-reviewed]
Scientific journal, Rare earth elements (REEs) are crucial for green energy applications due to their unique properties, but their extraction poses sustainability challenges because the global supply of REEs is concentrated in a few countries, particularly China, which produces 70% of the world’s REEs. To address this, the study investigated TK221, a modified extraction chromatographic resin featuring diglycolamide (DGA) and carbamoyl methyl phosphine oxide (CMPO), as a promising adsorbent for REE recovery. The elemental composition and functional groups of DGA and CMPO on the polystyrene-divinylbenzene (PS-DVB) support of TK221 were confirmed using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and X-ray photoelectron spectroscopy (XPS). The adsorption kinetics of neodymium (Nd), yttrium (Y), cerium (Ce), and erbium (Er) followed the pseudo-second-order kinetic model and Langmuir isotherm, indicating monolayer chemisorption. Furthermore, iron (Fe) adsorption reached apparent equilibrium after 360 min, with consistent Fe adsorption observed at both 360 min and 1440 min. The inclusion of Fe in the study is due to its common presence as an impurity in most REE leachate solutions. The Fe adsorption isotherm results are better fitted with the Langmuir isotherm, implying chemisorption. Maximum adsorption capacities (qmax) of the resin were determined as follows: Nd (45.3 mg/g), Ce (43.1 mg/g), Er (35.1 mg/g), Y (15.6 mg/g), and Fe (12.3 mg/g). ATR-FTIR analysis after adsorption suggested that both C=O and P=O bands shifted from 1679 cm−1 to 1618 cm−1 and 1107 cm−1 to 1142 cm−1 for Y, and from 1679 cm−1 to 1607 cm−1 and 1107 cm−1 to 1135 cm−1 for Ce, implying possible coordination with REEs. These results suggest that TK221 has a huge potential as an alternative adsorbent for REE recovery, thus contributing to sustainable REE supply diversification.

A novel recycling route for aluminum alloys: Synthesis of Fe/Al bimetallic materials and magnetic separation
Ilhwan Park, Mayumi Ito, Sanghee Jeon, Carlito Baltazar Tabelin, Theerayut Phengsaart, Marthias Silwamba, Naoki Hiroyoshi
Minerals Engineering, 201, 108202, 108202, Elsevier BV, Oct. 2023, [Peer-reviewed]
Scientific journal

Recent Studies and Technologies in the Separation of Polyvinyl Chloride for Resources Recycling: A Systematic Review
Theerayut Phengsaart, Pongsiri Julapong, Chaiwat Manositchaikul, Palot Srichonphaisarn, Monthicha Rawangphai, Onchanok Juntarasakul, Kosei Aikawa, Sanghee Jeon, Ilhwan Park, Carlito Baltazar Tabelin, Mayumi Ito
Sustainability, 15, 18, 13842, 13842, MDPI AG, 18 Sep. 2023, [Peer-reviewed]
Scientific journal, Material recycling and thermal treatment are the two most common recycling methods employed for plastic waste management. Thermal treatment for energy recovery is more widely applied compared with material recycling because the latter requires a high efficiency of separation and a high purity of products. Unfortunately, certain plastics like polyvinyl chloride (PVC) are unsuitable for thermal treatment because they contain additives like chloride (Cl−) that have adverse effects on refractory materials used in boilers. As a result of this, mixed plastic wastes containing PVC generally end up in landfills. PVC-bearing mixed plastics, however, remain valuable resources as championed by the United Nation Sustainable Development Goals (UN-SDGs): Goal 12 “Responsible production and consumption”, and their recycling after the removal of PVC is important. In this paper, recent studies (2012–2021) related to the separation of PVC from other types of plastics were systematically reviewed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A total of 66 articles were selected, reviewed, and summarized. The results showed that various separation technologies conventionally applied to mineral processing—selective comminution, gravity separation, magnetic separation, electrical separation, and flotation—have been studied for PVC separation, and the majority of these works (>60%) focused on flotation. In addition, more advanced technologies including sorting and density-surface-based separation were introduced between 2019 and 2021.

A Pretreatment of Refractory Gold Ores Containing Sulfide Minerals to Improve Gold Leaching by Ammonium Thiosulfate: A Model Experiment Using Gold Powder and Arsenic-Bearing Sulfide Minerals
Takunda Joseph Mhandu, Ilhwan Park, Sanghee Jeon, Sohta Hamatsu, Yogarajah Elakneswaran, Mayumi Ito, Naoki Hiroyoshi
Metals, 13, 8, 1357, 1357, MDPI AG, 28 Jul. 2023, [Peer-reviewed]
English, Scientific journal, The use of thiosulfate to extract gold from refractory ores is promising because of its non-toxicity and high selectivity. Sulfide minerals (i.e., pyrite, arsenopyrite, chalcopyrite), major gold carriers in refractory gold ores, however, hinder gold extraction due to the high consumption of a lixiviant. In this study, a new method to improve gold extraction from sulfide bearing gold ores is proposed based on the model experiments using a mixture of gold powder and arsenopyrite-bearing sulfide (HAsBS) ore. The effects of HAsBS ore on gold leaching in ammonium thiosulfate solutions were investigated, and it was found that gold extraction in the presence of HAsBS ore was suppressed because of the unwanted decomposition of thiosulfate on the surface of sulfide minerals. To improve gold extraction in the presence of the sulfide minerals, this study investigated the effects of the pretreatment of HAsBS ore using ammonium solutions containing cupric ions and confirmed that HAsBS ore was oxidized in the pretreatment and its surface was covered by the oxidation products. As a result, thiosulfate consumption was minimized in the subsequent gold leaching step using ammonium thiosulfate, resulting in an improvement in gold extraction from 10% to 79%.

Rare Earth Elements Recovery from Primary and Secondary Resources Using Flotation: A Systematic Review
Pongsiri Julapong, Apisit Numprasanthai, Ladda Tangwattananukul, Onchanok Juntarasakul, Palot Srichonphaisarn, Kosei Aikawa, Ilhwan Park, Mayumi Ito, Carlito Baltazar Tabelin, Theerayut Phengsaart
Applied Sciences, 13, 14, 8364, 8364, MDPI AG, 19 Jul. 2023, [Peer-reviewed]
Scientific journal, Rare earth minerals (REMs) contain rare earth elements (REEs) that are important in modern technologies due to their unique magnetic, phosphorescent, and catalytic properties. However, REMs are not only non-renewable resources but also non-uniformly distributed on the Earth’s crust, so the processing of REE-bearing secondary resources via recycling is one potential route to ensure the long-term sustainability of REE supply. Flotation—a method that separates materials based on differences in their surface wettability—is a process applied for both mineral processing and recycling of REEs, especially when the particles are fine and/or a high-purity product is required. In this review, studies about rare earth flotation from 2012 to 2021 were systematically reviewed using the PRISMA guideline. It was found that most REM flotation research works focused on finding better collectors and depressants while, for recycling, studies on advanced flotation techniques like froth flotation, ion flotation, solvent sublation, electroflotation, and adsorbing colloid flotation with an emphasis on the recovery of dissolved REEs from aqueous solutions dominated.

Selective Cementation of Gold Using an Iron Oxide and Zero-Valent Aluminum Galvanic System from Gold–Copper Ammoniacal Thiosulfate Solutions
Joshua Zoleta, Sanghee Jeon, Akuru Kuze, Nako Okada, Ilhwan Park, Mayumi Ito, Yogarajah Elakneswaran, Naoki Hiroyoshi
Metals, 13, 7, 1289, 1289, MDPI AG, 18 Jul. 2023, [Peer-reviewed]
Scientific journal, Ammonium thiosulfate leaching is a promising alternative to the conventional cyanide method for extracting gold from ores. However, strategies for recovering gold from the leachate are less commercially used due to its low affinity to gold. The present study investigated the recovery of gold from the leachate using iron oxides (hematite, Fe2O3 or magnetite, Fe3O4). Cementation experiments were conducted by mixing 0.15 g of aluminum powder as an electron donor and 0.15 g of an electron mediator (activated carbon, hematite, or magnetite) in 10 mL of ammonium thiosulfate leachate containing 100 mg/L gold ions and 10 mM cupric ions for 24 h at 25 °C. The results of the solution analysis showed that when activated carbon (AC) was used, the gold was recovered together with copper (recoveries were 99.99% for gold and copper). However, selective gold recovery was observed when iron oxides were used, where the gold and copper recoveries were 89.7% and 21% for hematite and 85.9% and 15.4% for magnetite, respectively. An electrochemical experiment was also conducted to determine the galvanic interaction between the electron donor and electron mediator in a conventional electrochemical setup (hematite/magnetite–Al as the working electrode, Pt as the counter electrode, Ag/AgCl as the reference electrode) in a gold–thiosulfate medium. Cyclic voltammetry showed a gold reduction “shoulder-like” peak at −1.0 V using hematite/Al and magnetite/Al electrodes. Chronoamperometry was conducted and operated at a constant voltage (−1.0 V) determined during cyclic voltammetry and further analyzed using SEM-EDX. The results of the SEM-EDX analysis for the cementation products and electrochemical experiments confirmed that the gold was selectively deposited on the iron oxide surface as an electron mediator.

Carrier Flotation Using Coarse Pyrite for Improving the Recovery of Finely Ground Chalcopyrite: Development of Post-Process of Carrier Flotation to Separate Finely Ground Chalcopyrite Particles from Coarse Pyrite Particles
Muhammad Bilal, Ilhwan Park, Mayumi Ito, Fawad Ul Hassan, Kosei Aikawa, Sanghee Jeon, Naoki Hiroyoshi
Minerals, 13, 7, 916, 916, MDPI AG, 07 Jul. 2023, [Peer-reviewed]
Scientific journal, Carrier flotation is a technique that can recover fine particles by using coarse carrier particles during the flotation process. In heterogeneous carrier flotation, coarse mineral particles of different minerals are used as carriers to recover fine mineral particles. By using Cu2+-treated pyrite particles as carriers, fine chalcopyrite particles recovery could be improved. However, a disadvantage of this heterogeneous carrier flotation is that it requires a post-flotation separation process to improve the grade of the final Cu concentrate. This study tested mechanical and chemical treatments to detach finely ground chalcopyrite (D50~3.5 µm) particles from Cu2+-treated coarse pyrite particles (−125 + 106 µm) after flotation. The results showed that the ultrasonic treatment was not effective to detach chalcopyrite fines from Cu2+-treated pyrite particles. However, acid treatment was effective to detach chalcopyrite fines from coarse pyrite particles. At pH 2, approximately 96% of chalcopyrite fines were detached from coarse Cu2+-treated pyrite particles. The acid treatment of flotation froth (mixture of chalcopyrite fines and Cu2+-treated pyrite particles) decomposed the collector KAX (potassium amyl xanthate) and dissolved the Cu precipitates adsorbed on the pyrite surface. This weakened the hydrophobic attraction force between the chalcopyrite fines and coarse pyrite particles, thus promoting the detachment of chalcopyrite fines from Cu2+-treated coarse pyrite particles.

Immobilization of Pb and Zn leached from mining residue materials in Kabwe, Zambia: Performance of calcined dolomite in column experiments
Walubita Mufalo, Pawit Tangviroon, Takahiko Arima, Toshifumi Igarashi, Mayumi Ito, Tsutomu Sato, Kenta Noto, Takeshi Kawashima, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Journal of Geochemical Exploration, 249, 107209, 107209, Elsevier BV, Jun. 2023, [Peer-reviewed]
Scientific journal

Social cost of mining-related lead (Pb) pollution in Kabwe, Zambia, and potential remediation measures
Daichi Yamada, Masato Hiwatari, Daiju Narita, Peter Hangoma, Bona Chitah, Hokuto Nakata, Shouta M.M. Nakayama, John Yabe, Mayumi Ito, Toshifumi Igarashi, Mayumi Ishizuka, Golden Zyambo
Science of The Total Environment, 865, 161281, 161281, Elsevier BV, Mar. 2023, [Peer-reviewed]
Scientific journal

Development of microencapsulation-hybrid jig separation technique as a clean coal technology　　　　　　　　　　　　　　　
Phengsaart, Theerayu, Park, Ilhwan, Pasithbhattarabhorn, Jirathpapol, Srichonphaisarn, Palo, Kertbundit, Chinawich, Phumkokrux, Nutthakarn, Juntarasakul, Onchanok, Tabelin, Carlito Baltazar, Hiroyoshi, Naoki, Ito, Mayumi
Energies, 16, 5, 2432, 2023, [Peer-reviewed]
English, Scientific journal

Conventional and recent advances in gravity separation technologies for coal cleaning: A systematic and critical review　　　　　　　　　　　　　　　
Phengsaart, Theerayu, Srichonphaisan, Palo, Kertbundit, Chinawich, Soonthornwiphat, Natatsawas, Sinthugoot, Somthida, Phumkokrux, Nutthakarn, Juntarasakul, Onchanok, Maneeintr, Kreangkrai, Numprasanthai, Apisi, Park, Ilhwan
Heliyon, 9, 2, 2023, [Peer-reviewed]
English, Scientific journal

Flotation of Copper Ores with High Cu/Zn Ratio: Effects of Pyrite on Cu/Zn Separation and an Efficient Method to Enhance Sphalerite Depression
Kosei Aikawa, Mayumi Ito, Nodoka Orii, Sanghee Jeon, Ilhwan Park, Kazutoshi Haga, Taro Kamiya, Tatsuru Takahashi, Kazuya Sunada, Taisuke Sakakibara, Tatsuhiro Ono, Refilwe S. Magwaneng, Naoki Hiroyoshi
Minerals, 12, 9, 1103, 1103, MDPI AG, 30 Aug. 2022, [Peer-reviewed]
Scientific journal, Porphyry copper deposits are important sources of copper and typically processed by flotation to produce copper concentrates. As mining areas become deeper, the amounts of impurities, such as sphalerite, can be increased in copper ores, so the appropriate depression of sphalerite floatability should be achieved to obtain saleable copper concentrates. In this study, the flotation behaviors of chalcopyrite and sphalerite in model samples mimicking copper ores with high Cu/Zn ratios (i.e., the ratio of chalcopyrite/sphalerite = 13:1) were investigated with zinc sulfate as a depressant for sphalerite. In addition, the effect of pyrite—a major gangue mineral in copper ores—on the depression of sphalerite floatability with zinc sulfate was examined. When sphalerite and chalcopyrite coexisted, the floatability of the former was effectively depressed by zinc sulfate (Zn recovery: <12%), whereas the presence of pyrite promoted the release of Cu2+ due to the galvanic interaction with chalcopyrite, which resulted in the elimination of the effectiveness of zinc sulfate in depressing sphalerite floatability (Zn recovery: >90%). Despite the presence of much higher amounts of chalcopyrite and pyrite than sphalerite, the application of nitrogen (N2) gas limiting the galvanic interaction between pyrite and chalcopyrite by reducing the dissolved oxygen (DO) concentration in the system effectively depressed the floatability of sphalerite (Zn recovery: <30%).

Development of a Sustainable Process for Complex Sulfide Ores Containing Anglesite: Effect of Anglesite on Sphalerite Floatability, Enhanced Depression of Sphalerite by Extracting Anglesite, and Recovery of Extracted Pb2+ as Zero-Valent Pb by Cementation Using Zero-Valent Fe
Kosei Aikawa, Mayumi Ito, Atsuhiro Kusano, Sanghee Jeon, Ilhwan Park, Naoki Hiroyoshi
Minerals, 12, 6, 723, 723, MDPI AG, 06 Jun. 2022, [Peer-reviewed]
Scientific journal, The presence of anglesite (PbSO4) in complex sulfide ores negatively affects the separation of Cu-Pb sulfides and sphalerite (ZnS) due to lead activation, and PbSO4 rejected to tailings dams contaminates the surrounding environment with lead. To address these problems, this study investigated the application of ethylene diamine tetra acetic acid (EDTA) pretreatment extracting PbSO4 to ZnS flotation and the recovery of the extracted Pb2+ as zero-valent Pb by cementation using zero-valent iron (ZVI). The application of EDTA pretreatment could extract ~99.8% of PbSO4, thus depressing ZnS floatability from 82% to 30%. In addition, cementation using ZVI could recover ~99.7% of Pb2+ from the leachate of EDTA pretreatment.

Impacts of Surface Water on Windborne Lead Dispersion from the Zinc Plant Leach Residue in Kabwe, Zambia
Shinsaku Nakamura, Toshifumi Igarashi, Yoshitaka Uchida, Mayumi Ito, Kazuyo Hirose, Tsutomu Sato, Walubita Mufalo, Meki Chirwa, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Minerals, 12, 5, May 2022, [Peer-reviewed]
Scientific journal

Alkaline Leaching and Concurrent Cementation of Dissolved Pb and Zn from Zinc Plant Leach Residues
Marthias Silwamba, Mayumi Ito, Naoki Hiroyoshi, Carlito Baltazar Tabelin, Ryota Hashizume, Tomoki Fukushima, Ilhwan Park, Sanghee Jeon, Toshifumi Igarashi, Tsutomu Sato, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Minerals, 12, 4, Apr. 2022, [Peer-reviewed]
Scientific journal

Heterogenous carrier flotation technique for recovering finely ground chalcopyrite particles using coarse pyrite particles as a carrier
Muhammad Bilal, Mayumi Ito, Riku Akishino, Xiangning Bu, Fawad Ul Hassan, Ilhwan Park, Sanghee Jeon, Kosei Aikawa, Naoki Hiroyoshi
Minerals Engineering, 180, Apr. 2022, [Peer-reviewed]
Scientific journal

A simple and efficient recovery technique for gold ions from ammonium thiosulfate medium by galvanic interactions of zero-valent aluminum and activated carbon: A parametric and mechanistic study of cementation
S. Jeon, S. Bright, I. Park, C.B. Tabelin, M. Ito, N. Hiroyoshi
Hydrometallurgy, 208, Feb. 2022, [Peer-reviewed]

A Kinetic Study on Enhanced Cementation of Gold Ions by Galvanic Interactions between Aluminum (Al) as an Electron Donor and Activated Carbon (AC) as an Electron Mediator in Ammonium Thiosulfate System
S. Jeon, S. Bright, I. Park, A. Kuze, M. Ito, N. Hiroyoshi
Minerals, 12, 1, Jan. 2022, [Peer-reviewed]

Development of the reverse hybrid jig: Separation of polyethylene and cross-linked polyethylene from eco-cable wire
Mayumi Ito, Ayumu Saito, Megumi Takeuchi, Nana Murase, Theerayut Phengsaart, Carlito Baltazar Tabelin, Naoki Hiroyoshi
Minerals Engineering, 174, Elsevier Ltd, 01 Dec. 2021, [Peer-reviewed]
English, Scientific journal

Beneficiation of Low-Grade Rare Earth Ore from Khalzan Buregtei Deposit (Mongolia) by Magnetic Separation
I. Park, Y. Kanazawa, N. Sato, P. Galtchandmani, M. K. Jha, C.B. Tabelin, S. Jeon, M. Ito, N. Hiroyoshi
Minerals, 11, 12, Dec. 2021, [Peer-reviewed]

Addition of Fe3O4 as electron mediator for enhanced cementation of Cd2+ and Zn2+ on aluminum powder from sulfate solutions and magnetic separation to concentrate cemented metals from cementation products
S. Choi, S Jeon, I. Park, M. Ito, N. Hiroyoshi
Journal of Environmental Chemical Engineering, 9, 6, Dec. 2021, [Peer-reviewed]

Solid-Phase Partitioning and Leaching Behavior of Pb and Zn from Playground Soils in Kabwe, Zambia.
Walubita Mufalo, Pawit Tangviroon, Toshifumi Igarashi, Mayumi Ito, Tsutomu Sato, Meki Chirwa, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Toxics, 9, 10, 04 Oct. 2021, [Peer-reviewed], [International Magazine]
English, Scientific journal, Zambia's Kabwe mine wastes (KMWs) are responsible for contaminating the surrounding soil and dust in the Kabwe district. Unfortunately, these wastes arise from the historical mining activities of lead (Pb) and Zinc (Zn), which lacked adequate waste management strategies. As a result, potentially toxic elements (PTEs) (Pb and Zn) spread across the Kabwe district. To assess the soil pollution derived from previous mining activities, we studied topsoil samples (n = 8) from the school playground soils (SPs). In this study, the degree of contamination, geochemical partitioning, and leachability, coupled with the release and retention of Pb and Zn, were studied. The SPs were classified as extremely enriched (EF > 40) and contaminated with Pb (Igeo > 5). On average, Pb (up to 89%) and Zn (up to 69%) were bound with exchangeable, weak acid-soluble, reducible and oxidizable phases, which are considered as 'geochemically mobile' phases in the environment. The leachates from the soils (n = 5) exceeded the Zambian standard (ZS: 190:2010) for Pb in potable drinking water (Pb < 0.01 mg/L). Furthermore, the spatial distribution of Pb and Zn showed a significant reduction in contents of Pb and Zn with the distance from the mine area.

