Researcher basic information

• 工学博士, 北海道大学

• https://researchmap.jp/yasu-tojo?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201301082093190685
• https://www.eng.hokudai.ac.jp/labo/wdlw3/staff/tojo/tojo.htm

• 201301082093190685

• 減容化熱処理
• 除染廃棄物
• 遮断型
• アルミノ珪酸塩
• セシウム
• 焼却灰
• 最終処分場
• 重金属
• 廃棄物埋立地
• 安定化
• 溶出
• 炉内雰囲気
• シミュレーション
• 建設混合廃棄物
• 篩下残渣
• 水分拡散係数
• 浸出水
• 土壌汚染
• 飽和不飽和浸透流解析
• 不飽和透水係数

• Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Environmental systems for civil engineering
• Environmental Science/Agriculture Science, Environmental materials and recycle technology
• Environmental Science/Agriculture Science, Environmental load reduction and remediation

• Bachelor's degree program, School of Engineering
• Master's degree program, Graduate School of Engineering
• Doctoral (PhD) degree program, Graduate School of Engineering

Research activity information

• Jun. 2021, 土木学会, 土木学会論文賞
  一般廃棄物ガス化溶融および灰溶融施設で生成される溶融メタルの金属資源性評価[土木学会論文集G（環境）Vol.76, No.1, pp.1-8, 2020.]
  山口 直久;松藤 敏彦;東條 安匡;仲嶺 彰人
• Sep. 2020, 環境大臣表彰（令和2年度廃棄物・浄化槽研究開発功労者）
  東條安匡
• Mar. 2020, Journal of Material Cycle and Waste Management, Leading Reviewer Award 2020
  Yasumasa Tojo
• May 2005, 廃棄物学会, 廃棄物学会奨励賞
• Nov. 2001, 土木学会環境工学委員会奨励賞