Simultaneous extraction and recovery of lead using citrate and micro-scale zero-valent iron for decontamination of polluted shooting range soils
Marthias Silwamba, Mayumi Ito, Carlito Baltazar Tabelin, Ilhwan Park, Sanghee Jeon, MasaoTakada, Yasushi Kubo, Naohiro Hokari, Masami Tsunekawa, Naoki Hiroyoshi
Environmental Advances, 5, Oct. 2021, [Peer-reviewed]

Repurposing of aluminum scrap into magnetic Al0/ZVI bimetallic materials: Two-stage mechanical-chemical synthesis and characterization of products
C.B. Tabelin, V.J.T. Resabal, I. Park, M.G.B. Vilanueva, S. Choi, R. Ebio, P.J. Cabural, M.V. Tabelin, A. Orbecido, R.D. Alorro, S. Jeon, M. Ito, N. Hiroyoshi
Journal of Cleaner Production, 317, Oct. 2021, [Peer-reviewed]

A novel arsenic immobilization strategy via a two-step process: Arsenic concentration from dilute solution using schwertmannite and immobilization in Ca–Fe–AsO4 compounds
I. Park, T. Ryota, T Yuto, C.B. Tabelin, T. Phengsaart, S. Jeon, M. Ito, N. Hiroyoshi
Journal of Environmental Management, 295, Oct. 2021, [Peer-reviewed]

Agglomeration-flotation of finely ground chalcopyrite using surfactant-stabilized oil emulsions: Effects of co-existing minerals and ions
V. Horn, I. Park, M. Ito, H Shimada, T. Suto, C.B. Tabelin, S. Jeon, N. Hiroyoshi
Minerals Engineering, 171, Sep. 2021, [Peer-reviewed]

The Effects of Coexisting Copper, Iron, Cobalt, Nickel, and Zinc Ions on Gold Recovery by Enhanced Cementation via Galvanic Interactions between Zero-Valent Aluminum and Activated Carbon in Ammonium Thiosulfate Systems
S. Jeon, S. Bright, I. Park, C.B. Tabelin, M. Ito, N. Hiroyoshi
Metals, 11, 9, Aug. 2021, [Peer-reviewed]

Enhanced pyrite passivation by carrier-microencapsulation using Fe-catechol and Ti-catechol complexes
X. Li, I. Park, C.B. Tabelin, K. Naruwa, T. Goda, C Harada, S. Jeon, M. Ito, N. Hiroyoshi
Journal of Hazardous Materials, 416, Aug. 2021, [Peer-reviewed]

Evaluation of Dispersion of Lead-Bearing Mine Wastes in Kabwe District, Zambia
Shinsaku Nakamura, Toshifumi Igarashi, Yoshitaka Uchida, Mayumi Ito, Kazuyo Hirose, Tsutomu Sato, Walubita Mufalo, Meki Chirwa, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
MINERALS, 11, 8, Aug. 2021, [Peer-reviewed]
English, Scientific journal

Copper and critical metals production from porphyry ores and E-wastes: A review of resource availability, processing/recycling challenges, socio-environmental aspects, and sustainability issues
C.B. Tabelin, I. Park, T. Phengsaart, S. Jeon, M.V. Tabelin, D. Alonzo, K. Yoo, M. Ito, N. Hiroyoshi
Resources, Conservation and Recycling, 170, Jul. 2021, [Peer-reviewed]

Development of a restraining wall and screw-extractor discharge system for continuous jig separation of mixed plastics
T. Phengsaart, M. Ito, S. Kimura, A. Azuma, K. Hori, H. Tanno, S. Jeon, I. Park, C.B. Tabelin, N. Hiroyoshi
Minerals Engineering, 168, Jul. 2021, [Peer-reviewed]

Enhanced cementation of Cd2+, Co2+, Ni2+, and Zn2+ on Al from sulfate solutions by activated carbon addition
Sanghyeon Choi, Sanghee Jeon, Ilhwan Park, Carlito Baltazar Tabelin, Mayumi Ito, Naoki Hiroyoshi
Hydrometallurgy, 201, Elsevier B.V., 01 May 2021, [Peer-reviewed]
English, Scientific journal

Suppression of arsenopyrite oxidation by microencapsulation using ferric-catecholate complexes and phosphate
I. Park, K. Higuchi, C.B. Tabelin, S. Jeon, M. Ito, N. Hiroyoshi
Chemosphere, 269, Apr. 2021, [Peer-reviewed]

Flotation separation of chalcopyrite and molybdenite assisted by microencapsulation using ferrous and phosphate ions: Part II. flotation
Ilhwan Park, Seunggwan Hong, Sanghee Jeon, Mayumi Ito, Naoki Hiroyoshi
Metals, 11, 3, 1, 11, MDPI AG, 01 Mar. 2021, [Peer-reviewed]
English, Scientific journal

Effects of coarse chalcopyrite on flotation behavior of fine chalcopyrite
M. Bilal, M. Ito, K. Koike, V. Hornn, F.U. Hassan, S. Jeon, I. Park, N. Hiroyoshi
Minerals Engineering, 163, Mar. 2021, [Peer-reviewed]

Flotation of Seafloor Massive Sulfide Ores: Combination of Surface Cleaning and Deactivation of Lead-Activated Sphalerite to Improve the Separation Efficiency of Chalcopyrite and Sphalerite
Kosei Aikawa, Mayumi Ito, Atsuhiro Kusano, Ilhwan Park, Tatsuya Oki, Tatsuru Takahashi, Hisatoshi Furuya, Naoki Hiroyoshi
Metals, 11, 2, 253, 253, MDPI AG, 02 Feb. 2021, [Peer-reviewed]
Scientific journal, The purpose of this study is to propose the flotation procedure of seafloor massive sulfide (SMS) ores to separate chalcopyrite and galena as froth and sphalerite, pyrite, and other gangue minerals as tailings, which is currently facing difficulties due to the presence of water-soluble compounds. The obtained SMS ore sample contains CuFeS2, ZnS, FeS2, SiO2, and BaSO4 in addition to PbS and PbSO4 as Pb minerals. Soluble compounds releasing Pb, Zn2+, Pb2+, and Fe2+/3+ are also contained. When anglesite co-exists, lead activation of sphalerite occurred, and thus sphalerite was recovered together with chalcopyrite as froth. To remove soluble compounds (e.g., anglesite) that have detrimental effects on the separation efficiency of chalcopyrite and sphalerite, surface cleaning pretreatment using ethylene diamine tetra acetic acid (EDTA) was applied before flotation. Although most of anglesite were removed and the recovery of chalcopyrite was improved from 19% to 81% at 20 g/t potassium amyl xanthate (KAX) after EDTA washing, the floatability of sphalerite was not suppressed. When zinc sulfate was used as a depressant for sphalerite after EDTA washing, the separation efficiency of chalcopyrite and sphalerite was improved due to deactivation of lead-activated sphalerite by zinc sulfate. The proposed flotation procedure of SMS ores—a combination of surface cleaning with EDTA to remove anglesite and the depression of lead-activated sphalerite by using zinc sulfate—could achieve the highest separation efficiency of chalcopyrite and sphalerite; that is, at 200 g/t KAX, the recoveries of chalcopyrite and sphalerite were 86% and 17%, respectively.

Enhanced Cementation of Co2+ and Ni2+ from Sulfate and Chloride Solutions Using Aluminum as an Electron Donor and Conductive Particles as an Electron Pathway
S. Choi, S Jeon, I. Park, M. Ito, N. Hiroyoshi
Metals, 11, 2, Feb. 2021, [Peer-reviewed]

Flotation Separation of Chalcopyrite and Molybdenite Assisted by Microencapsulation Using Ferrous and Phosphate Ions: Part I. Selective Coating Formation
Ilhwan Park, Seunggwan Hong, Sanghee Jeon, Mayumi Ito, Naoki Hiroyoshi
Metals, 10, 12, Dec. 2020, [Peer-reviewed]

Solid-phase partitioning and release-retention mechanisms of copper, lead, zinc and arsenic in soils impacted by artisanal and small-scale gold mining (ASGM) activities
Carlito Baltazar Tabelin, Marthias Silwamba, Florifern C. Paglinawan, Alissa Jane S. Mondejar, Ho Gia Duc, Vannie Joy Resabal, Einstine M. Opiso, Toshifumi Igarashi, Shingo Tomiyama, Mayumi Ito, Naoki Hiroyoshi, Mylah Villacorte-Tabelin
Chemosphere, 260, 127574, 127574, Elsevier BV, Dec. 2020, [Peer-reviewed]
Scientific journal

Biosorption of Pb (II) and Zn (II) from aqueous solution by Oceanobacillus profundus isolated from an abandoned mine
Wilson Mwandira, Kazunori Nakashima, Satoru Kawasaki, Allison Arabelo, Kawawa Banda, Imasiku Nyambe, Meki Chirwa, Mayumi Ito, Tsutomu Sato, Toshifumi Igarashi, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Scientific Reports, 10, 1, Springer Science and Business Media LLC, Dec. 2020, [Peer-reviewed]
Scientific journal, The present study investigated biosorption of Pb (II) and Zn (II) using a heavy metal tolerant bacterium Oceanobacillus profundus KBZ 3-2 isolated from a contaminated site. The effects of process parameters such as effect on bacterial growth, pH and initial lead ion concentration were studied. The results showed that the maximum removal percentage for Pb (II) was 97% at an initial concentration of 50 mg/L whereas maximum removal percentage for Zn (II) was at 54% at an initial concentration of 2 mg/L obtained at pH 6 and 30 °C. The isolated bacteria were found to sequester both Pb (II) and Zn (II) in the extracellular polymeric substance (EPS). The EPS facilitates ion exchange and metal chelation-complexation by virtue of the existence of ionizable functional groups such as carboxyl, sulfate, and phosphate present in the protein and polysaccharides. Therefore, the use of indigenous bacteria in the remediation of contaminated water is an eco-friendly way of solving anthropogenic contamination.

Estimation of hybrid jig separation efficiency using a modified concentration criterion based on apparent densities of plastic particles with attached bubbles
Mayumi Ito, Ayumu Saito, Nana Murase, Theerayut Phengsaart, Shoko Kimura, Naho Kitajima, Megumi Takeuchi, Carlito Baltazar Tabelin, Naoki Hiroyoshi
Journal of Material Cycles and Waste Management, 22, 6, 2071, 2080, Springer Japan, 01 Nov. 2020, [Peer-reviewed]
English, Scientific journal

Acid mine drainage formation and arsenic mobility under strongly acidic conditions: Importance of soluble phases, iron oxyhydroxides/oxides and nature of oxidation layer on pyrite
Carlito Baltazar Tabelin, Ryan D. Corpuz, Toshifumi Igarashi, Mylah Villacorte-Tabelin, Richard Diaz Alorro, Kyoungkeun Yoo, Simit Raval, Mayumi Ito, Naoki Hiroyoshi
JOURNAL OF HAZARDOUS MATERIALS, 399, Nov. 2020, [Peer-reviewed]
English, Scientific journal

A review of recent advances in depression techniques for flotation separation of cu–mo sulfides in porphyry copper deposits
Ilhwan Park, Seunggwan Hong, Sanghee Jeon, Mayumi Ito, Naoki Hiroyoshi
Metals, 10, 9, 1, 26, MDPI AG, 01 Sep. 2020, [Peer-reviewed]
English

Kinetic Analysis for Agglomeration-Flotation of Finely Ground Chalcopyrite: Comparison of First Order Kinetic Model and Experimental Results
Vothy Hornn, Mayumi Ito, Ryosuke Yamazawa, Hiromasa Shimada, Carlito Baltazar Tabelin, Sanghee Jeon, Ilhwan Park, Naoki Hiroyoshi
61, 10, Sep. 2020, [Peer-reviewed]

Immobilization of Lead and Zinc Leached from Mining Residual Materials in Kabwe, Zambia: Possibility of Chemical Immobilization by Dolomite, Calcined Dolomite, and Magnesium Oxide
Pawit Tangviroon, Kenta Noto, Toshifumi Igarashi, Takeshi Kawashima, Mayumi Ito, Tsutomu Sato, Walubita Mufalo, Meki Chirwa, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
MINERALS, 10, 9, Sep. 2020, [Peer-reviewed]
English, Scientific journal

Detoxification of lead-bearing zinc plant leach residues from Kabwe, Zambia by coupled extraction-cementation method
Marthias Silwamba, Mayumi Ito, Naoki Hiroyoshi, Carlito Baltazar Tabelin, Tomoki Fukushima, Ilhwan Park, Sanghee Jeon, Toshifumi Igarashi, Tsutomu Sato, Imasiku Nyambe, Meki Chirwa, Kawawa Banda, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Journal of Environmental Chemical Engineering, 8, 4, 104197, 104197, Elsevier BV, Aug. 2020, [Peer-reviewed]
Scientific journal

Agglomeration–Flotation of Finely Ground Chalcopyrite Using Emulsified Oil Stabilized by Emulsifiers: Implications for Porphyry Copper Ore Flotation
Vothy Hornn, Mayumi Ito, Hiromasa Shimada, Carlito Baltazar Tabelin, Sanghee Jeon, Ilhwan Park, Naoki Hiroyoshi
Metals, 10, 7, 912, 912, MDPI AG, 08 Jul. 2020, [Peer-reviewed]
Scientific journal, Flotation is the conventional method for processing porphyry copper deposits, one of the most economically important sources of copper (Cu) worldwide. The rapidly decreasing grade of this type of Cu ore in recent years, however, presents serious problems with fine particle recovery using conventional flotation circuits. This low recovery could be attributed to the low collision efficiency of fine particles and air bubbles during flotation. To improve collision efficiency and flotation recovery, agglomeration of finely ground chalcopyrite (CuFeS2) (D50 = 3.5 μm) using emulsified oil stabilized by emulsifiers was elucidated in this study. Specifically, the effects of various types of anionic (sodium dodecyl sulfate (SDS), potassium amyl xanthate (KAX)), cationic (dodecyl amine acetate (DAA)), and non-ionic (polysorbate 20 (Tween 20)) emulsifiers on emulsified oil stability and agglomeration–flotation efficiency were investigated. When emulsifiers were added, the average size of agglomerates increased, resulting in higher Cu recovery during flotation. This dramatic improvement in flotation efficiency could be attributed to the smaller oil droplet size in emulsified oil and their higher stability in the presence of emulsifiers. The utilization of emulsifiers during agglomeration–flotation not only lowered the required agitation strength for agglomeration but also shortened the agglomeration time, both of which made the process easier to incorporate in existing flotation circuits.

Depression of lead-activated sphalerite by pyrite via galvanic interactions: Implications to the selective flotation of complex sulfide ores
Kosei Aikawa, Mayumi Ito, Tatsuya Segawa, Sanghee Jeon, Ilhwan Park, Carlito Baltazar Tabelin, Naoki Hiroyoshi
Minerals Engineering, 152, 106367, 106367, Elsevier BV, Jun. 2020, [Peer-reviewed]
Scientific journal

Redox potential-dependent chalcopyrite leaching in acidic ferric chloride solutions: Leaching experiments
Nguyen Thi Phuong Thao, Shushi Tsuji, Sanghee Jeon, Ilhwan Park, Carlito Baltazar Tabelin, Mayumi Ito, Naoki Hiroyoshi
Hydrometallurgy, 194, 105299, 105299, Elsevier BV, Jun. 2020, [Peer-reviewed]
Scientific journal

Jig separation of crushed plastics: the effects of particle geometry on separation efficiency
Theerayut Phengsaart, Mayumi Ito, Arisa Azuma, Carlito Baltazar Tabelin, Naoki Hiroyoshi
Journal of Material Cycles and Waste Management, 22, 3, 787, 800, Springer, 01 May 2020, [Peer-reviewed]
English, Scientific journal

Agglomeration-Flotation of Finely Ground Chalcopyrite and Quartz: Effects of Agitation Strength during Agglomeration Using Emulsified Oil on Chalcopyrite
Vothy Hornn, Mayumi Ito, Hiromasa Shimada, Carlito Baltazar Tabelin, Sanghee Jeon, Ilhwan Park, Naoki Hiroyoshi
Minerals, 10, 4, 380, 380, MDPI AG, 23 Apr. 2020, [Peer-reviewed]
Scientific journal, In flotation, the size of mineral particles is one of the most important parameters: when the size becomes fine, collision efficiency of the particles and air bubbles becomes low, causing low flotation recovery. To improve the collision efficiency and flotation kinetics, agglomeration using the emulsified oil of finely ground chalcopyrite (D50 = 3.5 μm) was carried out before flotation. In this study, the effects of agitation strength during agglomeration, kerosene dosage and potassium amyl xanthate (KAX) dosage on the flotation were investigated. Agglomeration using emulsified oil improved Cu recovery because the median diameter of agglomerate increased. With increasing agitation strength, KAX and kerosene dosages, Cu recovery was further increased. Agglomeration-flotation of a mixture containing chalcopyrite and quartz with 1:1 ratio (w/w, weight by weight) showed that Si recovery in froth was low and did not change with varying conditions (agitation strength, KAX and kerosene dosages); however, Cu recovery was significantly improved with increasing agitation strength, KAX and kerosene dosages, and thus the separation efficiency was improved.

Recovery of Lead and Zinc from Zinc Plant Leach Residues by Concurrent Dissolution-Cementation Using Zero-Valent Aluminum in Chloride Medium
Marthias Silwamba, Mayumi Ito, Naoki Hiroyoshi, Carlito Baltazar Tabelin, Ryota Hashizume, Tomoki Fukushima, Ilhwan Park, Sanghee Jeon, Toshifumi Igarashi, Tsutomu Sato, Meki Chirwa, Kawawa Banda, Imasiku Nyambe, Hokuto Nakata, Shouta Nakayama, Mayumi Ishizuka
Metals, 10, 4, 531, 531, MDPI AG, 20 Apr. 2020, [Peer-reviewed]
Scientific journal, Zinc plant leach residues (ZPLRs) contain significant amounts of metal compounds of lead (Pb), zinc (Zn), iron (Fe), etc., hence, they are considered as a secondary source of metals. On the other hand, ZPLRs are regarded as hazardous materials because they contain heavy metals that pollute the environment. Resources and environmental concerns of ZPLRs were addressed in this study by removing/recovering Pb and Zn using a concurrent dissolution and cementation technique. To cement the dissolved Pb and Zn in leaching pulp, zero-valent aluminum (ZVAl) was added during ZPLRs leaching in the hydrochloric (HCl)–sodium chloride (NaCl) solution. The resulting cemented metals were agglomerated and separated by sieving. Lead removal increased with increasing both NaCl and HCl concentrations. However, when ZVAl was added, significant Pb removal was achieved at a low concentration. Zinc was not cemented out of the pulp using ZVAl and its recovery from ZPLRs was dependent on the HCl concentration only. By applying a concurrent dissolution and cementation technique, both Pb and Zn were removed using a low concentration of NaCl, and most importantly Pb—the most toxic metal in ZPLRs—was captured and separated before the solid-liquid separation, hence, eliminating the need for extensive washing of the generated residues to remove the inherent residual solution.

Improved pyrolysis behavior of ammonium polyphosphate-melamine-expandable (APP-MEL-EG) intumescent fire retardant coating system using ceria and dolomite as additives for I-beam steel application
Joshua B. Zoleta, Gevelyn B. Itao, Vannie Joy T. Resabal, Arnold A. Lubguban, Ryan D. Corpuz, Mayumi Ito, Naoki Hiroyoshi, Carlito Baltazar Tabelin
Heliyon, 6, 1, Elsevier Ltd, 01 Jan. 2020, [Peer-reviewed]
English, Scientific journal

Enhanced cementation of gold via galvanic interactions using activated carbon and zero-valent aluminum: A novel approach to recover gold ions from ammonium thiosulfate medium
Sanghee Jeon, Carlito Baltazar Tabelin, Hirotaka Takahashi, Ilhwan Park, Mayumi Ito, Naoki Hiroyoshi
Hydrometallurgy, 191, Elsevier B.V., 01 Jan. 2020, [Peer-reviewed]
English, Scientific journal

Carrier-microencapsulation of arsenopyrite using Al-catecholate complex: nature of oxidation products, effects on anodic and cathodic reactions, and coating stability under simulated weathering conditions
Ilhwan Park, Carlito Baltazar Tabelin, Kensuke Seno, Sanghee Jeon, Hiroyuki Inano, Mayumi Ito, Naoki Hiroyoshi
Heliyon, 6, 1, e03189, e03189, Elsevier BV, Jan. 2020, [Peer-reviewed]
Scientific journal

Ammonium thiosulfate extraction of gold from printed circuit boards (PCBs) of end-of-life mobile phones and its recovery from pregnant leach solution by cementation
Sanghee Jeon, Carlito Baltazar Tabelin, Ilhwan Park, Yoshito Nagata, Mayumi Ito, Naoki Hiroyoshi
Hydrometallurgy, 191, 105214, 105214, Elsevier BV, Jan. 2020, [Peer-reviewed]
Scientific journal

Improvement of flotation and suppression of pyrite oxidation using phosphate-enhanced galvanic microencapsulation (GME) in a ball mill with steel ball media
Sophea Seng, Carlito Baltazar Tabelin, Yuta Makino, Monyneath Chea, Theerayut Phengsaart, Ilhwan Park, Naoki Hiroyoshi, Mayumi Ito
Minerals Engineering, 143, 01 Nov. 2019, [Peer-reviewed]

Development of advanced pyrite passivation strategies towards sustainable management of acid mine drainage
C. B. Tabelin, I. Park, X. Li, S. Seng, M. Villacorte-Tabelin, T. Igarashi, M. Ito, N. Hiroyoshi
IOP Conference Series: Earth and Environmental Science, 351, 1, Institute of Physics Publishing, 28 Oct. 2019, [Peer-reviewed]
English, International conference proceedings

Hematite-catalysed scorodite formation as a novel arsenic immobilisation strategy under ambient conditions
Tabelin Carlito Baltazar, Corpuz Ryan D, Iarashi Toshifumi, Villacorte-Tabelin Mylah, Ito Mayumi, Hiroyoshi Naoki
CHEMOSPHERE, 233, 946, 953, Oct. 2019, [Peer-reviewed]

Solidification of sand by Pb(II)-tolerant bacteria for capping mine waste to control metallic dust: Case of the abandoned Kabwe Mine, Zambia.
Wilson Mwandira, Kazunori Nakashima, Satoru Kawasaki, Mayumi Ito, Tsutomu Sato, Toshifumi Igarashi, Meki Chirwa, Kawawa Banda, Imasiku Nyambe, Shouta Nakayama, Hokuto Nakata, Mayumi Ishizuka
Chemosphere, 228, 17, 25, Aug. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal

Efficacy of biocementation of lead mine waste from the Kabwe Mine site evaluated using Pararhodobacter sp.
Wilson Mwandira, Kazunori Nakashima, Satoru Kawasaki, Mayumi Ito, Tsutomu Sato, Toshifumi Igarashi, Kawawa Banda, Meki Chirwa, Imasiku Nyambe, Shouta Nakayama, Mayumi Ishizuka
Environmental science and pollution research international, 26, 15, 15653, 15664, May 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, Biocementation of hazardous waste is used in reducing the mobility of contaminants, but studies on evaluating its efficacy have not been well documented. Therefore, to evaluate the efficacy of this method, physicochemical factors affecting stabilized hazardous products of in situ microbially induced calcium carbonate precipitation (MICP) were determined. The strength and leach resistance were investigated using the bacterium Pararhodobacter sp. Pb-contaminated kiln slag (KS) and leach plant residue (LPR) collected from Kabwe, Zambia, were investigated. Biocemented KS and KS/LPR had leachate Pb concentrations below the detection limit of < 0.001 mg/L, resisted slaking, and had maximum unconfined compressive strengths of 8 MPa for KS and 4 MPa for KS/LPR. Furthermore, biocemented KS and KS/LPR exhibited lower water absorption coefficient values, which could potentially reduce the water transportation of Pb2+. The results of this study show that MICP can reduce Pb2+ mobility in mine wastes. The improved physicochemical properties of the biocemented materials, therefore, indicates that this technique is an effective tool in stabilizing hazardous mine wastes and, consequently, preventing water and soil contamination.

Formation of surface protective coatings on arsenopyrite using Al-catecholate complex and its mode of inhibition of arsenopyrite oxidation
Park Ilhwan, Tabelin Carlito, Inano Hiroyuki, Seno Kensuke, Higuchi Kazuki, Ito Mayumi, Hiroyoshi Naoki
25TH REGIONAL SYMPOSIUM ON CHEMICAL ENGINEERING (RSCE 2018), 268, 2019, [Peer-reviewed]

Carrier-microencapsulation using Al-catecholate complex to suppress arsenopyrite oxidation: Evaluation of the coating stability under simulated weathering conditions
Seno Kensuke, Park Ilhwan, Tabelin Carlito, Magaribuchi Kagehiro, Ito Mayumi, Hiroyoshi Naoki
25TH REGIONAL SYMPOSIUM ON CHEMICAL ENGINEERING (RSCE 2018), 268, 2019, [Peer-reviewed]

CeO2-dolomite as fire retardant additives on the conventional intumescent coating in steel substrate for improved performance
Zoleta Joshua, Itao Gevelyn, Joy Resabal Vannie, Lubguban Arnold, Corpuz Ryan, Tabelin Carlito, Ito Mayumi, Hiroyoshi Naoki
25TH REGIONAL SYMPOSIUM ON CHEMICAL ENGINEERING (RSCE 2018), 268, 2019, [Peer-reviewed]

Improvement of hybrid jig separation efficiency using wetting agents for the recycling of mixed-plastic wastes
Mayumi Ito, Megumi Takeuchi, Ayumu Saito, Nana Murase, Theerayut Phengsaart, Carlito Baltazar Tabelin, Naoki Hiroyoshi, Masami Tsunekawa
Journal of Material Cycles and Waste Management, 01 Jan. 2019, [Peer-reviewed]

Development of suitable product recovery systems of continuous hybrid jig for plastic-plastic separation　　　　　　　　　　　　　　　
M. Ito, A. Saito, N. Murase, T. Phengsaart, S. Kimura, C.B. Tabelin, N. Hiroyoshi
Minerals Engineering, 2019, [Peer-reviewed]
English, Scientific journal

Galvanic Microencapsulation (GME) Using Zero-Valent Aluminum and Zero-Valent Iron to Suppress Pyrite Oxidation.　　　　　　　　　　　　　　　
S. Seng, C.B. Tabelin, M. Kojima, N. Hiroyoshi, M. Ito
Materials Transactions, 60, 277, 286, 2019, [Peer-reviewed]
English, Scientific journal

A review of recent strategies for acid mine drainage prevention and mine tailings recycling.　　　　　　　　　　　　　　　
I. Park, C.B. Tabelin, S. Jeon, X. Li, K. Seno, M. Ito, N. Hiroyoshi
Chemosphere, 219, 588, 606, 2019, [Peer-reviewed]
English, Scientific journal

Suppression of pyrite oxidation by ferric-catecholate complexes: An electrochemical study　　　　　　　　　　　　　　　
X. Li, M. Gao, N. Hiroyoshi, C.B. Tabelin, T. Taketsugu, M. Ito
Minerals Engineering, 138, 226, 237, 2019, [Peer-reviewed]
English, Scientific journal

Suppressive effects of ferric-catecholate complexes on pyrite oxidation　　　　　　　　　　　　　　　
X. Li, N. Hiroyoshi, C.B. Tabelin, K. Naruwa, C. Harada, M. Ito
Chemosphere, 214, 70, 78, 2019, [Peer-reviewed]
English, Scientific journal

A physical separation scheme to improve ammonium thiosulfate leaching of gold by separation of base metals in crushed mobile phones　　　　　　　　　　　　　　　
S. Jeon, M. Ito, C.B. Tabelin, R. Pongsumrankul, S. Tanaka, N. Kitajima, A. Saito, I. Park, N. Hiroyoshi
Minerals Engineering, 138, 168, 177, 2019, [Peer-reviewed]
English, Scientific journal

Simultaneous suppression of acid mine drainage formation and arsenic release by Carrier-microencapsulation using aluminum-catecholate complexes (vol 205C, pg 414, 2018)
Park Ilhwan, Tabelin Carlito Baltazar, Seno Kensuke, Jeon Sanghee, Ito Mayumi, Hiroyoshi Naoki
CHEMOSPHERE, 209, 1021, Oct. 2018, [Peer-reviewed]

Gold recovery from shredder light fraction of E-waste recycling plant by flotation-ammonium thiosulfate leaching
Sanghee Jeon, Mayumi Ito, Carlito Baltazar Tabelin, Rongrit Pongsumrankul, Naho Kitajima, llhwan Park, Naoki Hiroyoshi
Waste Management, 77, 195, 202, Elsevier Ltd, 01 Jul. 2018, [Peer-reviewed]
English, Scientific journal

Simultaneous suppression of acid mine drainage formation and arsenic release by Carrier-microencapsulation using aluminum-catecholate complexes　　　　　　　　　　　　　　　
I. Park, C.B. Tabelin, K. Seno, S. Jeon, M. Ito, N. Hiroyoshi
Chemosphere, 205, 414, 425, 2018, [Peer-reviewed]
English, Scientific journal

Suppression of the release of arsenic from arsenopyrite by carrier-microencapsulation using Ti-catechol complex　　　　　　　　　　　　　　　
I. Park, C.B. Tabelin, K. Magaribuchi, K. Seno, M. Ito, N. Hiroyoshi
Journal of Hazardous Materials, 344, 322, 332, 2018, [Peer-reviewed]
English, Scientific journal

Arsenic, selenium, boron, lead, cadmium, copper, and zinc in naturally contaminated rocks: A review of their sources, modes of enrichment, mechanisms of release, and mitigation strategies　　　　　　　　　　　　　　　
C.B. Tabelin, T. Igarashi, M. Villacorte-Tabelin, I. Park, E.M. Opiso, M. Ito, N. Hiroyoshi
Science of The Total Environment, 645, 1522, 1553, 2018, [Peer-reviewed]
English, Scientific journal

Interference of coexisting copper and aluminum on the ammonium thiosulfate leaching of gold from printed circuit boards of waste mobile phones　　　　　　　　　　　　　　　
S. Jeon, C.B. Tabelin, H. Takahashi, I. Park, M. Ito, N. Hiroyoshi
Waste Management, 81, 148, 156, 2018, [Peer-reviewed]
English, Scientific journal

Improvement of jig efficiency by shape separation, and a novel method to estimate the separation efficiency of metal wires in crushed electronic wastes using bending behavior and “entanglement factor”　　　　　　　　　　　　　　　
T. Phengsaart, M. Ito, N. Hamaya, C.B. Tabelin, N. Hiroyoshi
Minerals Engineering, 129, 54, 62, 2018, [Peer-reviewed]
English, Scientific journal

Simultaneous leaching of arsenite, arsenate, selenite and selenate, and their migration in tunnel-excavated sedimentary rocks: II. Kinetic and reactive transport modeling
Carlito Baltazar Tabelin, Ryosuke Sasaki, Toshifumi Igarashi, Ilhwan Park, Shuichi Tamoto, Takahiko Arima, Mayumi Ito, Naoki Hiroyoshi
CHEMOSPHERE, 188, 444, 454, Dec. 2017, [Peer-reviewed]
English, Scientific journal

Simultaneous leaching of arsenite, arsenate, selenite and selenate, and their migration in tunnel-excavated sedimentary rocks: I. Column experiments under intermittent and unsaturated flow
Carlito Baltazar Tabelin, Ryosuke Sasaki, Toshifumi Igarashi, Ilhwan Park, Shuichi Tamoto, Takahiko Arima, Mayumi Ito, Naoki Hiroyoshi
CHEMOSPHERE, 186, 558, 569, Nov. 2017, [Peer-reviewed]
English, Scientific journal

Pyrite oxidation in the presence of hematite and alumina: II. Effects on the cathodic and anodic half-cell reactions
Carlito Baltazar Tabelin, Suchol Veerawattananun, Mayumi Ito, Naoki Hiroyoshi, Toshifumi Igarashi
SCIENCE OF THE TOTAL ENVIRONMENT, 581, 126, 135, Mar. 2017, [Peer-reviewed]
English, Scientific journal

Pyrite oxidation in the presence of hematite and alumina: I. Batch leaching experiments and kinetic modeling calculations
Carlito Baltazar Tabelin, Suchol Veerawattananun, Mayumi Ito, Naoki Hiroyoshi, Toshifumi Igarashi
SCIENCE OF THE TOTAL ENVIRONMENT, 580, 687, 698, Feb. 2017, [Peer-reviewed]
English, Scientific journal

Formation of schwertmannite-like and scorodite-like coatings on pyrite and its implications in acid mine drainage control. In: E. Peek, M. Buarzaiga and J. Dutrizac, Eds., Iron Control – Practice and Research, (e-book). Quebec　　　　　　　　　　　　　　　
C.B. Tabelin, R.D. Corpuz, S. Veerawattananun, M. Ito, N. Hiroyoshi, T. Igarashi
Canadian Institute of Mining, Metallurgy and Petroleum, 133, 144, 2016, [Peer-reviewed]
English, Scientific journal

A Study on the Utilization of Magnetite for the Recovery of Platinum Group Metals from Chloride Solution
Peet Homchuen, Richard Diaz Alorro, Naoki Hiroyoshi, Ryo Sato, Hajime Kijitani, Mayumi Ito
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, 37, 4, 246, 254, 2016, [Peer-reviewed]
English, Scientific journal

Electrochemical Investigation of Gold Uptake From Chloride Solution by Magnetite
Richard Diaz Alorro, Naoki Hiroyoshi, Hajime Kijitani, Mayumi Ito, Masami Tsunekawa
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, 36, 5, 332, 339, Sep. 2015, [Peer-reviewed]
English, Scientific journal

Partial cloning of CYP2C23a genes and hepatic protein expression in eight representative avian species
K. P. Watanabe, Y. K. Kawai, S. M.M. Nakayama, Y. Ikenaka, H. Mizukawa, N. Takaesu, M. Ito, S. I. Ikushiro, T. Sakaki, M. Ishizuka
Journal of Veterinary Pharmacology and Therapeutics, 38, 2, 190, 195, Blackwell Publishing Ltd, 01 Apr. 2015, [Peer-reviewed]
English, Scientific journal

Short and long term release mechanisms of arsenic, selenium and boron from a tunnel-excavated sedimentary rock under in situ conditions
Shuichi Tamoto, Carlito Baltazar Tabelin, Toshifumi Igarashi, Mayumi Ito, Naoki Hiroyoshi
JOURNAL OF CONTAMINANT HYDROLOGY, 175, 60, 71, Apr. 2015, [Peer-reviewed]
English, Scientific journal

Stability of As(V)-sorbed schwertmannite under porphyry copper mine conditions
Sengpasith HoungAloune, Naoki Hiroyoshi, Mayumi Ito
MINERALS ENGINEERING, 74, 51, 59, Apr. 2015, [Peer-reviewed]
English, Scientific journal

Effect of Fe(II) and Cu(II) on transformation of schwertmannite to goethite　　　　　　　　　　　　　　　
S. Houngaloune, N. Hiroyoshi, M. Ito
International Journal of Chemical Engineering and Applications, 6, 1, 32, 37, 2015, [Peer-reviewed]
English, Scientific journal

Study on schwertmannite production from copper heap leach solutions and its efficiency in arsenic removal from acidic sulfate solutions
Sengpasith HoungAloune, Takahiro Kawaai, Naoki Hiroyoshi, Mayumi Ito
HYDROMETALLURGY, 147, 30, 40, Aug. 2014, [Peer-reviewed]
English, Scientific journal

Electrical disintegration and micro-focus X-ray CT observations of cement paste samples with dispersed mineral particles
Sang Ho Cho, Mitsuhiro Yokota, Mayumi Ito, Satoru Kawasaki, Soo Bok Jeong, Byoung Kon Kim, Katsuhiko Kaneko
MINERALS ENGINEERING, 57, 79, 85, Mar. 2014, [Peer-reviewed]
English, Scientific journal

Technological development in jig separation and approaches to adovance in separation　　　　　　　　　　　　　　　
M Tsunekawa, M Ito, N Hiroyoshi
Journal of MMIJ, 129, 284, 289, 2013, [Peer-reviewed]
Japanese, Scientific journal

A method for determining optimum water pulsation parameter in jig separatiin using pressure and level sensors and its application to separation of fine particles　　　　　　　　　　　　　　　
M Tusnekawa, J Akimoto, W Ogiko, S Ochi, N Hiroyoshi, M Ito
Journal of MMIJ, 129, 284, 289, 2013, [Peer-reviewed]
Japanese, Scientific journal

Newly developed discharge device for jig separation of plastics to recover higher grade bottom layer product
Masami Tsunekawa, Riki Kobayashi, Kunihiro Hori, Hideaki Okada, Naka Abe, Naoki Hiroyoshi, Mayumi Ito
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 114, 27, 29, Nov. 2012, [Peer-reviewed]
English, Scientific journal

Effect of particle shape on hydrocyclone classification
Kouki Kashiwaya, Takahiko Noumachi, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
POWDER TECHNOLOGY, 226, 147, 156, Aug. 2012, [Peer-reviewed]
English, Scientific journal

Effect of water addition on centrifugal treatment to remove lead compounds from polyvinylchloride in electric wires and cables
Masami Tsunekawa, Mayumi Ito, Yoshiaki Nakamura, Yuta Sasaki, Tomoo Sakai, Naoki Hiroyoshi
SEPARATION AND PURIFICATION TECHNOLOGY, 89, 94, 97, Mar. 2012, [Peer-reviewed]
English, Scientific journal

SUPPRESSION OF PYRITE OXIDATION BY CARRIER MICROENCAPSULATION USING SILICON AND CATECHOL
Rani Kumari Thakur Jha, Jacqueline Satur, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, 33, 2, 89, 98, 2012, [Peer-reviewed]
English, Scientific journal

Jig separation of crushed automobile shredded residue and its evaluation by float and sink analysis
Yutaka Kuwayama, Mayumi Ito, Noki Hiroyoshi, Masami Tsunekawa
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 13, 3, 240, 246, Oct. 2011, [Peer-reviewed]
English, Scientific journal

Evaluation of entanglement properties of crushed automobile shredded residue and detachment of entrapped particles
Yutaka Kuwayama, Mayumi Ito, Maiko Akatsuka, Naoki Hiroyoshi, Masami Tsunekawa
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 13, 2, 156, 163, Aug. 2011, [Peer-reviewed]
English, Scientific journal

Removal of lead compounds from polyvinylchloride in electric wires and cables using cation-exchange resin
Masami Tsunekawa, Mayumi Ito, Yuta Sasaki, Tomoo Sakai, Naoki Hiroyoshi
JOURNAL OF HAZARDOUS MATERIALS, 191, 1-3, 388, 392, Jul. 2011, [Peer-reviewed]
English, Scientific journal

Removal of lead compounds from polyvinylchloride in electric wires and cables using cation-exchange resin
Masami Tsunekawa, Mayumi Ito, Yuta Sasaki, Tomoo Sakai, Naoki Hiroyoshi
JOURNAL OF HAZARDOUS MATERIALS, 191, 1-3, 388, 392, Jul. 2011, [Peer-reviewed]
English, Scientific journal

Suppression of floatability of pyrite in coal processing by carrier microencapsulation
Rani Kumari Thakur Jha, Jacqueline Satur, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
FUEL PROCESSING TECHNOLOGY, 92, 5, 1032, 1036, May 2011, [Peer-reviewed]
English, Scientific journal

Estimating the size distribution of anode and cathode activating agents in the crushed products of nickel metal hydride batteries from hybrid vehicles and its classification
Mayumi Ito, Kouki Kashiwaya, Naohiro Sumiya, Hisatoshi Furuya, Naoki Hiroyoshi, Masami Tsunekawa
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 97, 1-4, 92, 95, Nov. 2010, [Peer-reviewed]
English, Scientific journal

Reverse jig separation of shredded floating plastics separation of polypropylene and high density polyethylene
Mayumi Ito, Masami Tsunekawa, Emi Ishida, Koki Kawai, Tatsuru Takahashi, Naka Abe, Naoki Hiroyoshi
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 97, 1-4, 96, 99, Nov. 2010, [Peer-reviewed]
English, Scientific journal

Effect of chloride ions on leaching rate of chalcopyrite
Kyoungkeun Yoo, Soo-kyung Kim, Jae-chun Lee, Mayumi Ito, Masami Tsunekawa, Naoki Hiroyoshi
MINERALS ENGINEERING, 23, 6, 471, 477, May 2010, [Peer-reviewed]
English, Scientific journal

On the Use of Magnetite for Gold Recovery From Chloride Solution
Richard Diaz Alorro, Naoki Hiroyoshi, Hajime Kijitani, Mayumi Ito, Masami Tsunekawa
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, 31, 4, 201, 213, 2010, [Peer-reviewed]
English, Scientific journal

Development of a New Gravity Separator for Plastics -a Hybrid-Jig
Kunihiro Hori, Masami Tsunekawa, Masatsune Ueda, Naoki Hiroyoshi, Mayumi Ito, Hideaki Okada
MATERIALS TRANSACTIONS, 50, 12, 2844, 2847, Dec. 2009, [Peer-reviewed]
English, Scientific journal

Anode activating agent recovery by magnetic separation from the < 0.075 mm fraction of crushed nickel metal hydride batteries from hybrid vehicles
Mayumi Ito, Kouki Kashiwaya, Naohiro Sumiya, Naoki Hiroyoshi, Masami Tsunekawa
SEPARATION AND PURIFICATION TECHNOLOGY, 69, 2, 149, 152, Sep. 2009, [Peer-reviewed]
English, Scientific journal

Optimum water pulsation of jig separation for crushed plastic particles
Kunihiro Hori, Masami Tsunekawa, Naoki Hiroyoshi, Mayumi Ito
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 92, 3-4, 103, 108, Aug. 2009, [Peer-reviewed]
English, Scientific journal

Experimental study of coal liberation: Electrical disintegration versus roll-crusher comminution
M. Ito, S. Owada, T. Nishimura, T. Ota
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 92, 1-2, 7, 14, Jul. 2009, [Peer-reviewed]
English, Scientific journal

Recovery of heavy metals from MSW molten fly ash by CIP method
Richard Diaz Alorro, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
HYDROMETALLURGY, 97, 1-2, 8, 14, Jun. 2009, [Peer-reviewed]
English, Scientific journal

Removal of Trace Impurity from Limestone Using Flotation Techniques
Masami Tsunekawa, Yugo Honma, Kyoungkeun Yoo, Naoki Hiroyoshi, Mayumi Ito
MATERIALS TRANSACTIONS, 50, 1, 171, 176, Jan. 2009, [Peer-reviewed]
English, Scientific journal

Recent Developments in Advanced Coal Cleaning
ITO Mayumi
Journal of MMIJ, 124, 12, 865, 870, The Mining and Materials Processing Institute of Japan, 25 Dec. 2008
Japanese, The rise in demand for coal due to growth in Asia is inducing coal price increases and it will be necessary to develop cleaning method for difficult-to-treat coal. High-efficiency power generation techniques are required to reduce greenhouse gas emissions and it is necessary to reduce ash content of coal significantly before combustion. Advanced coal cleaning techniques can generate low ash coals and this paper reviews recent applications of low ash coal, recent developments in commercial scale and lab scale flotation, and research results of enhanced gravity separators and comminution.

Recovery of heavy metals from MSW molten fly ash by carrier-in-pulp method: Fe powder as carrier
Richard Diaz Alorro, Shinichi Mitani, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
MINERALS ENGINEERING, 21, 15, 1094, 1101, Dec. 2008, [Peer-reviewed]
English, Scientific journal

Carrier-microencapsulation using Si-catechol complex for suppressing pyrite floatability
Rani Kumari Thakur Jha, Jacqueline Satur, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
MINERALS ENGINEERING, 21, 12-14, 889, 893, Nov. 2008, [Peer-reviewed]
English, Scientific journal

Immersion Behavior of Automobile Shredded Residue in Surfactant Solutions and Detachment of Particulate Matter
Mayurni Ito, Maiko Akatsuka, Yutaka Kuwayama, Kunihiro Hori, Naoki Hiroyoshi, Masami Tsunekawa
MATERIALS TRANSACTIONS, 49, 10, 2371, 2376, Oct. 2008, [Peer-reviewed]
English, Scientific journal

Engineering Education for All University First Year Students Using Playing in the Sand and Blowing Soap Bubbles
TSUNEKAWA Masami, HIROYOSHI Naoki, ITO Mayumi, HIRAJIMA Tsuyoshi
Journal of JSEE, 56, 5, 111, 114, Japanese Society for Engineering Education, 20 Sep. 2008
Japanese, Hokkaido University holds first year student seminars for promoting student ability in communication, presentation, design, and creativity. The authors have held this seminar to students of all faculties, where the research topics were determined by the students themselves from the phenomena or questions relating to children′s games such as playing in the sand and blowing soap bubbles. Then, they planned experimental procedures, discussed, summarized, and presented the results with minimal advice from teachers. After the student presentations the teachers introduced the techniques and equip...

Dispersion-Flocculation Behavior of Fine Lead Particles in an Organic Solvent
Masami Tsunekawa, Yuta Sasaki, Yoshiaki Nakamura, Mayumi Ito, Naoki Hiroyoshi, Kyoung Keun Yoo
MATERIALS TRANSACTIONS, 49, 9, 2119, 2123, Sep. 2008, [Peer-reviewed]
English, Scientific journal

Estimation of degree of liberation in a coarse crushed product of cobalt-rich ferromanganese crust/nodules and its gravity separation
Mayumi Ito, Masami Tsunekawa, Eiji Yamaguchi, Kengo Sekimura, Kouki Kashiwaya, Kunihiro Hori, Naoki Hiroyoshi
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 87, 3-4, 100, 105, Jul. 2008, [Peer-reviewed]
English, Scientific journal

Carrier-microencapsulation for preventing pyrite oxidation
Jacqueline Satur, Naoki Hiroyoshi, Masami Tsunekawa, Mayumi Ito, Hideyuki Okamoto
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 83, 3-4, 116, 124, Sep. 2007, [Peer-reviewed]
English, Scientific journal

The recovery of electrode compounds from waste nickel metal hydride batteries by physical separation techniques
Masami Tsunekawa, Mayumi Ito, Hisatoshi Furuya, Naoki Hiroyoshi
MATERIALS TRANSACTIONS, 48, 5, 1089, 1094, May 2007, [Peer-reviewed]
English, Scientific journal

Recent Developments in plastic-plastic separation techniques
ITO Mayumi, TSUNEKAWA Masami
Shigen-to-Sozai, 122, 4/5, 142, 149, The Mining and Materials Processing Institute of Japan, 25 May 2006
Japanese, As the earth has a finite amount of resources, resource-saving is important to maintain an affluent life. In Japan various types of Recycling Laws were implemented to promote a recycling-oriented society, and packaging materials, home appliance, automobile and personal computer are collected and treated for recycling. Waste plastics are utilized for substitute for blast furnace coke or fuel and also they are recycled as plastic materials. Developing advanced separation techniques which can treat the waste plastics at low cost and get high grade plastics are required to recycle the plastics ...

Technological Developments in Wet Gravity Separation Processes
TSUNEKAWA Masami, HORI Kunihiro, HIROYOSHI Naoki, ITO Mayumi
Shigen-to-Sozai, 121, 10/11, 467, 473, The Mining and Materials Processing Institute of Japan, 25 Nov. 2005
Japanese, Gravity separation is one of the ancient technologies for mineral processing and is still in widespread use. In recent years, many kinds of machinery for wet gravity separation have been developed and applied to process fine particles and solid waste.<BR>The authors have reviewed newly developed machineries, in addition to the principle of wet gravity separation and conventional machineries. Most of them are conducted in gravitational fields or films of flowing water. The former harnesses the settling behavior of particles in water and the later the movement of particles in films of flowi...

Proposal and Experimental Validation of New Liberation Model Considering Preferential Breakage at Phase Boundaries
OWADA Shuji, ITO Mayumi, NARAKI Ken, TAKEDA Kuniyoshi, KUROKAWA Kazushige, OHMIYA Takayuki
Shigen-to-Sozai, 121, 1, 28, 33, The Mining and Materials Processing Institute of Japan, 25 Jan. 2005
Japanese, This paper describes a new liberation model considering preferential breakage at phase boundaries to make a predicted degree of liberation to be feasible. This model is a modification of the Wiegel model, which is one of the most popular and widely acceptable models, introducing an index of "Preferential Breakage Probability, e" at phase boundaries. Concept, structure, simulation results, and validation of the model were shown in this paper, including the results of applicability for various kinds of natural and synthetic composite materials. This index of "Preferential Breakage Probabili...