• Solidification of Cs-bearing melting fly ash by cement and metakaolin-based geopolymers
  Kanako Toda; Lang Lang; Takumi Saito; Kazuto Endo; Kazuo Yamada; Yasumasa Tojo
  Nuclear Engineering and Design, 442, 114253, 114253, Elsevier BV, Oct. 2025, [Peer-reviewed], [Last author]
  English, Scientific journal
• Computational-fluid-dynamics simulation of nitrogen oxide emission in a vertical-type waste incinerator under oxyfuel- and air-combustion conditions
  Ahmed Abd Alraheem Suliman Esaa; In-Hee Hwang; Yuki Ogaya; Takeshi Yamauchi; Yasumasa Tojo
  Waste Management, 203, 114860, 114860, Elsevier BV, Jul. 2025, [Peer-reviewed]
  Scientific journal
• Changes in the coastal environments and their impact on society in the Qaanaaq region, northwestern Greenland
  Shin Sugiyama; Atsushi Yamaguchi; Tatsuya Watanabe; Yasumasa Tojo; Naotaka Hayashi; Jean-Baptiste Thiebot; Makoto Tomiyasu; Kohei Hasegawa; Yoko Mitani; Mayuko Otsuki; Yuta Sakuragi; Monica Ogawa; Kenzo Tanaka; Kaisei Sakurai; Kohei Matsuno; Naoya Kanna; Evgeny Podolskiy; Ryo Kusaka; Yefan Wang; Takuro Imazu; Kaho Watanabe; Ken Sato; Shinta Ukai; Soratakato Yamada; Ken Kondo; Shintaro Yamasaki; Kazutaka Tateyama; Kazutoshi Sato; Jun Inoue; Taro Mori; Tatsuya Fukazawa; Aqqalu Rosing-Asvid; Kirsty Langley; Andrea M.U. Gierisch; Jenna Sutherland; Toku Oshima
  Polar Science, 101206, 101206, Elsevier BV, Apr. 2025, [Peer-reviewed]
  Scientific journal
• Suppression mechanism contributing to the low leaching rate of cesium from incineration bottom ash
  Yasumasa Tojo; Mikako Ishii; Kazuki Tamura; In-Hee Hwang
  Journal of Environmental Radioactivity, 280, 107575, 107575, Elsevier BV, Dec. 2024, [Peer-reviewed], [Lead author, Corresponding author]
  Scientific journal
• 硬化阻害成分であるZnを含有した溶融飛灰のセメント固型化方法の開発
  山田一夫; 市川恒樹; 安河内隆仁; 東條安匡; 遠藤和人
  環境放射能除染学会誌, 12, 3, 71, 78, Oct. 2024, [Peer-reviewed]
• Attempts to Estimate the Amount of Contamination by Cs and Sr in Cracked Concrete Considering Realistic Contamination Conditions
  Yamada K.; Hokora H.; Maruyama I.; Aihara H.; Tomita S.; Tojo Y.; Shibuya K.; Hosokawa Y.; Igarashi G.; Koma K.
  Proceedings of WM2024 Conference, 24110, Feb. 2024, [Peer-reviewed]
• Cs leaching from the cement or geopolymer solidified Cs adsorbed zeolite (natural mordenite)
  Yasukochi Takahito; Tojo Yasumasa; Hwang In-Hee; Matsuo Takayuki; Toda Kanako; Yamada Kazuo; Endo Kazuto
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 35, 483, Japan Society of Material Cycles and Waste Management, 2024
  Japanese, Cs leaching was evaluated by a long-term leaching test on cement-geopolymer (GP) solidified Cs adsorbed zeolite (natural mordenite), a candidate for final disposal of fly ash generated from thermal treatment of decontaminated waste. The leaching tests were conducted in accordance with the ANSI 16.1 method, replacing the solvent in appropriate interval. In addition, changes in Cs leaching behavior due to freezing and thawing of the specimens and immersion in seawater were evaluated, assuming specimen degradation and contact with high-salinity solution, which are expected in an actual disposal environment. As a result, it was clarified that Cs leaching from the cement/GP solidified Cs adsorbed zeolite is determined by diffusion in the solid phase. Freeze-thawing did not affect the Cs leaching rate, but when the specimen was immersed in sea water Cs leaching was accelerated. When the cement solidified body was immersed in seawater, Cs leaching was suppressed by surface precipitates. The cumulative Cs elution rate was below 0.6% even after 100 days of immersion in seawater, and the incremental Cs concentrations in leachant were within the order of concentration standards in environmental water. The results indicate that zeolites can be promising candidate as a final disposal form that retains Cs for a long period of time.
• Comparison of NO_X emission behavior for air- and oxyfuel- combustion of solid waste in a vertical combustor
  HWANG IN-HEE; Ogaya Yuki; Esaa Ahmed; Tojo Yasumasa; Matsuo Takayuki; Masuda Kengo
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 35, 353, Japan Society of Material Cycles and Waste Management, 2024
  Japanese, In the context of global warming, various efforts are being made to reduce GHG emissions in the waste sector. CCUS of CO₂ in exhaust gas can be one of the effective methods. Oxyfuel combustion has attracted attention as a new combustion method, in which a mixture of oxygen and exhaust gas is injected into the furnace for combustion. Various studies of oxyfuel combustion have been conducted in Japan toward the commercialization of oxyfuel combustion power plants, , mainly at thermal power plants and its effect of reducing NO_X emissions has been reported. In the case of waste combustion, fuel NO_X accounts for the majority of the NO_X generated, and the effect of reducing NO_X by oxyfuel combustion is not clear. In this study, we investigated the NO_X generation characteristics of air and oxyfuel combustion of waste through laboratory experiments and simulations using a vertical stoker-type incinerator as a model. As a result, no significant difference was found in the amount of NO_X generated by both air and oxyfuel combustions. One of the reasons is thought to be that the effect of reduction of thermal NO_X by oxyfuel combustion is relatively decreased in the operating temperature range of waste incinerators.
• Characterization of char derived from solid wastes with CO2 as career gas
  Iwasaki Kotaro; Hwang In-hee; Tojo Yasumasa; Matsuo Takayuki
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 35, 371, Japan Society of Material Cycles and Waste Management, 2024