The Role of Mineral Processing Technology in a Society Based on Recycling
Masami Tsunekawa, Kyoungkeun Yoo, Naoki Hiroyoshi, Mayumi Ito
Resources Processing, 52, 1, 32, 38, 2005
English, Scientific journal

静電選別の原理とリサイクリングへの応用 (特集 資源処理と廃棄物処理に貢献する固体ハンドリング技術)
伊藤 真由美, 大和田 秀二
粉体と工業, 35, 5, 40, 52, 粉体と工業社, May 2003
Japanese

資源処理と廃棄物処理に貢献する固体ハンドリング技術 静電選別の原理とリサイクリングへの応用
伊藤真由美, 大和田秀二
粉体と工業, 35, 5, 40, 52, 粉体と工業社, 01 May 2003
Japanese

Iron Dissolution Behavior from High Sulfur Refuse and Flotation of High Sulfur Coal in the Leachate of the Refuse
ITO Mayumi, TSUNEKAWA Masami, HIRAJIMA Tsuyoshi, HIROYOSHI Naoki, YAMADA Ryuichi, YUKAWA Kentaro
Shigen-to-Sozai, 117, 12, 961, 966, The Mining and Materials Processing Institute of Japan, 25 Dec. 2001
Japanese, The effects of inhibitors to iron-oxidizing bacteria (Thiobacillus ferrooxidans) on the dissolution of iron species from high sulfur coal refuse (5.75 db% S) were studied in acidic solutions with the bacteria, using sodium lauryl sulfate (SDS) and tannic acid as inhibitors. Flotation experiments of high sulfur coal (4.27 dafb% S) in leachates from the refuse were conducted to remove sulfur.<BR>Compared with tannic acid, SDS inhibited the iron-oxidizing activity of Thiobacillus ferrooxidans more and dissolution of pyrite in high sulfur coal refuse, but SDS did not prevent dissolution of solu...

Basic Study on Separation of Pyrite from Coal by Flotation Using Ferric Solution
ITO Mayumi, TSUNEKAWA Masami, HIRAJIMA Tsuyoshi, HIROYOSHI Naoki, YUKAWA Kentaro
Shigen-to-Sozai, 115, 10, 737, 742, The Mining and Materials Processing Institute of Japan, 25 Oct. 1999
Japanese, Flotation behavior of coal and pyrite was investigated by bubble pick-up tests and Hallimond tube flotation. Flotation recovery of coal and pyrite was high in the acidic region and decreased with increasing pH. In solutions containing iron species the recovery of pyrite decreased drastically at pHs where iron hydroxide was precipitated, but coal flotation was not influenced. Zeta potentials of pyrite and iron hydroxide precipitates were measured under various conditions and the formed precipitates were characterized by XRD, FTIR, and settling velocity measurements. The precipitates formed a...

A Method to Characterize Flotation Performance of Fine Coal and Estimate its Liberation
TSUNEKAWA Masami, KON Yukitada, ITO Mayumi, HIRAJIMA Tsuyoshi, HIROYOSHI Naoki
Shigen-to-Sozai, 114, 6, 421, 425, The Mining and Materials Processing Institute of Japan, 25 Jun. 1998
Japanese, The authors have developed a new method to evaluate coal flotation behavior. The liberation degree of mineral matter in feed and the ultimate ash content of froth product can be estimated using this method. Modified release analysis and oil agglomeration tests were carried out using different feed size of coal. The results were plotted on combustible recovery vs. ash content of clean coal curves and on combustible (or mineral matter) recovery vs. yield curves. Graphic analysis of these curves is proposed to give the ultimate ash content of coal concentrate obtained under ideal conditions an...

Simple and Rapid Cell Growth Estimation Method for Thiobacillus ferrooxidans and the Growth Rate in the Presence of Polyoxyethylenes
HIROYOSHI Naoki, ITO Mayumi, TSUNEKAWA Masami, HIRAJIMA Tsuyoshi
Journal of the Mining and Materials Processing Institute of Japan, 112, 3, 171, 175, 資源・素材学会, 25 Mar. 1996
Japanese

Enhancement in Bacterial Leaching of Chalcopyrite by Polyoxyethylene Sorbitan Monolaurate Addition
Hiroyoshi N, Nakamura T, Tsunekawa M, Hirajima T, Ito M
Journal of Mineral and Mateial Processing Institute of Japan, 111, 13, 943, 948, 資源・素材学会, 1995, [Peer-reviewed]
English

Concurrent treatment combining extraction and cementation of anglesite for depression of sphalerite floatability
相川公政, 伊藤真由美, 草野敦大, JEON Sanghee, PARK Ilhwan, 広吉直樹, 資源・素材(Web), 2021, 2021

Effects of pyrite on the floatability of lead-activated sphalerite in flotation
相川公政, 瀬川達也, JEON Sanghee, PARK Ilhwan, TABELIN Carlito, TABELIN Carlito, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会(Web), 2020, 2020

鉛イオンで活性化された閃亜鉛鉱の浮遊性に及ぼす亜硫酸ナトリウムの影響
草野敦大, 相川公政, JEON Sanghee, PARK Ilhwan, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会(Web), 2020, 2020

銅・亜鉛硫化鉱の浮選における閃亜鉛鉱の浮遊抑制
折井のどか, 相川公政, JEON Sanghee, PARK Ilhwan, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会(Web), 2020, 2020

Effects of several depressants on the floatability of sphalerite in the flotation of copper-zinc sulfides
伊藤真由美, 折井のどか, 相川公政, JEON Sanghee, PARK Ilhwan, 広吉直樹, MAGWANENG Refilwe, 工藤賢太郎, 砂田和也, 高橋達, 資源・素材(Web), 2020, 2020

Effects of lead ion and sodium sulfite concentrations on sphalerite flotation
伊藤真由美, 草野敦大, 相川公政, JEON Sanghee, PARK Ilhwan, 広吉直樹, 資源・素材(Web), 2020, 2020

Effects of physical separation as a pretreatment for ammonium thiosulfate leaching of gold from waste mobile phones
Jeon, M. Ito, R. Pongsumrankul, S. Tanaka, N. Kitajima, C. B. Tabelin, N. Hiroyoshi, IMPC 2018 - 29th International Mineral Processing Congress, 3790, 3798, 01 Jan. 2019

複雑硫化鉱浮選における閃亜鉛鉱の浮遊性低下のメカニズム
相川公政, 瀬川達也, 得田敦博, TABELIN Carlito, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会(Web), 2019, 2019

鉛で活性化された閃亜鉛鉱の浮遊性に及ぼすガルバニック相互作用の影響
伊藤真由美, 相川公政, 瀬川達也, JEON Sanghee, PARK Ilhwan, TABELIN Carlito, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2019, 2019

Prediction of acid mine drainage formation and zinc migration in the tailings dam of a closed mine, and possible countermeasures
Tabelin Carlito, Sasaki Asuka, Igarashi Toshifumi, Tomiyama Shingo, Villacorte-Tabelin Mylah, Ito Mayumi, Hiroyoshi Naoki, 25TH REGIONAL SYMPOSIUM ON CHEMICAL ENGINEERING (RSCE 2018), 268, 2019, [Peer-reviewed]

The characterization of crushed printed circuit boards of waste mobile phone and recovery of gold components by hybrid-jig separation　　　　　　　　　　　　　　　
S. Jeon, M. Ito, S. Tanaka, N. Kitajima, C.B. Tabelin, N. Hiroyoshi, Proc. of the 17th Global Joint Seminar on Geo-environmental Engineering,, 192, 197, 2018
English, Summary international conference

Suppression of the release of arsenic from arsenopyrite by titanium- and aluminum-based carrier-microencapsulation　　　　　　　　　　　　　　　
I. Park, C.B. Tabelin, K. Seno, K. Magaribuchi, M. Ito, N. Hiroyoshi, Proc. of the 17th Global Joint Seminar on Geo-environmental Engineering,, 305, 311, 2018
English, Summary international conference

Comparison of electrochemical properties of various metal-catecholate complexes for carrier-microencapsulation　　　　　　　　　　　　　　　
X. Li, C. Harada, I. Park, N. Hiroyoshi, C.B. Tabelin, M. Ito, Proc. of the 17th Global Joint Seminar on Geo-environmental Engineering,, 344, 348, 2018
English, Summary international conference

The roles of soluble phases in the release of geogenic arsenic and selenium from tunnel-excavated rocks of marine origin　　　　　　　　　　　　　　　
C.B. Tabelin, R. Sasaki, T. Igarashi, I. Park, S. Tamoto, T. Arima, M. Ito, N. Hiroyoshi, Proc. of the 17th Global Joint Seminar on Geo-environmental Engineering,, 312, 319, 2018
English, Summary international conference

The effects of particle geometrical properties on the settling velocity of plastic particles in jig separation　　　　　　　　　　　　　　　
T. Phengsaart, A. Azuma, M. Ito, D. Kitayama, S. Kimura, C.B. Tabelin, N. Hiroyoshi, Mining in Asia International Symposium, Bandung, Indonesia, 2018
English, Summary international conference

Improvement of bottom product purity in a continuous jig using a restraining wall　　　　　　　　　　　　　　　
T. Phengsaart, M. Ito, A. Azuma, S. Kimura, K. Hori, H. Tanno, C.B. Tabelin, N. Hiroyoshi, Mining in Asia International Symposium, Bandung, Indonesia, 2018
Japanese, Summary international conference

Effects of iron-catecholate complexes on pyrite oxidation.　　　　　　　　　　　　　　　
X. Li, N. Hiroyoshi, K. Naruwa, C. Harada, C.B. Tabelin, M. Ito, The 6th Joint Seminar on Geo-environment Engineering and Recycling (GER 2018), 2018
English, Summary international conference

Recent advances in jig separation technologies for resources recycling　　　　　　　　　　　　　　　
T. Phengsaart, M. Ito, S. Jeon, A. Azuma, D. Kitayama, S. Kimura, C.B. Tabelin, N. Hiroyoshi, The 6th Joint Seminar on Geo-environment Engineering and Recycling (GER 2018), 2018
English, Summary international conference

Characterization of zinc leaching residue in Kabwe area, Zambia.　　　　　　　　　　　　　　　
M. Silwamba, M. Ito, T. Fukushima, S. Takakuwa, K. Minatogawa, C.B. Tabelin, N. Hiroyoshi, M. Chirwa, K.E. Banda, I. Nyambe, Proc. of 2nd International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, Lusaka, Zambia, 2018
English, Summary international conference

Decontamination of zinc leach plant residues: recovery of extracted lead in leach pulp by cementation on ZVI　　　　　　　　　　　　　　　
M. Silwamba, M. Ito, T. Fukushima, C.B. Tabelin, S. Takakuwa, N. Hiroyoshi, M. Chirwa, K.E. Banda, I. Nyambe, Proc. of 2nd International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, Lusaka, Zambia, 2018
English, Summary international conference

Characterization of Khalzan Burgedei peralkaline rare earth deposit, Mongolia and a, Mongolia　　　　　　　　　　　　　　　
ITO Mayumi, G. Purevdelger, M. Ito, N. Sato, C.B. Tabelin, T. Otake, N. Hiroyoshi, J. Sereenen, 24, 29, 2018
English, Summary international conference

he effects of geometrical properties of particles on recycling treatment by physical separation techniques: A review　　　　　　　　　　　　　　　
T. Phengsaart, M. Ito, N. Kitajima, A. Azuma, C.B. Tabelin, N. Hiroyoshi, Proceedings of the 10th AUN/SEED-net Regional Conference on Geo-Resource and Geological Engineering, 446, 459, 2017
English, Summary international conference

Effects of metal ions on flotation of sulfide minerals　　　　　　　　　　　　　　　
M. Ito, A. Tokuda, T. Segawa, T Horiguchi, C.B. Tabelin, N. Hiroyoshi, Proceedings of International Symposium on Earth Resources and Management, 2017
English, Summary international conference

Electrochemical studies of chalcopyrite dissolution in acidic chloride solutions　　　　　　　　　　　　　　　
T.T. Nguyen, S. Tsuji, C.B. Tabelin, M. Ito, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 3, 6, 2017
English, Summary international conference

Distribution of different metals in gravity separation of printed circuit boards from mobile phones using jig separator and Knelson concentrator　　　　　　　　　　　　　　　
S. Tanaka, S. Jeon, N. Kitajima, C.B. Tabelin, N. Hiroyoshi, M. Ito, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 23, 28, 2017
English, Summary international conference

Carrier-microencapsulation using Al-catechol complex for suppressing arsenic release from arsenopyrite　　　　　　　　　　　　　　　
I. Park, K. Seno, K. Magaribuchi, C.B. Tabelin, M. Ito, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 10, 15, 2017
English, Summary international conference

Redox properties of metal complexes with catechol and its derivatives　　　　　　　　　　　　　　　
X. Li, K. Naruwa, C.B. Tabelin, M. Ito, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 4, 9, 2017
English, Summary international conference

Effects of mechanochemical treatment on the stability of arsenic-loaded schwertmannite　　　　　　　　　　　　　　　
Y. Takeuchi, N. Hiroyoshi, R.D. Alorro, M. Ito, C.B. Tabelin, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 16, 21, 2017
English, Summary international conference

Effects of zinc ions and their precipitates on flotation of sulfide minerals under alkaline condition　　　　　　　　　　　　　　　
A. Tokuda, M. Ito, T. Segawa, T. Horiguchi, C.B. Tabelin, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 2, 4, 2017
English, Summary international conference

Synergistic effects of aluminum and other conductive particles on the cementation of gold ions from ammonium thiosulfate solutions　　　　　　　　　　　　　　　
S. Jeon, H. Takahashi, R. Ponsumrankul, S. Tanaka, C.B. Tabelin, M. Ito, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 183, 186, 2017
English, Summary international conference

Effects of flatness ratio on the jig separation of crushed plastic particles　　　　　　　　　　　　　　　
T. Phengsaart, A. Azuma, C.B. Tabelin, N. Hiroyoshi, M. Ito, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 10, 14, 2017
English, Summary international conference

Kinetic modeling of agglomeration-flotation of finely ground chalcopyrite　　　　　　　　　　　　　　　
V. Hornn, R. Yamazawa, C.B. Tabelin, N. Hiroyoshi, Y. Imaizumi, M. Ito, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 51, 56, 2017
English, Summary international conference

A review of heterocoagulation and galvanic interaction of sulfide minerals　　　　　　　　　　　　　　　
S. Seng, M. Motoya, Y. Kontani, C.B. Tabelin, M. Ito, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 40, 45, 2017
English, Summary international conference

Enhanced passivation of pyrite in phosphate solution using ferric-catechol complex and zero-valent iron　　　　　　　　　　　　　　　
C.B. Tabelin, X. Li, S. Seng, M. Kojima, T. Igarashi, M. Ito, N. Hiroyoshi, the 14th International Symposium on East Asian Resources Recycling Technology and the Mining and Materials Processing Institute of Japan Fall Meeting, 8, 13, 2017
English, Summary international conference

Heterocoagulation anf galvanic interaction in mineral processing: A review.　　　　　　　　　　　　　　　
S. Seng, C.B. Tabelin, M. Kojima, Y. Kontani, M. Ito, N. Hiroyoshi, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 32, 2017
English, Summary international conference

Recovery of gold ions from ammonium thiosulfate solution by aluminum and other conductive particles　　　　　　　　　　　　　　　
S. Jeon, T. H. Takahashi, R. Pongsumrankul, S. Tanaka, C.B. Tabelin, M. Ito, N. Hiroyoshi, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 32, 2017
English, Summary international conference

Suppressive effects of aluminum-catechol complexes on the release of arsenic from arsenopyrite　　　　　　　　　　　　　　　
I. Park, K. Seno, K. Magaribuchi, C.B. Tabelin, M. Ito, N. Hiroyoshi, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 31, 2017
English, Summary international conference

Characterization of zinc contaminated mine waste in Kabwe area, Zambia　　　　　　　　　　　　　　　
M. Ito, T. Fukushima, S. Takakuwa, K. Minatogawa, C.B. Tabelin, N. Hiroyoshi, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 29, 2017
English, Summary international conference

Effects of additional organic functional groups on the redox properties of metal-catecholate complexes　　　　　　　　　　　　　　　
X. Li, K. Naruwa, C.B. Tabelin, M. Ito, N. Hiroyoshi, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 28, 2017
English, Summary international conference

Effects of particle size and shape during jig separation　　　　　　　　　　　　　　　
T. Phengsaart, M. Ito, A. Azuma, C.B. Tabelin, N. Hiroyoshi, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 27, 2017
English, Summary international conference

Advanced separation techniques for coarse size fraction of cesium-contaminated soil: Effects of soil particle morphology of soil washing.
M. Ito, S. Takakuwa, K. Minatogawa, C.B. Tabelin, N. Hiroyoshi, Y. Tomida, Proceedings of 1st International Kabwe Mine Pollution Amelioration Initiative (KAMPAI) Symposium, 23, 26, 529, 2017
[地盤工学会], English, Summary international conference

Gravity separation and its application in coal cleaning and resources recycling: A review　　　　　　　　　　　　　　　
T. Phengsaart, M. Ito, C.B. Tabelin, G.C. Eliseo, Y. Makino, A. Azuma, N. Hiroyoshi, Proceedings of Coal Mining and Utilization for Sustainable Development International Conference, Chiang Mai, Thailand, 301, 308, 2017
English, Summary international conference

Development of gold recovery method from ammonium thiosulfate solution using aluminum and activated carbon　　　　　　　　　　　　　　　
S. Jeon, H. Takahashi, C.B. Tabelin, M. Ito, N. Hiroyoshi, Proceedings of International Symposium on Earth Science and Technology, 608, 610, 2017
English, Summary international conference

Redox potential dependence of chalcopyrite leaching in ferric-chloride solution: Effects of temperature and solution composition　　　　　　　　　　　　　　　
N. Hiroyoshi, S. Tsuji, T.T. Nguyen, M. Ito, C.B. Tabelin, Proceedings of International Symposium on Earth Science and Technology, 615, 618, 2017
English, Summary international conference

Effects of aluminum-catechol complexes on pyrite oxidation　　　　　　　　　　　　　　　
I. Park, C.B. Tabelin, K. Seno, K. Magaribuchi, M. Ito, N. Hiroyoshi, Proceedings of International Symposium on Earth Science and Technology, 611, 614, 2017
English, Summary international conference

Suppression of pyrite oxidation using zero-valent iron powder　　　　　　　　　　　　　　　
S. Seng, C.B. Tabelin, M. Kojima, Y. Kontani, M. Ito, N. Hiroyoshi, Proceedings of International Symposium on Earth Science and Technology,, 619, 622, 2017
English, Summary international conference

Synergistic effects of calcium ion and anionic flocculants on coal flotation　　　　　　　　　　　　　　　
M. Ito, Y. Makino, G.C. Eliseu, C.B. Tabelin, N. Hiroyoshi, Proceedings of International Symposium on Earth Science and Technology, 623, 626, 2017
English, Summary international conference

Attachment of iron oxyhydroxides on pyrite and its effects on pyrite oxidation　　　　　　　　　　　　　　　
S. Seng, C.B. Tabelin, Y. Kontani, M. Kojima, M. Ito, N. Hiroyoshi, Proceedings of International Symposium on Earth Science and Technology, 600, 604, 2017
English, Summary international conference

Characterization of rare earth ore from Khaldzan Burgedei Peralkaline Deposit and its beneficiation by magnetic separation　　　　　　　　　　　　　　　
M. Ito, P. Galtchandmani, N. Sato, C.B. Tabelin, T. Otake, N. Hiroyoshi, Proceedings of International Symposium on Earth Science and Technology, 98, 199, 2017
English, Summary international conference

Advanced soil washing of coarse size fraction containing cesium : Removal of vermiculite by magnetic separation
伊藤 真由美, 湊川 和貴, Tabelin Carlito Baltazar, 広吉 直樹, 地下水・土壌汚染とその防止対策に関する研究集会講演集, 22, 389, 391, 23 Jun. 2016
[地盤工学会], Japanese

Recent Studies in Laboratory of Mineral Processing and Resources Recycling in Hokkaido University : Applications of Carrier Microencapsulation for Preventing Acid Mine Drainage Formation and Pyrite Flotation in Coal Cleaning
広吉 直樹, 伊藤 真由美, Tabelin Carlito Baltazar, 環境資源工学 = Resources processing : 資源処理技術, 63, 2, 61, 64, 2016
環境資源工学会, Japanese

Electrochemical insights on pyrite dissolution in the presence of alumina　　　　　　　　　　　　　　　
S. Veerawattananun, D. Wiwattanadate, C.B. Tabelin, M. Ito, N. Hiroyoshi, T. Igarashi, the 9th International Conference on Earth Resources Technology, 906, 917, 2016
English, Summary international conference

Suppression of arsenopyrite oxidation by carrier microencapsulation using Ti-catechol complex.　　　　　　　　　　　　　　　
I. Park, K. Magaribuchi, S. Veerawattananum, C.B. Tabelin, M. Ito, N. Hiroyoshi, T. Igarashi, the 9th International Conference on Earth Resources Technology,, 918, 928, 2016
English, Summary international conference

Recovery methods for valuable metals from used printed circuit boards: A review.　　　　　　　　　　　　　　　
S. Jeon, M. Ito, Y. Nagata, N. Kitajima, S. Tanaka, R. Pongsumrankul, T. Yamamoto, C.B. Tabelin, N. Hiroyoshi, the 9th International Conference on Earth Resources Technology, 564, 579, 2016
English, Summary international conference

A review of approaches to enhance sulfide-fines recovery by flotation　　　　　　　　　　　　　　　
V. Hornn, M. Ito, M. Kameya, T. Segawa, R. Yamazawa, C.B. Tabelin, N. Hiroyoshi, the 9th International Conference on Earth Resources Technology, 461, 473, 2016
English, Summary international conference

Fundamental electrochemical studies of carrier micro-encapsulation on pyrite: The stability of metal-organic complexes　　　　　　　　　　　　　　　
S. Veerawattananun, D. Wiwattanadate, C.B. Tabelin, M. Ito, N. Hiroyoshi, T. Igarashi, Proceedings of the 15th Japan-Korea-France-Canada Joint Seminar on Geo-environmental Engineering,, 141, 150, 2016
English, Summary international conference

The interplay between pyrite and hematite and its implications in acid mine drainage control　　　　　　　　　　　　　　　
C.B. Tabelin, S. Veerawattananum, M. Ito, N. Hiroyoshi, T. Igarashi, Proceedings of the 15th Japan-Korea-France-Canada Joint Seminar on Geo-environmental Engineering, 141, 150, 2016
English, Summary international conference

2.3.1 Coal cleaning(2.3 Processing and transportation of coal,2 Coal,II R&D of technology for energy resource utilization,Annual Energy Reviews-2014)
ITO M., Journal of the Japan Institute of Energy, 94, 9, 915, 916, 20 Sep. 2015
The Japan Institute of Energy, Japanese

Effect of copper wires on the recovery of valuable metals and plastics from crushed small home appliances by JIG separation
Theerayut Phengsaart, Dawan Wiwattanadate, Mayumi Ito, Naoki Hamaya, Tabelin Carlito, Naoki Hiroyoshi, EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology, 765, 770, 01 Jan. 2015

Sequestration of boron, arsenic and selenium leached from tunnel-excavated rocks through adsorption　　　　　　　　　　　　　　　
C.B. Tabelin, A. Hashimoto, T. Igarashi, M. Ito, N. Hiroyoshi, Proc. of the 14th Global Joint Seminar on Geo-environmental Engineering, 5, 2015
English, Summary international conference

The effects of colloidal α-Fe2O3 on pyrite oxidative dissolution and their implications in the formation of acid mine drainage　　　　　　　　　　　　　　　
C.B. Tabelin, N. Hiroyoshi, M. Ito, T. Igarashi, Proc. of the 8th International Conference on Geological and Geo-resources Engineering and 7th Mineral Symposium, 17, 2015
English, Summary international conference

The effects of ferric-catechol on pyrite oxidation,　　　　　　　　　　　　　　　
X. Li, S. Veerawattananun, C.B. Tabelin, N. Hiroyoshi, M. Ito, the 13th International Symposium on East Asian Resources Recycling Technology,, 80, 87, 2015
English, Summary international conference

Effects of water recirculation on the flotation of Kushiro and Mozambique coals,　　　　　　　　　　　　　　　
M. Ito, G.C. Eliseu, C.B. Tabelin, N. Hiroyoshi, the 13th International Symposium on East Asian Resources Recycling Technology, 80, 87, 2015
English, Summary international conference

Novel method to recover gold from Printed Circuit Boards using ammonium thiosulfate media　　　　　　　　　　　　　　　
N. Hiroyoshi, Y. Nagata, M. Ito, C.B. Tabelin, the 13th International Symposium on East Asian Resources Recycling Technology,, 80, 87, 2015
English, Summary international conference

Recovery of valuable components from crushed mobile phones using Jig Separation　　　　　　　　　　　　　　　
M. Ito, N. Kitajima, A. Saito, S. Khanchang, C.B. Tabelin, N. Hiroyoshi, the 13th International Symposium on East Asian Resources Recycling Technology, 80, 87, 2015
English, Summary international conference

Bubble attachment on plastic particles during hybrid Jig Separation: Measurements during water pulsation,　　　　　　　　　　　　　　　
M. Ito, N. Murase, A. Saito, C.B. Tabelin, N. Hiroyoshi, the 13th International Symposium on East Asian Resources Recycling Technology, Pattaya, 80, 87, 2015
English, Summary international conference

Acid Mine Drainage: Sources, environmental impacts and mitigation approaches　　　　　　　　　　　　　　　
C.B. Tabelin, M, Ito, N. Hiroyoshi, T. Igarashi, Proc. of the 2nd International Symposium Integrated Research and Education Center for Energy Conversion, Storage, Saving, and Transport Technologies,, 13, 14, 2015
English, Summary international conference

2.3.1 Coal cleaning(2.3 Processing and transportation of coal,2 Coal,II R&D of technology for energy resource utilization,Annual Energy Reviews-2013)
ITO M., Journal of the Japan Institute of Energy, 93, 9, 790, 791, 20 Sep. 2014
The Japan Institute of Energy, Japanese

Leachability of arsenic from tunnel-excavated rock under free- and controlled-flow conditions,　　　　　　　　　　　　　　　
C.B. Tabelin, T. Igarashi, M. Ito, N. Hiroyoshi, Proc. of the 13th Global Joint Seminar on Geo-Environmental Engineering,, 31, 37, 2014
English, Summary international conference

Immobilization of arsenic by schwertmannite synthesized from copper heap leach solutions,　　　　　　　　　　　　　　　
S. Houngaloune, N. Hiroyoshi, M. Ito, M. Fujimura, Proc. of the 6th international seminar on process hydrometallurgy (Hydroprocess2014), 3, 2014
English, Summary international conference

Enhanced encapsulation of pyrite using colloidal “micro-seeds”: Visualization and attachment experiments,　　　　　　　　　　　　　　　
C.B. Tabelin, N. Hiroyoshi, M. Ito, T. Igarashi, Proc. of the 7th AUN/SEED-Net Geological Engineering Conference and the 2nd AUN/SEED-Net Natural Disaster Conference,, 20, 2014
English, Summary international conference

Tunnel-excavated rock: An invisible threat to the environment,　　　　　　　　　　　　　　　
C.B. Tabelin, T. Igarashi, M. Ito, N. Hiroyoshi, Proc. of the 8th Asian Rock Mechanics Symposium, 2554, 2560, 2014
English, Summary international conference

The leaching and speciation behaviors of arsenic and selenium in tunnel-excavated rocks under flow-through conditions,　　　　　　　　　　　　　　　
C.B. Tabelin, R. Sasaki, T. Igarashi, S. Tamoto, M. Ito, N. Hiroyoshi, Proc. of the 3rd International Conference on Advances in Mining and Tunneling, 573, 581, 2014
English, Summary international conference

Gold leaching from waste printed circuit boards by ammonium thiosulfate leaching　　　　　　　　　　　　　　　
N. Hiroyoshi, Y. Nagata, M. Ito, C.B. Tabelin, Proc. of the 8th International Conference on Earth Resources Technology,, 19, 23, 2014
English, Summary international conference

Treatment of cobalt-rich ferromanganese ore
M. Ito, K. Asakura, S. Futakuchi, N. Hiroyoshi, 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings, 2242, 2252, 01 Dec. 2012

Hybrid jig separation of plastic particles and surface modification of the plastics
M. Ito, M. Takeuchi, E. Ishida, N. Hiroyoshi, M. Tsunekawa, 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings, 2235, 2241, 01 Dec. 2012

ハイブリッドジグ選別のためのプラスチックの表面改質
伊藤真由美, 竹内愛, 広吉直樹, 資源・素材, 2012, 25, 11 Sep. 2012
Japanese

各種比重選別によるコバルトリッチクラストと脈石の分離
伊藤真由美, 朝倉賢, 広吉直樹, 恒川昌美, 資源・素材, 2012, 19, 11 Sep. 2012
Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2. 石炭,II エネルギー資源の利用技術の進展と研究動向,平成23年における重要なエネルギー関係事項)
伊藤 真由美, 日本エネルギー学会誌, 91, 8, 717, 718, 20 Aug. 2012
一般社団法人日本エネルギー学会, Japanese

回分式ジグ選別過程の圧力計測に基づく解析
広吉直樹, 河合孝樹, 武田良介, 伊藤真由美, 資源・素材学会春季大会講演集, 2012, 214, 215, 2012
Japanese

選択的電析・磁化を用いたAl合金の選別技術の開発
伊藤真由美, 中村啓一郎, ALORRO Richard Diaz, 広吉直樹, 資源・素材学会春季大会講演集, 2012, 45, 46, 2012
Japanese

ベトナム・ドンパオ鉱石中のレアアース鉱物の選択粉砕と磁選
伊藤真由美, 高松慎, 朝倉賢, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2012, 45, 46, 2012
Japanese

PVC/Nylonのハイブリッドジグ選別~プラスチックの濡れ性に及ぼすAOT添加の影響~
伊藤真由美, 竹内愛, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 2012, 216, 217, 2012
Japanese

銅電解スライム浮選に関しての基礎的研究
伊藤真由美, 池本貴志, 朝倉賢, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2012, 43, 44, 2012
Japanese

ブラウン管ガラス熔融処理残渣からの鉛の溶出機構
広吉直樹, 高谷佳寛, 岡田敬志, 伊藤真由美, 稲野浩行, 資源・素材学会北海道支部春季講演会講演要旨集, 2012, 49, 50, 2012
Japanese

合成マグネタイトによる塩化物溶液からの白金族の回収
広吉直樹, 佐藤遼, HOMCHUEN Peet, 雉子谷東, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2012, 41, 42, 2012
Japanese

低品位銅鉱ヒープリーチング溶液からのシュベルトマナイト生成に関する基礎的研究
広吉直樹, 河合崇泰, 伊藤真由美, 岡本秀征, 資源・素材学会春季大会講演集, 2012, 190, 191, 2012
Japanese

金属回収のためのFe/Al複合粒子の調製
伊藤真由美, 祐川香太, 小杉正人, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2012, 47, 48, 2012
Japanese

伊豆・小笠原海域の海底熱水鉱床(硫化物)のJIG選別・浮遊選鉱
伊藤真由美, 小林幹男, 矢野伸彦, 資源・素材, 2012, 105, 108, 2012
Japanese

ジグ内粒子運動の圧力計測に基づく解析
広吉直樹, 河合孝樹, 武田良介, 伊藤真由美, 恒川昌美, 資源・素材, 2011, 2, 197, 198, 26 Sep. 2011
Japanese

銅製錬スラグを用いた塩化物溶液からの金回収
広吉直樹, 雉子谷東, ALORRO Richard Diaz, 伊藤真由美, 資源・素材, 2011, 2, 135, 136, 26 Sep. 2011
Japanese

銅製錬所鉛澱物の鉛濃縮に関する研究
広吉直樹, 大山史織, 伊藤真由美, 資源・素材, 2011, 2, 203, 204, 26 Sep. 2011
Japanese

Fe/Al複合粒子を用いた金属溶液からの金属回収
伊藤真由美, 小杉正人, 祐川香太, 広吉直樹, 資源・素材, 2011, 2, 141, 142, 26 Sep. 2011
Japanese

ベトナム・ドンパオ鉱石中のレアアース鉱物の回収~粉砕・分級特性~
恒川昌美, 西川千尋, 伊藤真由美, 広吉直樹, SATUR Jacqueline Vidal, 資源・素材, 2011, 2, 137, 138, 26 Sep. 2011
Japanese

海底熱水鉱床鉱石中の閃亜鉛鉱の浮選挙動
伊藤真由美, 二口修吏, 朝倉賢, 高橋達, 広吉直樹, 恒川昌美, 資源・素材, 2011, 2, 139, 140, 26 Sep. 2011
Japanese

聴講記 平成23年度全国鉱山・製錬所現場担当者会議
伊藤 真由美, 小山 和也, 今宿 晋, 資源・素材学会誌, 127, 9, 598, 600, Sep. 2011
資源・素材学会, Japanese

7-326 Internship Programs in the Course of Sustainable Resources Engineering, School of Engineering, Hokkaido University
ITO Mayumi, HIROYOSHI Naoki, IGARASHI Toshifumi, 工学教育研究講演会講演論文集, 23, 59, 620, 621, 22 Aug. 2011
Japanese Society for Engineering Education, Japanese

平成22年における重要なエネルギー関係事項 II エネルギー資源の利用技術の進展と研究動向 2.石炭 2.3 石炭の加工と輸送技術 2.3.1 コールクリーニング
伊藤真由美, J Jpn Inst Energy, 90, 8, 737, 737, 20 Aug. 2011
一般社団法人 日本エネルギー学会, Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2 石炭,II エネルギー資源の利用技術の進展と研究動向,平成22年における重要なエネルギー関係事項)
伊藤 真由美, 日本エネルギー学会誌, 90, 8, 737, 737, 20 Aug. 2011
一般社団法人日本エネルギー学会, Japanese

ヒ素含有銅鉱石のヒープリーチングに関する基礎的研究
広吉直樹, 河合崇泰, 伊藤正樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2011, 41, 42, 2011
Japanese

ベトナム・ドンパオ鉱石中のレアアース鉱物の回収~粉砕・分級特性~
恒川昌美, 西川千尋, 伊藤真由美, 広吉直樹, SATUR Jacqueline Vidal, 資源・素材学会春季大会講演集, 2011 (CD-ROM), ROMBUNNO.2123, 2011
Japanese

海底熱水鉱床鉱石の選鉱に関する基礎的研究~加温浮選とKnelson Concentratorを用いた銅・鉛・亜鉛鉱物の分離~
伊藤真由美, 朝倉賢, 二口修吏, 高橋達, 広吉直樹, 恒川昌美, 資源・素材学会北海道支部春季講演会講演要旨集, 2011, 39, 40, 2011
Japanese

海底熱水鉱床鉱石のジグによる比重選別
伊藤真由美, 二口修吏, 朝倉賢, 高橋達, 広吉直樹, 海洋工学シンポジウム(CD-ROM), 22nd, ROMBUNNO.OES22-008, 2011
Japanese

ジグ内粒子運動の圧力計測に基づく解析
広吉直樹, 河合孝樹, 武田良介, 伊藤真由美, 恒川昌美, 資源・素材学会春季大会講演集, 2011 (CD-ROM), ROMBUNNO.2103, 2011
Japanese

銅製錬スラグを用いた塩化物溶液からの金回収
広吉直樹, 雉子谷東, ALORRO Richard Diaz, 伊藤真由美, 資源・素材学会春季大会講演集, 2011 (CD-ROM), ROMBUNNO.2110, 2011
Japanese

ジグ内粒子運動の圧力損失に基づくセンシング
広吉直樹, 河合孝樹, 武田良介, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2011, 33, 34, 2011
Japanese

海底熱水鉱床鉱石中の閃亜鉛鉱の浮選挙動
伊藤真由美, 二口修吏, 朝倉賢, 高橋達, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 2011 (CD-ROM), ROMBUNNO.2121, 2011
Japanese

プラスチックのハイブリッドジグ選別に及ぼす濡れ性制御の影響~PVC/NylonとHDPS/PPGFの選別~
伊藤真由美, 竹内愛, 石田絵美, 赤塚真依子, 広吉直樹, 恒川昌美, 資源・素材学会北海道支部春季講演会講演要旨集, 2011, 35, 36, 2011
Japanese

Al合金リサイクルのための選択的電析・磁化技術の開発~銅含有Al合金とその他のAlの選別~
伊藤真由美, DIAZ ALORRO Richard, 中村啓一郎, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2011, 37, 38, 2011
Japanese

Recovery of precious metals from chloride solution by magnetite
R. Alorro, N. Hiroyoshi, M. Ito, M. Tsunekawa, XXV International Mineral Processing Congress 2010, IMPC 2010, 1, 263, 271, 01 Dec. 2010

Advanced Jig separation of shredded plastics
M. Ito, M. Akatsuka, E. Ishida, K. Hori, N. Hiroyoshi, M. Tsunekawa, XXV International Mineral Processing Congress 2010, IMPC 2010, 2, 843, 850, 01 Dec. 2010

Carrier micro encapsulation (CME) for suppressing pyrite floatability and oxidation in coal preparation
R. Jha, J. Satur, N. Hiroyoshi, M. Ito, M. Tsunekawa, XXV International Mineral Processing Congress 2010, IMPC 2010, 3, 2025, 2033, 01 Dec. 2010

混合プラスチックの湿式比重選別―RETAC JIGの原理と応用
堀邦紘, 恒川昌美, 阿部中, 広吉直樹, 伊藤真由美, 岡田敦志, 丹野秀昭, 高分子学会予稿集(CD-ROM), 59, 2 Disk1, ROMBUNNO.3Z03, 01 Sep. 2010
Japanese

2.3.1コールクリーニング(2.3 石炭の加工と輸送技術,2 石炭,II エネルギー資源の利用技術の進展と研究動向,平成21年における重要なエネルギー関係事項)
伊藤 真由美, 日本エネルギー学会誌, 89, 8, 762, 763, 20 Aug. 2010
一般社団法人日本エネルギー学会, Japanese

複雑希土類鉱石中のバストネサイトの浮選分離(第2報)
恒川昌美, 西川千尋, 伊藤真由美, 広吉直樹, SATUR Jacqueline Vidal, 資源・素材学会春季大会講演集, 2, 53, 54, 30 Mar. 2010
Japanese

液晶パネルのリサイクルに関する基礎的研究
恒川昌美, 朝比奈遼, 広吉直樹, 伊藤真由美, 浜野孝俊, 志村一美, 資源・素材学会春季大会講演集, 2, 177, 178, 30 Mar. 2010
Japanese

硫化鉱物の浮遊性に及ぼすキャリアマイクロエンカプセレーションの効果
広吉直樹, 川代晋太郎, JHA Rani, Kumari Thakur, 恒川昌美, 伊藤真由美, 資源・素材学会春季大会講演集, 2, 51, 52, 30 Mar. 2010
Japanese

黄銅鉱浸出のためのマグネタイト利用に関する研究
広吉直樹, 伊藤正樹, 竹原裕生, 恒川昌美, 伊藤真由美, 資源・素材学会春季大会講演集, 1, 29, 30, 30 Mar. 2010
Japanese

電線被覆PVCからの鉛除去~三塩基性硫酸鉛と金属酸化物の凝集・分散~
広吉直樹, 酒井智生, 三村隼生, 恒川昌美, 伊藤真由美, 資源・素材学会春季大会講演集, 2, 179, 180, 30 Mar. 2010
Japanese

深海底鉱物資源開発のための選鉱法の確立
伊藤真由美, 恒川昌美, 広吉直樹, 資源・素材, 2010, 1, 245, 246, 2010
Japanese

リバースジグの選別性に及ぼす各種要因の検討
恒川昌美, 河合孝樹, 石田絵美, 広吉直樹, 伊藤真由美, 阿部中, 資源・素材学会北海道支部春季講演会講演要旨集, 2010, 45, 46, 2010
Japanese

マグネタイトによる塩化物溶液からの金吸着
広吉直樹, 雉子谷東, DIAZ ALORRO Richard, 恒川昌美, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2010, 41, 42, 2010
Japanese

メッキ廃水汚泥の安定性評価と資源化に関する研究
恒川昌美, 大山史織, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2010, 27, 28, 2010
Japanese

カーシュレッダーダストからの低塩素分・低灰分可燃物の回収
恒川昌美, 小杉正人, 桑山豊, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2010, 29, 30, 2010
Japanese

海底熱水鉱床鉱石の選鉱
伊藤真由美, 二口修吏, 高橋達, 広吉直樹, 恒川昌美, 資源・素材学会北海道支部春季講演会講演要旨集, 2010, 43, 44, 2010
Japanese

Surface modification of shredder residue plastics for hybrid jig processing
M. Ito, M. Akatsuka, Y. Kuwayama, K. Hori, N. Hiroyoshi, M. Tsunekawa, The Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III, 1, 315, 320, 01 Dec. 2009

平成20年における重要なエネルギー関係事項 II エネルギー資源の利用技術の進展と研究動向 2.石炭 2.3 石炭の加工と輸送技術 2.3.1 コールクリーニング
伊藤真由美, 恒川昌美, J Jpn Inst Energy, 88, 8, 680, 20 Aug. 2009
Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2 石炭,II エネルギー資源の利用技術の進展と研究動向,平成20年における重要なエネルギー関係事項)
伊藤 真由美, 恒川 昌美, 日本エネルギー学会誌, 88, 8, 680, 680, 20 Aug. 2009
一般社団法人日本エネルギー学会, Japanese

レパント金鉱山廃石の電気パルス粉砕処理特性
伊藤真由美, 浜野孝俊, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 2, 83, 84, 26 Mar. 2009
Japanese

微粒子のジグ選別
恒川昌美, 扇子渉, 堀邦紘, 小林利輝, 伊藤真由美, 広吉直樹, 資源・素材学会春季大会講演集, 2, 169, 170, 26 Mar. 2009
Japanese

非水/水溶液界面への鉛含有微粒子の捕捉現象
恒川昌美, 三村隼生, 酒井智生, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会講演集, 2, 115, 116, 26 Mar. 2009
Japanese

綿状物を含むASR粉砕産物中の不燃物,塩素の物理選別による除去
桑山豊, 伊藤真由美, 赤塚真依子, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 2, 105, 106, 26 Mar. 2009
Japanese

圧力センサーを用いたジグ選別のモニタリング
恒川昌美, 秋元淳希, 堀邦紘, 小林利輝, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会講演集, 2, 173, 174, 26 Mar. 2009
Japanese

コバルトリッチクラストの細粒群のジグ選別
伊藤真由美, 高橋達, 關村健吾, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 2, 85, 86, 26 Mar. 2009
Japanese

各種センサーを用いたジグ選別特性の把握
恒川昌美, 秋元淳希, 広吉直樹, 伊藤真由美, 資源・素材, 2009, 37, 2009
Japanese

Lepanto金鉱山廃石の電気パルス粉砕
伊藤真由美, 浜野孝俊, 広吉直樹, 恒川昌美, 資源・素材, 2009, 31, 2009
Japanese

複雑希土類鉱石中のバストネサイトの浮選分離
恒川昌美, 西川千尋, VIDAL SATUR Jacqueline, 伊藤真由美, 広吉直樹, 資源・素材, 2009, 35, 2009
Japanese

焼却灰の脱塩素特性に関する研究
恒川昌美, 朝比奈遼, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2009, 55, 56, 2009
Japanese

微粒子ジグ選別における諸要因の影響
扇子渉, 恒川昌美, 広吉直樹, 伊藤真由美, 資源・素材, 2009, 36, 2009
Japanese

カテコール類似物質による酸化鉱物の選択的表面改質
広吉直樹, 川代晋太郎, JHA Rani, Kumari Thakur, 恒川昌美, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2009, 51, 52, 2009
Japanese

非水溶媒中に懸濁する鉛含有微粒子の固体表面への吸着除去
広吉直樹, 酒井智生, 三村隼生, 恒川昌美, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2009, 53, 54, 2009
Japanese

家電プラスチックのアドバンストジグ選別
伊藤真由美, 赤塚真依子, 石田絵美, 高橋達, 桑山豊, 広吉直樹, 恒川昌美, 資源・素材, 2009, 38, 2009
Japanese

コバルトリッチクラストの選鉱法の確立
伊藤真由美, 恒川昌美, 広吉直樹, 資源・素材, 2009, 1, 235, 238, 2009
Japanese

硫酸溶液中での黄銅鉱浸出に対するマグネタイトの影響
広吉直樹, 伊藤正樹, 竹原裕生, 恒川昌美, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2009, 49, 50, 2009
Japanese

複雑希土類鉱石の選鉱
恒川昌美, 西川千尋, SATUR Jacqueline Vidal, 伊藤真由美, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2009, 47, 48, 2009
Japanese

コバルトリッチクラストの選鉱と希少金属の回収
伊藤真由美, 高橋達, ALORRO Richard D, 關村健吾, 広吉直樹, 恒川昌美, 資源・素材, 2009, 32, 2009
Japanese

電線被覆PVCからの鉛含有微粒子の除去
広吉直樹, 酒井智生, 三村隼生, 恒川昌美, 伊藤真由美, 資源・素材, 2009, 41, 2009
Japanese

Physical separation of crushed product of waste nickel-metal hydride batteries from hybrid vehicles
M. Ito, M. Tsunekawa, K. Kashiwaya, N. Sumiya, H. Furuya, N. Hiroyoshi, Proceedings of the 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008, 3, 8, 01 Dec. 2008

平成19年における重要なエネルギー関係事項 II エネルギー資源の利用技術の進展と研究動向 2.石炭 2.3 石炭の加工と輸送技術 2.3.1 コールクリーニング
伊藤真由美, 恒川昌美, J Jpn Inst Energy, 87, 8, 606, 606, 20 Aug. 2008
一般社団法人 日本エネルギー学会, Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2. 石炭,II エネルギー資源の利用技術の進展と研究動向,平成19年における重要なエネルギー関係事項)
伊藤 真由美, 恒川 昌美, 日本エネルギー学会誌, 87, 8, 606, 606, 20 Aug. 2008
一般社団法人日本エネルギー学会, Japanese

コバルトリッチクラストの選鉱に関する基礎的研究 第二報
恒川昌美, 伊藤真由美, 關村健吾, 山口英志, 高橋達, 柏谷公希, 広吉直樹, 資源・素材学会春季大会講演集, 2, 197, 198, 27 Mar. 2008
Japanese

ジグ選別における粒子の沈降挙動と選別パターン
堀邦紘, 恒川昌美, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会講演集, 2, 109, 110, 27 Mar. 2008
Japanese

連続式網下気室型ジグ(RETAC Jig)選別の高度化に関する基礎的研究
恒川昌美, 小林利輝, 堀邦紘, 岡田英明, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会講演集, 2, 107, 108, 27 Mar. 2008
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究 第4報
伊藤真由美, 高田政雄, 帆苅直弘, 恒川昌美, 広吉直樹, 資源・素材学会春季大会講演集, 2, 189, 190, 27 Mar. 2008
Japanese

黄銅鉱のカラムリーチング
広吉直樹, 竹原裕生, 桑澤毅成, 恒川昌美, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2008, 43, 44, 2008
Japanese

非水/水溶液界面への微粒子の捕捉現象とそのメカニズム
恒川昌美, 三村隼生, 佐々木勇太, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2008, 47, 48, 2008
Japanese

コバルトリッチクラスト・ノジュールと脈石のJIG選別~大型JIG処理試験と最適運転条件の検討~
伊藤真由美, 高橋達, 關村健吾, 広吉直樹, 恒川昌美, 資源・素材学会北海道支部春季講演会講演要旨集, 2008, 45, 46, 2008
Japanese

鉛汚染土壌からの鉛分の溶解およびセメンテーション~セメンテーションの検討~
伊藤真由美, 高田政雄, 帆苅直弘, 恒川昌美, 広吉直樹, 資源・素材, 2008, 44, 2008
Japanese

ジグ選別プロセスにおける粒子流動化現象と最適条件
恒川昌美, 秋元淳希, 堀邦紘, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2008, 7, 8, 2008
Japanese

微粒子用ジグ選別機に関する基礎的研究
恒川昌美, 扇子渉, 堀邦紘, 小林利輝, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2008, 5, 6, 2008
Japanese

湿式サイクロンにおける微粒子の挙動に及ぼす粒子形状の影響
柏谷公希, 能町聖彦, 伊藤真由美, 広吉直樹, 恒川昌美, 資源・素材, 2008, 32, 2008
Japanese

コバルトリッチクラストの選鉱に関する基礎的研究 第三報
關村健吾, 恒川昌美, 伊藤真由美, 高橋達, 広吉直樹, 資源・素材, 2008, 17, 2008
Japanese

プラスチックの表面改質とハイブリットジグへの適用
赤塚真依子, 伊藤真由美, SATUR Jacqueline, 桑山豊, 広吉直樹, 恒川昌美, 資源・素材, 2008, 34, 2008
Japanese

平成18年における重要なエネルギー関係事項 II エネルギー資源の利用技術の進展と研究動向
大渕修, 前川忠, 稲葉仁, 小俣光司, 田本芳隆, 佐藤信也, 古川博文, 川島裕之, 小谷野耕二, 鷹觜利公, 伊藤真由美, 恒川昌美, 溝口忠一, 大木章, 安田肇, 山田理, 海保守, 加藤健次, 高橋佳司, 吉澤徳子, 小針厚志, 佐藤憲明, 本村真澄, 末廣能史, 浅野嘉章, 湯浅和昭, 沼田義文, 荒木和路, 柳川達彦, 富田雅人, 竹口聡一, 横山博文, 作田宏一, 村岡洋文, 松宮ひかる, 大澤弘敬, 小木知子, 名木稔, 坂田興, 後藤慎吾, J Jpn Inst Energy, 86, 8, 546, 614, 20 Aug. 2007
Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2. 石炭,II エネルギー資源の利用技術の進展と研究動向,平成18年における重要なエネルギー関係事項)
伊藤 真由美, 恒川 昌美, 日本エネルギー学会誌, 86, 8, 568, 569, 20 Aug. 2007
一般社団法人日本エネルギー学会, Japanese

Recovery of Heavy Metals from MSW Melting Fly Ash by Carrier-in-Pulp Method
ALORRO Richard D., HIROYOSHI Naoki, ITO Mayumi, TSUNEKAWA Masami, 春季大会講演集. I, 資源編, 19, 2, 161, 162, 29 Mar. 2007
English

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究 第3報
伊藤真由美, 帆苅直弘, 高田政雄, 恒川昌美, 広吉直樹, 資源・素材学会春季大会講演集, 19, 1, KIKAKU.85-KIKAKU.86, 85"-"企画-86", 29 Mar. 2007
Japanese

黄銅鉱浸出の電位制御による最適化
桑澤毅成, 恩田真吾, 広吉直樹, 恒川昌美, 伊藤真由美, 資源・素材学会春季大会講演集, 19, 2, 45, 46, 29 Mar. 2007
Japanese

JIGを用いたコバルトリッチクラストの選鉱
恒川昌美, 伊藤真由美, 山口英志, 關村健吾, 柏谷公希, 広吉直樹, 資源・素材学会春季大会講演集, 19, 2, 53, 54, 29 Mar. 2007
Japanese

カーシュレッダーダスト(ASR)の有価物湿式回収プロセスの開発~ASRのジグ選別における繊維状物質の挙動~
伊藤真由美, 桑山豊, 赤塚真依子, 堀邦鉱, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 19, 2, 23, 24, 29 Mar. 2007
Japanese

廃Ni‐MH電池リサイクルプロセスにおける破砕微粉の物理選別
伊藤真由美, 角谷直宏, 柏谷公希, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 19, 2, 31, 32, 29 Mar. 2007
Japanese

ハイブリッドジグ選別におけるプラスチック表面の濡れ性の影響
恒川昌美, 岡田英明, 堀邦紘, 越智大司, 小林利輝, 上田将経, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会講演集, 19, 2, 25, 26, 29 Mar. 2007
Japanese

カーシュレッダーダスト(ASR)の有価物湿式回収プロセスの開発~界面活性剤溶液中でのASR浸漬・解砕挙動~
伊藤真由美, 赤塚真依子, 桑山豊, 堀邦紘, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 19, 2, 21, 22, 29 Mar. 2007
Japanese

微量の水分を含む有機溶媒中での疎水性微粒子の分散・凝集
恒川昌美, 佐々木勇太, 中村孔亮, 伊藤真由美, 広吉直樹, YOO Kyoung Keun, 資源・素材学会春季大会講演集, 19, 2, 51, 52, 29 Mar. 2007
Japanese

プラスチック微粒子の湿式サイクロンによる分級
柏谷公希, 能町聖彦, 伊藤真由美, 山本康彰, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 19, 2, 29, 30, 29 Mar. 2007
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究 第3報
伊藤 真由美, 帆苅 直弘, 高田 政雄, 恒川 昌美, 広吉 直樹, 春季大会講演集. I, 資源編, 19, 2, "企画, 85"-"企画-86", 29 Mar. 2007
Japanese

カーシュレッダーダスト(ASR)の有価物湿式回収プロセスの開発 : 界面活性剤溶液中でのASR浸漬・解砕挙動
伊藤 真由美, 赤塚 真依子, 桑山 豊, 堀 邦紘, 広吉 直樹, 恒川 昌美, 春季大会講演集. I, 資源編, 19, 2, 21, 22, 29 Mar. 2007
Japanese

カーシュレッダーダスト(ASR)の有価物湿式回収プロセスの開発 : ASRのジグ選別における繊維状物質の挙動
伊藤 真由美, 桑山 豊, 赤塚 真依子, 堀 邦鉱, 広吉 直樹, 恒川 昌美, 春季大会講演集. I, 資源編, 19, 2, 23, 24, 29 Mar. 2007
Japanese

ハイブリッドジグ選別におけるプラスチック表面の濡れ性の影響
恒川 昌美, 岡田 英明, 堀 邦紘, 越智 大司, 小林 利輝, 上田 将経, 広吉 直樹, 伊藤 真由美, 春季大会講演集. I, 資源編, 19, 2, 25, 26, 29 Mar. 2007
Japanese

プラスチック微粒子の湿式サイクロンによる分級
柏谷 公希, 能町 聖彦, 伊藤 真由美, 山本 康彰, 広吉 直樹, 恒川 昌美, 春季大会講演集. I, 資源編, 19, 2, 29, 30, 29 Mar. 2007
Japanese

廃Ni-MH電池リサイクルプロセスにおける破砕微粉の物理選別
伊藤 真由美, 角谷 直宏, 柏谷 公希, 広吉 直樹, 恒川 昌美, 春季大会講演集. I, 資源編, 19, 2, 31, 32, 29 Mar. 2007
Japanese

黄銅鉱浸出の電位制御による最適化
桑澤 毅成, 恩田 真吾, 広吉 直樹, 恒川 昌美, 伊藤 真由美, 春季大会講演集. I, 資源編, 19, 2, 45, 46, 29 Mar. 2007
Japanese

微量の水分を含む有機溶媒中での疎水性微粒子の分散・凝集
恒川 昌美, 佐々木 勇太, 中村 孔亮, 伊藤 真由美, 広吉 直樹, YOO Kyoung Keun, 春季大会講演集. I, 資源編, 19, 2, 51, 52, 29 Mar. 2007
Japanese

JIGを用いたコバルトリッチクラストの選鉱
恒川 昌美, 伊藤 真由美, 山口 英志, 關村 健吾, 柏谷 公希, 広吉 直樹, 春季大会講演集. I, 資源編, 19, 2, 53, 54, 29 Mar. 2007
Japanese

疎水性プラスチック微粒子の湿式サイクロンによる分級
柏谷公希, 能町聖彦, 伊藤真由美, 山本康彰, 広吉直樹, 恒川昌美, 資源・素材学会北海道支部春季講演会講演要旨集, 2007, 47, 48, 2007
Japanese

次世代型石炭高効率発電のためのアドバンストコールクリーニング技術の動向
伊藤真由美, 資源・素材, 2007, A/B, 241, 244, 2007
Japanese

Leaching&Cementation法による鉛汚染土壌の浄化~処理プロセスの検討~
伊藤真由美, 高田政雄, 帆苅直弘, 広吉直樹, 恒川昌美, 地下水・土壌汚染とその防止対策に関する研究集会講演集(CD-ROM), 13th, ROMBUNNO.S5-5, 2007
Japanese

カーシュレッダーダスト(ASR)の有価物湿式回収プロセスの開発~ASRの溶液浸漬性評価と浸漬機構の解明~
伊藤真由美, 赤塚真依子, 桑山豊, 堀邦紘, 広吉直樹, 恒川昌美, 資源・素材学会北海道支部春季講演会講演要旨集, 2007, 49, 50, 2007
Japanese

Leaching&Cementation法による鉛汚染土壌の浄化~鉛の除去率に及ぼす各種因子の影響~
伊藤真由美, 帆苅直弘, 高田政雄, 広吉直樹, 恒川昌美, 地下水・土壌汚染とその防止対策に関する研究集会講演集(CD-ROM), 13th, ROMBUNNO.S5-4, 2007
Japanese

鉛汚染土壌からの鉛除去に関する研究~クエン酸による土中鉛浸出と鉄粉濃縮挙動の把握~
伊藤真由美, 高田政雄, 帆苅直弘, 恒川昌美, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2007, 27, 28, 2007
Japanese

連続式ジグのプラスチック選別特性~回分式ジグとの比較~
恒川昌美, 小林利輝, 堀邦紘, 越智大司, 岡田英明, 広吉直樹, 伊藤真由美, 資源・素材学会北海道支部春季講演会講演要旨集, 2007, 45, 46, 2007
Japanese

深海底鉱物資源の有効利用に関する研究~コバルトリッチクラストと基盤岩のJIG選別~
恒川昌美, 伊藤真由美, 山口英志, 關村健吾, 柏谷公希, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2007, 43, 44, 2007
Japanese

平成17年における重要なエネルギー関係事項 II エネルギー資源の利用技術の進展と研究動向
山川千秋, 前川忠, 坂西欣也, 小俣光司, 田本芳隆, 佐藤信也, 古川博文, 川島裕之, 小谷野耕二, 鷹觜利公, 伊藤真由美, 恒川昌美, 溝口忠一, 大木章, 安田肇, 山田理, 海保守, 加藤健次, 高橋佳司, 吉澤徳子, 小針厚志, 小野寺博, 本村真澄, 末廣能史, 舛田直之, 湯浅和昭, 沼田義文, 荒木和路, 柳川達彦, 富田雅人, 鈴木聡, 横山博文, 作田宏一, 村岡洋文, 松宮ひかる, 大澤弘敬, 小木知子, 名木稔, 坂田興, 佐藤充克, J Jpn Inst Energy, 85, 8, 612, 676, 20 Aug. 2006
一般社団法人 日本エネルギー学会, Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2. 石炭,II エネルギー資源の利用技術の進展と研究動向,平成17年における重要なエネルギー関係事項)
伊藤 真由美, 恒川 昌美, 日本エネルギー学会誌, 85, 8, 633, 635, 20 Aug. 2006
一般社団法人日本エネルギー学会, Japanese

平成18年度全国鉱山製錬所現場担当者会議 聴講記
安達 毅, 伊藤 真由美, 宇田 哲也, 植田 滋, 小俣 孝久, 前田 浩孝, 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan, 122, 6, 375, 377, 25 Jul. 2006
Japanese

見学会 A班(資源部門) 柵原鉱山見学記 (平成18年度 全国鉱山・製錬所「現場担当者会議」報告)
伊藤 真由美, 鉱山, 59, 6, 20, 22, Jul. 2006
金属鉱山会, Japanese

The 8th International Symposium on East Asian Resources Recycling Technology (EARTH2005)
伊藤 真由美, Journal of the Mining and Materials Processing Institute of Japan, 122, 4, 163, 165, 25 May 2006
資源・素材学会, Japanese

Effects of Carrier-Microencapsulation on Surface Chemical Properties of Pyrite
SATUR Jacqueline, HIROYOSHI Naoki, ITO Mayumi, TSUNEKAWA Masami, 春季大会講演集. I, 資源編, 18, 2, 65, 66, 27 Mar. 2006
English

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究 第2報
伊藤真由美, 久保泰政, 帆苅直弘, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 18, 2, 179, 180, 27 Mar. 2006
Japanese

リーチングとセメンテーションによる都市ゴミ溶融飛灰からのPb除去・回収
広吉直樹, 三谷慎一, 伊藤真由美, 恒川昌美, 資源・素材学会春季大会講演集, 18, 2, 135, 136, 27 Mar. 2006
Japanese

プラスチックのジグ選別における分離プロセスに関する一考察
恒川昌美, 越智大司, 堀邦紘, 上田将経, 岡田英明, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会春季大会講演集, 18, 2, 47, 48, 27 Mar. 2006
Japanese

ジグ選別における水の圧力損失と選別性の関係
堀邦紘, 恒川昌美, 上田将経, 越智大司, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会春季大会講演集, 18, 2, 43, 44, 27 Mar. 2006
Japanese

気泡を利用したジグ選別の改良
恒川昌美, 上田将経, 堀邦紘, 越智大司, 岡田英明, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会春季大会講演集, 18, 2, 45, 46, 27 Mar. 2006
Japanese

ジグ選別における水の圧力損失と選別性の関係
堀 邦紘, 恒川 昌美, 上田 将経, 越智 大司, 広吉 直樹, 伊藤 真由美, 伊藤 正澄, 春季大会講演集. I, 資源編, 18, 2, 43, 44, 27 Mar. 2006
Japanese

気泡を利用したジグ選別の改良
恒川 昌美, 上田 将経, 堀 邦紘, 越智 大司, 岡田 英明, 広吉 直樹, 伊藤 真由美, 伊藤 正澄, 春季大会講演集. I, 資源編, 18, 2, 45, 46, 27 Mar. 2006
Japanese

プラスチックのジグ選別における分離プロセスに関する一考察
恒川 昌美, 越智 大司, 堀 邦紘, 上田 将経, 岡田 英明, 広吉 直樹, 伊藤 真由美, 伊藤 正澄, 春季大会講演集. I, 資源編, 18, 2, 47, 48, 27 Mar. 2006
Japanese

リーチングとセメンテーションによる都市ゴミ溶融飛灰からのPb除去・回収
広吉 直樹, 三谷 慎一, 伊藤 真由美, 恒川 昌美, 春季大会講演集. I, 資源編, 18, 2, 135, 136, 27 Mar. 2006
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究 第2報
伊藤 真由美, 久保 泰政, 帆苅 直弘, 広吉 直樹, 恒川 昌美, 春季大会講演集. I, 資源編, 18, 2, 179, 180, 27 Mar. 2006
Japanese

微量の水分を含む非水溶液中での微粒子の分散・凝集
恒川昌美, 佐々木勇太, 中村孔亮, 伊藤真由美, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2006, 57, 58, 2006
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究 第2報
伊藤真由美, 久保泰政, 帆苅直弘, 広吉直樹, 恒川昌美, 地下水・土壌汚染とその防止対策に関する研究集会講演集(CD-ROM), 12th, ROMBUNNO.S4-5, 2006
Japanese

マイクロX線CTを用いた高電圧パルス試験試料の亀裂パターン観察
横田光博, 中宮優子, 大和田秀二, 趙祥鎬, 伊藤真由美, 金子勝比古, 資源・素材, 2006, 30, 2006
Japanese

プラスチックのハイブリッドジグ選別のための表面物性評価
恒川昌美, 岡田英明, 堀邦紘, 上田将経, 越智大司, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会北海道支部春季講演会講演要旨集, 2006, 55, 56, 2006
Japanese

ハイブリッド自動車用ニッケル水素電池からの湿式磁選法を用いた有価金属の回収
恒川昌美, 角谷直宏, 伊藤真由美, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2006, 51, 52, 2006
Japanese

鉛汚染土壌の新しい修復法に関する基礎的研究
伊藤真由美, 帆苅直弘, 久保泰政, 恒川昌美, 広吉直樹, 資源・素材学会北海道支部春季講演会講演要旨集, 2006, 11, 12, 2006
Japanese

廃コンクリートの湿式選別リサイクルプロセスの開発~再生骨材の性状に及ぼす原コンクリートの影響~
恒川昌美, 桑澤毅成, 伊藤真由美, 広吉直樹, 名和豊春, 西田法文, 田村幸保, 伊藤正澄, 資源・素材学会北海道支部春季講演会講演要旨集, 2006, 53, 54, 2006
Japanese

コバルトリッチクラストの選鉱に関する基礎的研究
恒川昌美, 山口英志, 伊藤真由美, 広吉直樹, 柴崎洋志, 吉田友之, 資源・素材, 2006, C/D, 167, 168, 2006
Japanese

破砕・粉砕技術の活用による金属含有廃棄物リサイクリングの高効率化に関する調査研究
古山隆, 伊藤真由美, 今井哲男, 大矢仁史, 大和田秀二, 神田良照, 斎藤淳, 坂本宏, 佐野茂, 柴山敦, 多屋貞男, 中沢広, 新田幸人, 橋口敬生, 原田光久, 藤田豊久, 森祐行, 日本鉱業振興会助成研究成果報告書, 2005, 95, 100, 11 Nov. 2005
Japanese

平成16年における重要なエネルギー関係事項 II エネルギー資源の利用技術の進展と研究動向
中本亮一, 前川忠, 坂西欣也, 小俣光司, 田本芳隆, 佐藤信也, 古川博文, 川島裕之, 樫村奈生, 鷹はし利公, 恒川昌美, 伊藤真由美, 溝口忠一, 大木章, 安田肇, 山田理, 海保守, 加藤健次, 高橋佳司, 原田博文, 原一夫, 小野寺博, 本村真澄, 末広能史, 舛田直之, 湯浅和昭, 沼田義文, 岡本洋三, 柳川達彦, 富田雅人, 鈴木聡, 永山正吾, 作田宏一, 村岡洋文, 松宮あきら, 大沢弘敬, 小木知子, 名木稔, 坂田興, 佐藤充克, J Jpn Inst Energy, 84, 8, 606, 669, 20 Aug. 2005
一般社団法人 日本エネルギー学会, Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2.石炭,II エネルギー資源の利用技術の進展と研究動向,平成16年における重要なエネルギー関係項目)
恒川 昌美, 伊藤 真由美, 日本エネルギー学会誌, 84, 8, 629, 630, 20 Aug. 2005
一般社団法人日本エネルギー学会, Japanese

鉛汚染土壌からのクエン酸による鉛分リーチングおよび担体を用いた鉛濃縮・除去に関する基礎的研究
伊藤真由美, 久保泰政, 広吉直樹, 恒川昌美, 地球環境シンポジウム講演論文集, 13th, 311, 315, 14 Jul. 2005
It is important to establish washing methods for contaminated soils by toxic metals such as lead in rifle shooting areas. In the lead-contaminated soils weathered after a long period, metal lead is extracted as ion, and is penetrated into the ground, depositing on the surface of soil particles or immersing into the pores of the particles mainly as a lead carbonate. Therefore it is difficult to remove lead from the weathered contaminated soils by conventional soil washing techniques such as sizing or gravity separation. In this study, a new method is proposed for removing lead from the contaminated soil. Lead components in the soil are extracted into the solution by sodium citrate as a chelating agent, and the extracted lead is precipitated on the surface of iron powder by redox reaction. Then the iron powder is recovered by physical separation techniques such as magnetic separation. Thermodynamic calculation showed that removal efficiency of lead was higher when leaching iron powder, sodium citrate, and lead carbonate simultaneously than when leaching first lead carbonate by sodium citrate and then adding iron powder to the lead citrate solution. This calculation result was supported by ICP and XRD results. The XRD pattern for the iron powder recovered by magnetic separation indicated that lead is present as solid form on the powder. The recovered powder would be used as a lead source in smelting process., Japan Society of Civil Engineers, Japanese

物理選別による廃2次電池中の有価物回収 II
恒川昌美, 古谷尚稔, 広吉直樹, 伊藤真由美, 北村修, 市川良二, 菊田和幸, 資源・素材学会春季大会講演集, 17, 2, 63, 64, 28 Mar. 2005
Japanese

土壌中のシアンの形態
恒川昌美, 伊藤真由美, 資源・素材学会春季大会講演集, 17, 1, KIKAKU.93-KIKAKU.96, 93"-"企画-96", 28 Mar. 2005
Japanese

電気パルス粉砕での単体分離促進機構に対する各種試料物性の影響―各種鉱物粒子分散セメント試料に関する検討―
大和田秀二, 伊藤真由美, 中川剛直, 中宮優子, ちょう祥こう, 資源・素材学会春季大会講演集, 17, 2, 67, 68, 28 Mar. 2005
Japanese

低比重細粒破砕物のジグ選別における粒子流動性と最適分離条件
恒川昌美, 堀邦紘, 上田将経, 越智大司, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会春季大会講演集, 17, 2, 55, 56, 28 Mar. 2005
Japanese

再生粗骨材を用いたコンクリートの強度に及ぼす湿式選別条件の影響
恒川昌美, 上杉浩平, 伊藤真由美, 伊藤正澄, 名和豊春, 西田法文, 広吉直樹, 平島剛, 資源・素材学会春季大会講演集, 17, 2, 173, 174, 28 Mar. 2005
Japanese

二成分系粉砕における各種優先破壊・単体分離モデルの比較
大和田秀二, 大宮隆之, 森川隆彦, 伊藤真由美, 資源・素材学会春季大会講演集, 17, 1, KIKAKU.49-KIKAKU.52, 49"-"企画-52", 28 Mar. 2005
Japanese

プラスチックのジグ選別における粒子物性の影響
恒川昌美, 上田将経, 堀邦紘, 越智大司, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会春季大会講演集, 17, 2, 57, 58, 28 Mar. 2005
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究
伊藤真由美, 久保泰政, 広吉直樹, 恒川昌美, 資源・素材学会春季大会講演集, 17, 2, 145, 146, 28 Mar. 2005
Japanese

キャリア浮選を用いた白色結晶質石灰石の高品位化
恒川昌美, 本間佑吾, 柳庚きん, 広吉直樹, 伊藤真由美, 資源・素材学会春季大会講演集, 17, 2, 53, 54, 28 Mar. 2005
Japanese

赤泥の有効利用に向けた磁選による鉄成分の濃縮およびチタン成分の存在状態
大和田秀二, 伊藤真由美, 岡島大, 資源・素材学会春季大会講演集, 17, 2, 65, 66, 28 Mar. 2005
Japanese

二成分系粉砕における各種優先破壊・単体分離モデルの比較
大和田 秀二, 大宮 隆之, 森川 隆彦, 伊藤 真由美, 春季大会講演集. I, 資源編, 17, 2, "企画, 49"-"企画-52", 28 Mar. 2005
Japanese

赤泥の有効利用に向けた磁選による鉄成分の濃縮およびチタン成分の存在状態
大和田 秀二, 伊藤 真由美, 岡島 大, 春季大会講演集. I, 資源編, 17, 2, 65, 66, 28 Mar. 2005
Japanese

電気パルス粉砕での単体分離促進機構に対する各種試料物性の影響 : 各種鉱物粒子分散セメント試料に関する検討
大和田 秀二, 伊藤 真由美, 中川 剛直, 中宮 優子, 趙 祥鎬, 春季大会講演集. I, 資源編, 17, 2, 67, 68, 28 Mar. 2005
Japanese

土壌中のシアンの形態
恒川 昌美, 伊藤 真由美, 春季大会講演集. I, 資源編, 17, 2, "企画, 93"-"企画-96", 28 Mar. 2005
Japanese

キャリア浮選を用いた白色結晶質石灰石の高品位化
恒川 昌美, 本間 佑吾, 柳 庚槿, 広吉 直樹, 伊藤 真由美, 春季大会講演集. I, 資源編, 17, 2, 53, 54, 28 Mar. 2005
Japanese

低比重細粒破砕物のジグ選別における粒子流動性と最適分離条件
恒川 昌美, 堀 邦紘, 上田 将経, 越智 大司, 広吉 直樹, 伊藤 真由美, 伊藤 正澄, 春季大会講演集. I, 資源編, 17, 2, 55, 56, 28 Mar. 2005
Japanese

プラスチックのジグ選別における粒子物性の影響
恒川 昌美, 上田 将経, 堀 邦紘, 越智 大司, 広吉 直樹, 伊藤 真由美, 伊藤 正澄, 春季大会講演集. I, 資源編, 17, 2, 57, 58, 28 Mar. 2005
Japanese

物理選別による廃2次電池中の有価物回収(第2報)
恒川 昌美, 古谷 尚稔, 広吉 直樹, 伊藤 真由美, 北村 修, 市川 良二, 菊田 和幸, 春季大会講演集. I, 資源編, 17, 2, 63, 64, 28 Mar. 2005
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究
伊藤 真由美, 久保 泰政, 広吉 直樹, 恒川 昌美, 春季大会講演集. I, 資源編, 17, 2, 145, 146, 28 Mar. 2005
Japanese

再生粗骨材を用いたコンクリートの強度に及ぼす湿式選別条件の影響
恒川 昌美, 上杉 浩平, 伊藤 真由美, 伊藤 正澄, 名和 豊春, 西田 法文, 広吉 直樹, 平島 剛, 春季大会講演集. I, 資源編, 17, 2, 173, 174, 28 Mar. 2005
Japanese

低品位黒曜石の資源化
山口英志, 恒川昌美, 広吉直樹, 伊藤真由美, 資源・素材, 2005, 50, 2005
Japanese

Leaching Cementation Separation~重金属汚染土壌の新しい修復法~
伊藤真由美, 久保泰政, 広吉直樹, 恒川昌美, 資源・素材, 2005, 66, 2005
Japanese

ジグ選別におけるプラスチック粒子の分離挙動
恒川昌美, 越智大司, 堀邦紘, 上田将経, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材, 2005, 55, 2005
Japanese

廃プラスチックの選別技術
伊藤真由美, 資源・素材, 2005, C/D, 73, 76, 2005
Japanese

プラスチックのジグ選別における表面物性の影響
恒川昌美, 上田将経, 堀邦紘, 越智大司, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材, 2005, 56, 2005
Japanese

プラスチックのジグ選別―最適分離条件と粒子の流動
堀邦紘, 恒川昌美, 上田将経, 越智大司, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材, 2005, 57, 2005
Japanese

ジグ選別における粒子の分離挙動と選別性の簡易評価
恒川昌美, 越智大司, 堀邦紘, 上田将経, 広吉直樹, 伊藤真由美, 伊藤正澄, 資源・素材学会北海道支部春季講演会講演要旨集, 2005, 61, 62, 2005
Japanese

鉛汚染土壌からの鉛分リーチングおよび鉛濃縮に関する基礎的研究
伊藤真由美, 久保泰政, 広吉直樹, 恒川昌美, 地下水・土壌汚染とその防止対策に関する研究集会講演集(CD-ROM), 11th, ROMBUNNO.S1-18, 2005
Japanese

マイクロフォーカスX線CTを用いた高電圧破壊試験試料の観察について
横田光博, ちょう祥こう, 伊藤真由美, 中宮優子, 大和田秀二, 金子勝比古, 資源・素材学会北海道支部春季講演会講演要旨集, 2005, 19, 20, 2005
Japanese

マイクロフォーカスX線CTを用いた高電圧破壊試験試料の観察について
横田光博, ちょう祥こう, 伊藤真由美, 金子勝比古, 中宮優子, 大和田秀二, 資源・素材, 2005, 43, 2005
Japanese

The 7th International Symposium on East Asian Resources Recycling Technology (EARTH2003)
伊藤 真由美, Journal of the Mining and Materials Processing Institute of Japan, 120, 10, 611, 614, 25 Nov. 2004
資源・素材学会, Japanese

赤泥中の鉄分の存在状態および磁選による分離・濃縮
岡島大, 伊藤真由美, 大和田秀二, 資源・素材, 2004, 96, 14 Sep. 2004
Japanese

単体分離促進のための電気パルスによる選択粉砕機構の解明~石炭含有鉱物の粉砕性は何で決まるのか~
伊藤真由美, 中川剛直, 名児耶勉, 大和田秀二, 資源・素材, 2004, 95, 14 Sep. 2004
Japanese

鉱物処理における新しい破砕・粉砕技術~IMPC2003粉砕に関する論文~
伊藤真由美, 大和田秀二, 資源・素材, 2004, C/D, 173, 176, 14 Sep. 2004
Japanese

2.3.1 コールクリーニング(2.3 石炭の加工と輸送技術,2. 石炭,II エネルギー資源の利用技術の進展と研究動向,平成15年における重要なエネルギー関係項目)
恒川 昌美, 伊藤 真由美, 日本エネルギー学会誌, 83, 8, 587, 588, 20 Aug. 2004
一般社団法人日本エネルギー学会, Japanese

鉛汚染土壌の凝集・分散性および物理的洗浄方法の検討
大和田秀二, 伊藤真由美, 鈴木寛子, 寺田尚史, 地下水・土壌汚染とその防止対策に関する研究集会講演集, 10th, 750, 753, Jul. 2004
Japanese

ハイパーコール製造のための脱アルカリ技術―水溶液中でNa吸着させたY型ゼオライトの再生処理と非水溶液中のNa吸着挙動―
伊藤真由美, 白山雄一, 大和田秀二, 山下亨, 安藤隆, 篠崎貞行, 山内洋幸, 資源・素材学会春季大会講演集, 16, 2, 160, 161, 29 Mar. 2004
Japanese

粉砕における連続的破壊を考慮した優先破壊・単体分離モデルの提案
大和田秀二, 伊藤真由美, 織田竜輔, 大宮隆之, 資源・素材学会春季大会講演集, 16, 2, 17, 18, 29 Mar. 2004
Japanese

解砕‐分級による汚染土壌からの重金属微粒子の除去に関する基礎的研究―重金属微粒子の存在形態把握および土粒子と重金属微粒子の分散性に及ぼす各種因子の影響―
大和田秀二, 伊藤真由美, 鈴木寛子, 寺田尚史, 資源・素材学会春季大会講演集, 16, 2, 158, 159, 29 Mar. 2004
Japanese

粉砕における連続的破壊を考慮した優先破壊・単体分離モデルの提案
大和田 秀二, 伊藤 真由美, 織田 竜輔, 大宮 隆之, 春季大会講演集. I, 資源編, 16, 2, 17, 18, 29 Mar. 2004
Japanese

解砕-分級による汚染土壌からの重金属微粒子の除去に関する基礎的研究 : 重金属微粒子の存在形態把握および土粒子と重金属微粒子の分散性に及ぼす各種因子の影響
大和田 秀二, 伊藤 真由美, 鈴木 寛子, 寺田 尚史, 春季大会講演集. I, 資源編, 16, 2, 158, 159, 29 Mar. 2004
Japanese

ハイパーコール製造のための脱アルカリ技術 : 水溶液中でNa吸着させたY型ゼオライトの再生処理と非水溶液中のNa吸着挙動
伊藤 真由美, 白山 雄一, 大和田 秀二, 山下 亨, 安藤 隆, 篠崎 貞行, 山内 洋幸, 春季大会講演集. I, 資源編, 16, 2, 160, 161, 29 Mar. 2004
Japanese

Removal of Alkaline and Alkaline-Earth Metals for Hyper Coal Production-Alkaline and Alkaline-Earth Metals Removal Test with Zeolite Under the High Temperatures and Pressures Conditions, and Removal Test of Dissolving Sodium in Nonpolar Solvent-
ITO MAYUMI, OWADA SHUJI, ANDO TAKASHI, YAMASHITA TOORU, SHINOZAKI SADAYUKI, YAMAUCHI HIROYUKI, 日本エネルギー学会石炭科学会議発表論文集, 40th, 40, 52, 53, 23 Oct. 2003
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. "Hyper-Coal" is a fuel to the direct coal injection, and must be extremely low ash and low alkaline and alkaline-earth metals concentration. In this paper, in order to incorporate "alkaline and alkaline-earth metals removal process" into "coal solvent extraction process", the ion exchange treatment with H-Y zeolite were investigated under high temperature and pressure condition (360℃, 10atm). Agglomeration test of the zeolite and Removal Test of Dissolving Sodium in Nonpolar Solvent were also examined., The Japan Institute of Energy, Japanese

25. Removal of Alkaline and Alkaline-Earth Metals for Hyper Coal Production : Alkaline and Alkaline-Earth Metals Removal Test with Zeolite Under the High Temperatures and Pressures Conditions, and Removal Test of Dissolving Sodium in Nonpolar Solvent
Ito Mayumi, Owada Syuji, Ando Takashi, Yamashita Toru, Shinozaki Sadayuki, Yamauchi Hiroyuki, 石炭科学会議発表論文集, 0, 40, 52, 53, 23 Oct. 2003
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. "Hyper-Coal" is a fuel to the direct coal injection, and must be extremely low ash and low alkaline and alkaline-earth metals concentration. In this paper, in order to incorporate "alkaline and alkaline-earth metals removal process" into "coal solvent extraction process", the ion exchange treatment with H-Y zeolite were investigated under high temperature and pressure condition (360℃, 10atm). Agglomeration test of the zeolite and Removal Test of Dissolving Sodium in Nonpolar Solven..., The Japan Institute of Energy, Japanese

産地の異なる石炭の電気パルス粉砕性の比較 (その2)
大和田秀二, 伊藤真由美, 西村威彦, 資源・素材学会春季大会講演集, 15, 2, 186, 187, 27 Mar. 2003
Japanese

粉砕産物の単体分離性に及ぼす構成成分の圧縮強度およびVickers硬度の影響
大和田秀二, 伊藤真由美, 織田竜輔, 資源・素材学会春季大会講演集, 15, 2, 220, 221, 27 Mar. 2003
Japanese

産地の異なる石炭の電気パルス粉砕性の比較(その2)
大和田 秀二, 伊藤 真由美, 西村 威彦, 春季大会講演集. I, 資源編, 15, 2, 186, 187, 27 Mar. 2003
Japanese

粉砕産物の単体分離性に及ぼす構成成分の圧縮強度および Vickers 硬度の影響
大和田 秀二, 伊藤 真由美, 織田 竜輔, 春季大会講演集. I, 資源編, 15, 2, 220, 221, 27 Mar. 2003
Japanese

アドバンスト・ミネラルプロセッシング技術の開発に関する調査研究
平島剛, 広吉直樹, 恒川昌美, 大木達也, 伊藤真由美, 大和田秀二, 長岡亨, 日本鉱業振興会助成研究成果報告書, 2002, 65, 70, 08 Nov. 2002
Japanese

Removal of Alkaline and Alkaline-Earth Metals for Hyper Coal Production. Application of Inorganic Ion-Exchange Material.
ITO MAYUMI, ANDO TAKASHI, YAMASHITA TOORU, SHINOZAKI SADAYUKI, 日本エネルギー学会石炭科学会議発表論文集, 39th, 103, 104, 29 Oct. 2002
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. Gas turbine blades are particularly susceptible to ash particles as they erode the blades by impinging on them as well as forming deposits that can corrode the blades at their high operating temperatures. In particular, the concentration of alkaline and alkaline-earth metals, which have great impact on the erosion and corrosion of turbine blades, must be extremely low level. In order to produce "Hyper Coal", the ion exchange treatments using inorganic ion-exchange material were investigated for removing Na, K, Ca and Mg from solvent extracted coal., The Japan Institute of Energy, Japanese

43. Removal of Alkaline and Alkaline-Earth Metals for Hyper Coal Production : Application of Inorganic Ion-Exchange Material
Ito Mayumi, Ando Takashi, Yamashita Toru, Shinozaki Sadayuki, Proceedings of Conference on Coal Science, 0, 39, 103, 104, 29 Oct. 2002
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. Gas turbine blades are particularly susceptible to ash particles as they erode the blades by impinging on them as well as forming deposits that can corrode the blades at their high operating temperatures. In particular, the concentration of alkaline and alkaline-earth metals, which have great impact on the erosion and corrosion of turbine blades, must be extremely low level. In order to produce "Hyper Coal", the ion exchange treatments using inorganic ion-exchange material were inv..., The Japan Institute of Energy, Japanese

アドバンスドミネラルプロセッシングと最新の資源リサイクリング技術 次世代高効率発電用新燃料の製造 ハイパーコール(完全無灰炭)製造プロジェクトの紹介
伊藤真由美, 山下亨, 安藤隆, 篠崎貞行, 資源・素材, 2002, C/D, 65, 68, 23 Sep. 2002
Japanese

選択粉砕を目的とした電気パルス粉砕の石炭への適用
西村威彦, 中畑慎介, 伊藤真由美, 大和田秀二, 資源・素材, 2002, 79, 23 Sep. 2002
Japanese

ハイパーコール製造のためのイオン交換法による脱アルカリ
伊藤真由美, 資源・素材, 2002, 90, 23 Sep. 2002
Japanese

第6回東アジア資源リサイクリングシンポジウム参加報告
伊藤 真由美, 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan, 118, 8, 574, 575, 25 Aug. 2002
Japanese

優先破壊を考慮した単体分離モデルおよびそれを用いた選別後の品位・回収率の予測
大和田秀二, 伊藤真由美, 黒川和成, 資源・素材学会春季大会講演集, 14, 2, 60, 61, 28 Mar. 2002
Japanese

PET,PVCの浮選における湿潤剤のイオン性と鎖長さおよび温度の影響
大和田秀二, 伊藤真由美, 金崎元彦, 資源・素材学会春季大会講演集, 14, 2, 233, 234, 28 Mar. 2002
Japanese

産地の異なる石炭の電気パルス粉砕性の比較
大和田秀二, 伊藤真由美, 西村威彦, 畠山信之助, 山下亨, 大木達也, 藤田豊久, 資源・素材学会春季大会講演集, 14, 2, 54, 55, 28 Mar. 2002
Japanese

有機・無機イオン交換剤を用いたハイパーコール製造のための脱アルカリ技術
伊藤真由美, 山下亨, 安藤隆, 篠崎貞行, 大和田秀二, 資源・素材学会春季大会講演集, 14, 2, 56, 57, 28 Mar. 2002
Japanese

産地の異なる石炭の電気パルス粉砕性の比較
大和田 秀二, 伊藤 真由美, 西村 威彦, 畠山 信之助, 山下 亨, 大木 達也, 藤田 豊久, 春季大会講演集. I, 資源編, 14, 2, 54, 55, 28 Mar. 2002
Japanese

有機・無機イオン交換剤を用いたハイパーコール製造のための脱アルカリ技術
伊藤 真由美, 山下 亨, 安藤 隆, 篠崎 貞行, 大和田 秀二, 春季大会講演集. I, 資源編, 14, 2, 56, 57, 28 Mar. 2002
Japanese

優先破壊を考慮した単体分離モデルおよびそれを用いた選別後の品位・回収率の予測
大和田 秀二, 伊藤 真由美, 黒川 和成, 春季大会講演集. I, 資源編, 14, 2, 60, 61, 28 Mar. 2002
Japanese

PET、PVCの浮選における湿潤剤のイオン性と鎖長さおよび温度の影響
大和田 秀二, 伊藤 真由美, 金崎 元彦, 春季大会講演集. I, 資源編, 14, 2, 233, 234, 28 Mar. 2002
Japanese

資源・素材2001(札幌)秋季大会記 - 平成13年度資源・素材関係学協会合同秋季大会 - かでる2・7(札幌市) 2001年9月24〜26日
資源, 札幌実行委員会, 井上 拓, 伊藤 真由美, 草野 真樹, 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan, 117, 11, 913, 914, 25 Nov. 2001
資源・素材学会, Japanese

Removal of Alkaline and Alkaline-earth Metals for Hyper Coal Production.
ITO MAYUMI, ANDO TAKASHI, YAMASHITA TOORU, SHINOZAKI SADAYUKI, 日本エネルギー学会石炭科学会議発表論文集, 38th, 239, 242, 13 Nov. 2001
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. Gas turbine blades are particularly susceptible to ash particles as they erode the blades by impinging on them as well as forming deposits that can corrode the blades at their high operating temperatures. In particular, the concentration of alkaline and alkaline-earth metals, which have great impact on the erosion and corrosion of turbine blades, must be extremely low level. In order to produce "Hyper Coal", the ion exchange treatments were investigated for removing Na, K, Ca and Mg from solvent extracted coal., The Japan Institute of Energy, Japanese

58. Removal of Alkaline and Alkaline-earth Metals for Hyper Coal Production
Ito Mayumi, Ando Takashi, Yamashita Toru, Shinozaki Sadayuki, Proceedings of Conference on Coal Science, 0, 38, 239, 242, 13 Nov. 2001
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. Gas turbine blades are particularly susceptible to ash particles as they erode the blades by impinging on them as well as forming deposits that can corrode the blades at their high operating temperatures. In particular, the concentration of alkaline and alkaline-earth metals, which have great impact on the erosion and corrosion of turbine blades, must be extremely low level. In order to produce "Hyper Coal", the ion exchange treatments were investigated for removing Na, K, Ca and M..., The Japan Institute of Energy, Japanese

早稲田大学・大和田研究室 研究紹介 : 早稲田大学理工学部 環境資源工学科 資源循環工学分野
伊藤 真由美, 大和田 秀二, 資源・素材, 2001, 0, 23, 23, 24 Sep. 2001
Japanese

電気パルス粉砕の石炭への適応
西村 威彦, 畠山 信之助, 伊藤 真由美, 大和田 秀二, 資源・素材, 2001, 0, 25, 25, 24 Sep. 2001
Japanese

エアテーブルを用いた細粒石炭の乾式選別
山下亨, 伊藤真由美, 大井英節, 石田徹, 資源・素材学会春季大会講演集, 2, 123, 124, 29 Mar. 2001
Japanese

電気パルス粉砕による石炭の集合粉砕
大和田秀二, 太田智絵, 西村威彦, 伊藤真由美, 小野重好, 山下亨, 大木達也, 藤田豊久, 資源・素材学会春季大会講演集, 2, 109, 110, 29 Mar. 2001
Japanese

電気パルス粉砕による石炭の集合粉砕
大和田 秀二, 太田 知絵, 西村 威彦, 伊藤 真由美, 小野 重好, 山下 亨, 大木 達也, 藤田 豊久, 一般発表(研究・業績発表)講演要旨集, 2001, 2, 109, 110, 01 Mar. 2001
Japanese

エアテーブルを用いた細粒石炭の乾式選別
山下 亨, 伊藤 真由美, 大井 英節, 石田 徹, 一般発表(研究・業績発表)講演要旨集, 2001, 2, 123, 124, 01 Mar. 2001
Japanese

Removal of alkaline and alkaline earth metals from coal.
ONO SHIGEYOSHI, YAMASHITA TOORU, ITO MAYUMI, OWADA SHUJI, SHINOZAKI SADAYUKI, 日本エネルギー学会石炭科学会議発表論文集, 37th, 97, 100, 28 Sep. 2000
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. In this case, feed coal must be ash-free and alkaline and alkaline earth metal-free to prevent erosion and corrosion of turbine blade. In this study, ion exchange treatment of coal was investigated to remove Na, K, Ca and Mg., The Japan Institute of Energy, Japanese

23. Removal of alkaline and alkaline earth metals from coal
Ono Sigeyoshi, Yamashita Toru, Ito Mayumi, Owada Shuji, Shinozaki Sadayuki, Proceedings of Conference on Coal Science, 0, 37, 97, 100, 28 Sep. 2000
Direct coal injection to a gas turbine is expected as an advanced high efficiency power generation technology. In this case, feed coal must be ash-free and alkaline and alkaline earth metal-free to prevent erosion and corrosion of turbine blade. In this study, ion exchange treatment of coal was investigated to remove Na, K, Ca and Mg., The Japan Institute of Energy, Japanese

高硫黄石炭ずり浸出水の水質制御に関する基礎的研究
伊藤真由美, 山田龍一, 恒川昌美, 平島剛, 広吉直樹, 資源・素材学会春季大会講演集, 2, 17, 29 Mar. 1999
Japanese

石炭の脱硫浮選に関する基礎的研究 (第3報)
伊藤真由美, 湯川健太郎, 恒川昌美, 平島剛, 広吉直樹, 資源・素材学会春季大会講演集, 2, 18, 29 Mar. 1999
Japanese

石炭浮選における脱灰性評価法
恒川 昌美, 今 行忠, 平島 剛, 広吉 直樹, 伊藤 真由美, 一般発表(研究・業績発表)講演要旨集, 1997, 1, 186, 186, 25 Mar. 1999
Japanese

石炭の脱流浮選に関する基礎的研究
伊藤 真由美, 恒川 昌美, 平島 剛, 広吉 直樹, 一般発表(研究・業績発表)講演要旨集, 1997, 1, 187, 187, 25 Mar. 1999
Japanese

高硫黄石炭ずり浸出水の水質制御に関する基礎的研究
伊藤 真由美, 山田 龍一, 恒川 昌美, 平島 剛, 広吉 直樹, 一般発表(研究・業績発表)講演要旨集, 1999, 2, 17, 17, 01 Mar. 1999
Japanese

石炭の脱硫浮選に関する基礎的研究(第3報)
伊藤 真由美, 湯川 健太郎, 恒川 昌美, 平島 剛, 広吉 直樹, 一般発表(研究・業績発表)講演要旨集, 1999, 2, 18, 18, 01 Mar. 1999
Japanese

石炭の脱硫浮選に関する基礎的研究 (第2報)
伊藤真由美, 恒川昌美, 平島剛, 広吉直樹, 資源・素材学会春季大会講演集, 21, Mar. 1998
Japanese

微粉炭浮選における脱灰性の評価と鉱物質単体分離度の推定
恒川昌美, 今行忠, 伊藤真由美, 平島剛, 広吉直樹, 資源・素材学会春季大会講演集, 22, Mar. 1998
Japanese

石炭の脱硫浮選に関する基礎的研究(第2報)
伊藤 真由美, 恒川 昌美, 平島 剛, 広吉 直樹, 一般発表(研究・業績発表)講演要旨集, 1998, 2, 21, 21, 01 Mar. 1998
Japanese

微粉炭浮選における脱灰性の評価と鉱物質単体分離度の推定
恒川 昌美, 今 行忠, 伊藤 真由美, 平島 剛, 広吉 直樹, 一般発表(研究・業績発表)講演要旨集, 1998, 2, 22, 22, 01 Mar. 1998
Japanese

Desulfurization flotation of imaginary high sulfur coal using the ferruginous solution.
ITO MAYUMI, YUKAWA KENTARO, TSUNEKAWA MASAMI, HIRASHIMA TSUYOSHI, HIROYOSHI NAOKI, 資源・素材学会北海道支部春季講演会講演要旨集, 1998, 15, 16, 1998
Japanese

Basic research on property control of the leach from high sulfur coal.
ITO MAYUMI, YAMADA RYUICHI, TSUNEKAWA MASAMI, HIRASHIMA TSUYOSHI, HIROYOSHI NAOKI, 資源・素材学会北海道支部春季講演会講演要旨集, 1998, 17, 18, 1998
Japanese

Basic research on the desulfurization flotation of coal.
ITO MAYUMI, TSUNEKAWA MASAMI, HIRAJIMA TSUYOSHI, HIROYOSHI NAOKI, 資源・素材学会研究・業績発表講演会講演要旨集, 1997, 187, Mar. 1997
Japanese

Deashing ability evaluation method in coal flotation.
TSUNEKAWA MASAMI, IMAYUKI TADASHI, HIRAJIMA TSUYOSHI, HIROYOSHI NAOKI, ITO MAYUMI, 資源・素材学会研究・業績発表講演会講演要旨集, 1997, 186, Mar. 1997
Japanese

Mineral Bioprocessingへの挑戦〜北大・鉱物処理工学研究室における最近の研究〜
伊藤 真由美, 恒川 昌美, 平島 剛, 広吉 直樹, 笹木 圭子, 資源・素材, 1996, 1, 67, 67, 21 Oct. 1996
Japanese

強酸性領域における黄鉄鉱の浮選挙動
伊藤 真由美, 広吉 直樹, 恒川 昌美, 平島 剛, 一般発表(研究・業績発表)講演要旨集, 1996, 1, 153, 153, 29 Mar. 1996
Japanese

Flotation behavior of pyrite in a strong acidity region.
ITO MAYUMI, HIROYOSHI NAOKI, TSUNEKAWA MASAMI, HIRAJIMA TSUYOSHI, 資源・素材学会研究・業績発表講演会講演要旨集, 1996, 153, Mar. 1996
Japanese

Feed grain size and limitative ash content in coal flotation.
TSUNEKAWA MASAMI, KON YUKITADA, HIRAJIMA TSUYOSHI, ITO MAYUMI, HIROYOSHI NAOKI, 資源・素材学会北海道支部春季講演会講演要旨集, 1996, 5, 6, 1996
Japanese

鉄酸化細菌の増殖挙動の簡便測定法とその応用 : ポリオキシエチレン化合物存在下での増殖挙動の把握
広吉 直樹, 伊藤 真由美, 恒川 昌美, 平島 剛, 一般発表(研究・業績発表)講演要旨集, 1995, 1, 33, 33, 28 Mar. 1995
Japanese

鉄酸化細菌の増殖挙動の簡便測定法とその応用 ポリオキシエチレン化合物存在下での増殖挙動の把握
広吉直樹, 伊藤真由美, 恒川昌美, 平島剛, 資源・素材学会研究・業績発表講演会講演要旨集, 1995, 33, Mar. 1995
Japanese

鉄酸化細菌の簡便な増殖測定法
広吉直樹, 伊藤真由美, 恒川昌美, 平島剛, 資源・素材学会北海道支部春季講演会講演要旨集, 1994, 3, 4, 1994
Japanese

Comparison of the suppressive effect of ferric- and ferrous-catechol complexes on pyrite oxidation　　　　　　　　　　　　　　　
X. Li, N. Hiroyoshi, K. Naruwa, M. Ito, C.B. Tabelin, Proceedings of International Symposium on Earth Science and Technology, 605, 607
English, Summary international conference

プラスチックのケミカルリサイクル技術　　　　　　　　　　　　　　　
監修 吉岡敏明, 第III編 湿式法 ＜選別＞ 比重選別および浮遊選別
シーエムシー出版, Sep. 2021, [Contributor]

バリューチェーンと単位操作から見たリサイクル　　　　　　　　　　　　　　　
化学工学会, 環境部会リサイクル分科会著, 第2章技術編 2.1.2物理選別
三恵社, Dec. 2020, [Contributor]

海底鉱物資源の産業利用　　　　　　　　　　　　　　　
伊藤 真由美, 96-112
シーエムシー出版，東京, 2013, [Contributor]

Development of gold extraction method for green mining and its application to refractory ore processing
Grants-in-Aid for Scientific Research
01 Apr. 2023 - 31 Mar. 2026
廣吉 直樹, 伊藤 真由美, PARK ILHWAN
硫ヒ鉄鉱などの硫化鉱物の結晶中に金が閉じ込められた形で存在する難処理金鉱石から，毒性の高いシアンに替わる安全な溶媒を用いて金を抽出する技術を開発することを目指して，チオ硫酸アンモニア溶液を用いたヒ素含有難処理鉱から金の浸出・回収法について検討した.
金粉末と硫ヒ鉄鉱の混合物を用いたモデル実験を行い, チオ硫酸アンモニウム溶液中での金の抽出に及ぼす硫ヒ鉄鉱の影響を調べた. このモデル実験では硫化鉱物の結晶中に金が含まれているわけではないが, それでも硫ヒ鉄鉱が共存すると金の抽出率が著しく低下した.SEM-EDX や XPS による表面分析の結果, 浸出の過程で金の表面には硫化銅, 酸化鉄および元素硫黄などの薄膜が生成することが確かめられたが, この薄膜は硫ヒ素鉄鉱の共存の有無に関わらず生成しており, 金の浸出を抑制する不動態膜とは考えられない．溶液分析の結果によれば, 硫ヒ鉄鉱が共存する場合には存在しない時よりも急速に 金の浸出に不可欠なチオ硫酸イオンが分解することが確かめられたことから, 硫ヒ鉄鉱の共存によるチオ硫酸イオンの分解が金浸出抑制の主原因であるものと考えられる.
浸出貴液からの金の回収法として，アルミニウムを電子供与体，活性炭を電子伝達媒体粒子とするセメンテーション法について検討した．溶液分析や電子顕微鏡観察などの結果，金はアルミニウムの表面に付着した活性炭上に還元析出して回収されることが確認された．活性炭を用いた場合，溶液中に浸出触媒として含まれる銅も金とともに非選択的に還元析出してしまったが，活性炭の代わりに半導体性の酸化鉄 (マグネタイトあるいはヘマタイト) を用いて実験したところ，金のみが選択的に還元析出することを見出した．
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 23K04642

Technology to reduce transfer, accumulation, and toxic effects on organisms and humans without reducing heavy metal concentrations in contaminated soil
Grants-in-Aid for Scientific Research
Apr. 2023 - Mar. 2026
中山 翔太, 伊藤 真由美, 山崎 淳平, 江口 哲史, 内田 義崇
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 23K28235

銅精鉱の安定供給に向けた難処理銅鉱石のカスタマイズ処理条件を提示するプロトコ ールの策定　　　　　　　　　　　　　　　
金属資源の生産技術に関する基礎研究
Jun. 2022 - Mar. 2023
伊藤真由美, パク イルファン
(独）石油天然ガス・金属鉱物資源機構, 北海道大学, Principal investigator

銅亜鉛分離浮選における亜鉛鉱物抑制機構の解明のための基礎研究」/閃亜鉛鉱の浮遊性に及ぼす各種因子の影響把握と，閃亜鉛鉱と銅鉱物の浮選速度差の増大のための手法の開発　　　　　　　　　　　　　　　
金属資源の生産技術に関する基礎研究
Jun. 2021 - Mar. 2022
伊藤真由美, パク イルファン
(独）石油天然ガス・金属鉱物資源機構, 北海道大学, Principal investigator

ザンビア鉱山地区における鉛汚染環境および鉛中毒対策としてのリスクベースアプローチの実践と効果検証　　　　　　　　　　　　　　　
Axis
Apr. 2020 - Mar. 2022
研究代表者, 石塚真由美
JST, 北海道大学, Coinvestigator

ザンビアにおける鉛汚染のメカニズムの解明と健康・経済リスク評価手法および予防・修復技術の開発　　　　　　　　　　　　　　　
SATREPS
Jun. 2015 - Mar. 2022
研究代表者, 石塚真由美
JICA-JST, 北海道大学, Coinvestigator

銅亜鉛分離浮選における亜鉛鉱物抑制機構の解明のための基礎研究」/閃亜鉛鉱の浮遊性に及ぼす各種因子の影響把握と，閃亜鉛鉱と銅鉱物の浮選速度差の増大のための手法の開発　　　　　　　　　　　　　　　
金属資源の生産技術に関する基礎研究
Jun. 2020 - Mar. 2021
伊藤真由美
(独）石油天然ガス・金属鉱物資源機構, 北海道大学, Principal investigator

New development on carrier micro-encapsulation for prevending acid mine drainage formation
Grants-in-Aid for Scientific Research
01 Apr. 2017 - 31 Mar. 2020
Hiroyoshi Naoki
Carrier micro-encapsulation (CME) was studied as a new method to suppress oxidative dissolution of pyrite, causing the formation of acid mine drainage. A novel technique of CME using Fe or Al ions, which are easy to be obtained at mine site, was proposed and its suppressive effects on pyrite dissolution was confirmed based on electrochemical studies and surface analysis. When Ti and Fe-catecholate complexes coexisted, a high acid resistant protective coating was formed on pyrite surface, and it suppressed cathodic reduction of oxygen on the mineral surface and pyrite oxidation.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 17H03503

Selective recovery of precious metals from solution using magnetite
Grants-in-Aid for Scientific Research
01 Apr. 2011 - 31 Mar. 2014
HIROYOSHI Naoki, ITO Mayumi, FUKUSHIMA Masami
A new method to recover precious metals like gold and platinum group metals selectively from the solutions containing common metal ions. Reduction potential of the precious metal ions are high and they are reduced and precipitated on magnetite surface, but reduction potential of common metals like copper and zinc are lower than that of magnetite and they are not reduced on magnetite surface. Magnetic separation can be used to recover precious metal loaded magnetite from the suspension of precious metal ores and scraps. It was confirmed that slag magnetite (a magnetic portion of crushed copper converter slag) can be used to recover precious metals.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 23360398

Self-sealability of fractures in rock and its application to fracture and strength control
Grants-in-Aid for Scientific Research
2010 - 2012
KANEKO Katsuhiko, KAWASAKI Satoru, NARA Yoshitaka, ITO Mayumi, MUKUNOKI Toshifumi, HIROYOSHI Naoki, SAKAGUCHI Kiyotoshi, HARADA Syusaku
A series of experimental studies on the sealability of fracture has been performed and its application to geotechnical engineering has been discussed. Firstly, analyzing the influence of environments on the sub-critical crack growth in rock, the mechanism of crack growth has been clarified. Secondarily, the self-sealing process of fracture in the rocklike material in water was investigated and the mechanism of self-sealing was clarified. Thirdly, the process of fracture propagation was analyzed numerically and a design method to control fracture propagation, i.e., crack orientation and so on. From these results, a method to estimate the long-term strength of rock has been proposed. Furthermore it is pointed out that the strength of rock can be controlled by controlling the environmental condition.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 22246114

Advanced jig separation technology for resource recycling and wettability control of plastics
Grants-in-Aid for Scientific Research
2011 - 2011
ITO Mayumi, HIROYOSHI Naoki
Industrial systems and daily life in Japan are shifting to a society based on recycling to reduce energy and resource consumption and efficient separation technology of valuable component from used products is important. The authors have developed the RETAC jig (a modified TACUB jig) and the RETAC jig can separate relatively low density particles such as plastics. To further improve the separation ability, a hybrid jig (a RETAC jig with an air bubbler under the particle bed), which can separate plastics having similar specific gravities by the differences in the wettabilities of the particles was developed. Surface modification of plastics with similar wettability enabling separation in the hybrid jig and precise control of the wettability of plastic surfaces are investigated. Effect of bubble size on apparent density of particles was also investigated and recovery system of floating and suspending particles was developed.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 23560990

Mineral processing of deep sea resources
Grants-in-Aid for Scientific Research(若手研究(B))
2008 - 2010
Mayumi ITO
Cobalt-rich ferromanganese crust/nodules are unused resources where the commercial potential will depend on trends in mining and treatment costs of onshore mines. In this study physical separation methods to concentrate valuable components from the substrate rocks were investigated. Liberation ratios of crushed products were measured and separation of fine fraction was carried out using RETAC jig and advanced jig. Treatment flow chart of cobalt-rich ferromanganese crust/nodules was proposed.
Ministry of Education, Culture, Sports, Science and Technology, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 20760567

Application of carrier-microencapsulation for coal flotation to remove pyrite and to suppress acid mine drainage formation at tailing dam
Grants-in-Aid for Scientific Research(基盤研究(B))
2008 - 2010
Naoki HIROYOSHI, Masami TSUNEKAWA, Mayumi ITO, Toshifumi IGARASHI, Masami FUKUSHIMA
Pyrite associated with coal generates SOx causing acid rain during coal combustion. In coal preparation, pyrite is rejected as a gangue mineral using the physical separation technique such as froth flotation and wasted into tailing pond. In the froth flotation, pyrite is frequently entrapped in froth together with valuable mineral due to its hydrophobic nature. Formation of acid mine drainage due to the air-oxidation of pyrite in tailing pond is also a serious problem. In the present study, carrier-microencapsulation (CME) is proposed to suppress both the floatability and oxidation of pyrit...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 20360401

分けるのは訳ないリサイクル用ハイパー比重選別機の開発
科学研究費補助金(挑戦的萌芽研究)
2009 - 2009
恒川 昌美, 廣吉 直樹, 伊藤 真由美
研究代表者および分担者らの研究室で開発した網下気室型湿式比重選別機(TACUB JIG)をベースにして,より選別効率の高い比重選別機の開発に取り組み,以下に述べる3タイプの新しい比重選別機を開発した。1)TACUB JIGのフィード部および産物回収部に改良を加え,さらに制御法を工夫して,廃棄物の資源化・リサイクルに適した比重選別機(RETAC JIG)を開発し,種々のプラスチックを素材別に選別することを可能にした。2)このRETAC JIGをベースにして,比重差が無くても濡れ性に差があれば比重選別できるHybrid JIGを開発した。この選別機では,気泡を導入して,より疎水性の粒子表面に微細気泡を選択的に付着させることで,その見かけ比重を小さくして,物質間に見かけ比重差を生じさせて,比重分離する。このJIGにより,比重の同じプラスチックの相互選別が可能になった。3)水より軽い物質相互を分離するため,RETAC JIGの選別槽上部に天網を設置し,この天網の下にフィードして上下に脈動を与えることで,天網下部に比重別に産物を成層させて選別できるREVERSE JIGを開発した。4)上述の新たに開発した3タイプの比重選別機をあわせてAdvanced JIGと総称し,本Advanced JIGを組み合わせることで廃家電リサイクルプラントから排出されるプラスチックを素材別に選別して,マテ...
文部科学省, 挑戦的萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 21656232

Study on Micro-Restructuring of Rocklike Materials
Grants-in-Aid for Scientific Research(基盤研究(A))
2007 - 2009
Katsuhiko KANEKO, Hiroshi TAKAHASHI, Toshifumi IGARASHI, Tsutomu SATO, Sumihiko MURATA, Satoru KAWASAKI, Mayumi ITO
A series of experimental studies for the micro-restructuring of rocklike materials has been carried out. Various techniques to improve the physical properties of rocklike materials by reconstructing their microstructures have been developed, i.e., a method to change the rock strength by controlling of micro-cracking, a grout technique using microorganisms, a sealing technique using mineral separation from the ground water and so on.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(A), 北海道大学, Coinvestigator not use grants, Competitive research funding, 19206095

生分解性錯体と易分離性媒体を用いたアースコンシャス汚染土壌浄化
科学研究費補助金(若手研究(B))
2005 - 2007
伊藤 真由美
現在,日本で行われている重金属汚染土の物理洗浄法(物理選別)は,欧米方式をそのまま採用しているが,この方法では重金属微粒子と土微粒子の物理選別ができないため,微粒群は全量,最終処分対象となり,微粒土の割合が欧米に比べて高い日本では,最終処分する微粒土が多量に発生するという問題が生じている。そこで本研究では,限られた形態の重金属しか除去できなかった既存の処理法に化学的前処理を融合させ,重金属の存在形態の転換を図ることで各種形態の重金属の物理選別を可能にする土壌処理プロセスを考案し,検討している。具体的には1)環境中で容易に分解する錯体を用いて重金属を可溶化し,2)可溶化した重金属を媒体表面にセメンテーションの原理を利用して選択濃縮し,3)この重金属が濃縮した媒体を物理選別で精度よく分離・除去する方法の開発を目的としている。本年度は最終年度である。初年度は「模擬試料を用いた各工程の個別試験」を行い,2年度は「実汚染土壌を用いた処理試験」を行なった。最終年度(本年度)は,実汚染土壌の処理に際しての処理条件の最適化および処理を阻害する因子の検討を行い,考案した処理手法の有用性を確かめることができた。以上のように,おおよそ研究実施計画通りに研究を順調に進めることができた。
文部科学省, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 17760654

Advanced Heap-leaching for Chalcopyrite
Grants-in-Aid for Scientific Research(基盤研究(B))
2005 - 2007
Naoki HIROYOSHI, 恒川 昌美, 米田 哲朗, 伊藤 真由美
Heap-leaching has become important in copper production: over 20% of copper in the world is now produced at open pit mines of porphyry copper deposits through this method. In this method, copper in low-grade oxide and secondary sulfide ores is extracted into sulfuric acid solutions, and the extracted copper is recovered by solvent-extraction and electro-winning methods. However, the leaching rate of chalcopyrite (CuFeS_2), a major copper mineral in the deepest parts of the deposits, is very slow, and the development of advanced heap-leaching methods for this mineral is an object for copper ...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 17360427

有機・無機複合廃棄物のハイパー解砕・資源化技術の開発
科学研究費補助金(萌芽研究)
2005 - 2007
恒川 昌美, 柳 庚槿, 廣吉 直樹, 伊藤 真由美, 米田 哲朗, 吉田 豊
循環型社会を構築していくうえで鍵を握るのは,都市域における廃棄物の資源化・リサイクル技術および環境保全技術の開発である。我々は,廃自動車や廃家電・OA機器類の資源化技術を開発してきている。この開発過程で,現状の処理プロセスでは解砕・破砕が主として減容化を目的に行われているため,その後の有価物選別・回収の段階で低い選別精度,回収率にとどまること,解砕・破砕時に発生するシュレッダーダストの軽比重物(例えばウレタンなど)に絡み込んでいる有価物が十分に回収できないことを見出した。そこで種々の有機・無機複合廃棄物を効率的に資源化・リサイクルする立場から,解砕・破砕,選別を合理的に行うための要素技術の開発研究に取り組んだ。最終年度にあたる19年度は,下記のような検討を行い,有用な知見を得た。1)二つの使用済み自動車のシュレーダーダストを対象に,破砕後に種々の風力分級をして,産物について化学分析,灰分測定,組成解析などを行った。その結果,サーマルリサイクルに適した,ウレタンなどの可燃分からなる産物を回収できるプロセスの条件を明らかにした。2)ウレタン類に鉄・銅・アルミニウムなどの金属類,繊維などが絡まっている場合は,ある種の界面活性剤溶液に浸漬することで,有価金属類を分離回収できることを見出した。3)17〜19年度の成果を踏まえ,各種有機・無機複合廃棄物に対する適切な破砕・解砕法と有価物回...
文部科学省, 萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 17656293

Development of Urban Mines as Urban Resource Recovery Centers to Utilize Solid Waste and Create a Holonic Path for a Sustainable Society
Grants-in-Aid for Scientific Research(基盤研究(A))
2004 - 2007
Masami TSUNEKAWA, 廣吉 直樹, 伊藤 真由美, 米田 哲朗, 名和 豊春, 平島 剛
Industrial systems and daily life in Japan are shifting to become recycling-based to reduce energy and resource consumption. To establish a society based on recycling, urban resource recovery centers (urban mines) are important as places to reduce waste volumes, reusing and recycling valuable materials with application of mineral processing technology. The authors have studied advanced mineral processing technology for urban mines, and have developed new processes as described below. Based on these results, the creation of a holonic path in a sustainable society is discussed and proposed.1)...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(A), 北海道大学, Coinvestigator not use grants, Competitive research funding, 16206090

Quality Improvement of Pyrolysis Char Derived From Various Kind of Solid Waste for Recycling
Grants-in-Aid for Scientific Research(基盤研究(B))
2005 - 2006
田中 信壽, Toshihiko MATSUTO, 東條 安匡, 恒川 昌美, 広吉 直樹, 伊藤 真由美, 角田 芳忠
In this study, sixteen kinds of char obtained from various sources including industrial waste were used for experiments. In order to use char as fuel, chlorine level should be reduced to avoid corrosion. Chlorine in char derived from MSW was characterized in terms of solubility. CO2 bubbling could reduce chorine to acceptable level for cement kiln use. Pulverization was proven to be ineffective in the dissolution of non water-soluble chlorine.Ash content is another fraction which should be lowered for fuel use of char. Ash rich fraction (r<125 um) was subjected to float-sink separation, fro...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 17360435

キャリアマイクロエンカプセレーション 〜鉱山汚濁水発生防止のための新しい方法〜
科学研究費補助金(萌芽研究)
2005 - 2006
廣吉 直樹, 恒川 昌美, 伊藤 真由美
本研究では,鉱山酸性汚濁水の発生を防止する新しい方法としてキャリアマイクロエンカプセレーション(Carrier Micro Encapsulation, CME)を提案する.本法では,地殻中に存在するTiO_2などの鉱物中のTiを有機キャリアで水に可溶化して,汚染源となる黄鉄鉱FeS_2などの表面に吸着させた後,キャリアを分解して化学的に安定なTiO_2薄膜で汚染源を被覆し,水や空気から遮蔽する.昨年度の結果に基づき,Tiとの錯体形成能力や酸化分解性に優れたカテコール(1,2-dihydroxybenzene, C_6H_4(OH)_2)をキャリアとして選択し,黄鉄鉱粉末(粒子径53〜75μm)の溶解に対するCMEの効果を振盪フラスコ法によるモデル実験で調べた.実験は天然Ti鉱物の代替物として試薬アナターゼ(TiO_2)5kg/Lを用いて,黄鉄鉱-溶液比0.6kg/L,温度25℃,大気下で行った。CMEを施した実験(カテコールとTiO_2を添加した実験)では,黄鉄鉱表面にTiO_2あるいはTi(OH)_2の被膜が形成され、対照実験(カテコールとTiO_2の双方あるいは一方を添加しなかった実験)に比べて黄鉄鉱の溶解量(硫酸とFeの溶出量)が少なくなり,pHの低下が緩和された.黄鉄鉱溶解に対するCMEの抑制作用は,カテコール添加濃度0.01kmol m^<-3>以上,pH4〜7の...
文部科学省, 萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 17656287