  Japanese, Carbonisation is focused as a carbon recycling and carbon storage technology for waste. The resulting char can be used for a variety of purposes. The ash-rich char also has the effect of making solid carbon more persistent and storing it in the ground. In conventional carbonisation, nitrogen is used as a carrier gas, pyrolysis gas is burnt and the combustion gas is returned to the carbonisation furnace and used as a carrier gas (heat source) for carbonisation. When the carrier gas is carbon dioxide and the combustible gas is burnt with oxygen, the main component of the combustion gas is carbon dioxide, which can be used as a carrier gas for carbonisation and as a CCUS for exhaust gas, even negative emissions of carbon can be expected. In this study, the characteristics of carbides produced with carbon dioxide as a carrier gas were evaluated from the two axes of carbon recycling (fuel and material utilisation) and carbon storage (pre-processing before landfill), comparing them with carbides produced with nitrogen carrier gas. Under the conditions of the present study, the carbides obtained were almost the same as those produced by conventional carbides.
• Effect of high concentration of CO₂ in waste Incineration flue gas on HCl and SOx removal rate
  Shuto Tsubasa; Hwang In-Hee; Tojo Yasumasa; Matsuo Takayuki
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 35, 355, Japan Society of Material Cycles and Waste Management, 2024
  Japanese, Oxyfuel combustion technology, in which pure oxygen is mixed with recirculated exhaust gas and supplied to the furnace instead of combustion air, is attracting attention as part of CCUS technology in response to the global warming issue. Since the main component of the exhaust gas in this combustion method is CO₂, high concentrations of CO₂ can be directly recovered without separating N₂ gas, which is a great advantage for reducing total CO₂ emissions. In this study, acid gas removal experiments using slaked lime were conducted in a lab-scale experiment simulating a dust collector to investigate the effect of applying oxygen combustion to a waste incineration facility on conventional acid gas dry removal. As a result, it was confirmed that the acid gas removal rate decreased due to the reaction between slaked lime and CO₂ under high temperature conditions, suggesting that the simultaneous application of oxygen combustion and high temperature dust collection may reduce the acid gas removal efficiency.
• Evaluation of seismic performance of aged massive RC wall structure restrained by adjacent members using RBSM
  Puttipong Srimook; Kazuo Yamada; Sayuri Tomita; Go Igarashi; Haruka Aihara; Yasumasa Tojo; Ippei Maruyama
  Nuclear Engineering and Design, 414, 112602, 112602, Elsevier BV, Dec. 2023, [Peer-reviewed]
  Scientific journal
• Leaching Characteristics of Cs from the Decomposed Cu Ferrocyanide Adsorbent Solidified by Portland Cement and Geopolymer
  Kazuo Yamada; Tsuneki Ichikawa; Yasumasa Tojo; Kazuto Endo
  RILEM Bookseries, 739, 748, Springer Nature Switzerland, 09 Jun. 2023, [Peer-reviewed]
  In book
• Transitions and Prospects for Solid Waste Management in Local Communities of Greenland
  Yasumasa Tojo; Naotaka Hayashi; Simon Koots
  Material Cycles and Waste Management Research, 34, 1, 32, 41, Japan Society of Waste Management Experts, 31 Jan. 2023, [Invited], [Lead author, Corresponding author]
  Scientific journal
• Characteristics of pyrolysis and combustion characteristics of solid waste under high concentration of CO₂ atmosphere
  Yamauchi Takeshi; HWANG IN-HEE; TOJO YASUMASA; MATSUO TAKAYUKI; MASUDA KENGO
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 34, 359, Japan Society of Material Cycles and Waste Management, 2023
  Japanese, Oxyfuel combustion is one of promising solid waste incineration methods as part of CCUS technology in response to the global warming issue. Since the main component of the exhaust gas is CO₂ by supplying pure oxygen with recirculated exhaust gas to the furnace instead of combustion air, the high concentrations of CO₂ can be directly recovered without separating N₂ gas, which is a great advantage for reducing total CO₂ emissions. In this study, thermogravimetric analysis and kinetics analysis of RDF pyrolysis and char combustion were conducted under CO₂ and N₂ atmosphere to investigate the effect of oxyfuel combustion on waste incineration in a vertical stoker-type furnace. As a result, no significant differences were observed in pyrolysis and combustion behavior depending on two different atmospheric gases. The results of kinetics analysis showed that the kinetics triplets tended to be somewhat larger when CO₂ gas was used for reaction, but the difference was not so great especially for char combustion. It was concluded that the decomposition rate of the sample was dominated by the O₂ gas rather than N₂ or CO₂ gas during combustion.
• Effect of intermittent water vapor addition on the removal efficiency of HCl and SO_X in dry scrubbing of waste incineration flue gas
  MASUDA YUDAI; HWANG IN-HEE; TOJO YASUMASA; MATSUO TAKAYUKI; MINOYA HIROSHI
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 34, 405, Japan Society of Material Cycles and Waste Management, 2023
  Japanese, In this study, the direct addition of water vapor to the waste incineration flue gas was investigated to improve the acid gas removal efficiency of dry scrubbing using slaked lime. Using a laboratory-scale experimental apparatus simulating a bag filter (BF), the effect of water vapor addition conditions on the reaction mechanism of slaked lime and acid gas as well as the acid gas removal rate was evaluated. As a result, the removal efficiency of hydrogen chloride was most improved when the water vapor was added by the 200% of the amount of slaked lime deposited on the BF. However, the improvement of the removal efficiency of sulfur oxides was not observed under the coexistence of hydrogen chloride even in the same condition of water vapor addition. For the application of this method to the actual dry scrubbing system, further investigation should be performed in relation to the operating conditions such as the numbers and intervals of water vapor addition.
• IMPROVEMENT OF INSOLUBILIZATION EFFICIENCY OF CESIUM IN FLY ASH BY ALKALI FELDSPAR USING ROTARY KILN
  TOJO Yasumasa; OKUBO Haruo; HWANG In-Hee; MATSUO Takayuki
  Japanese Journal of JSCE, 79, 25, n/a, Japan Society of Civil Engineers, 2023, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, At present, to reduce the volume of decontamination waste, thermal treatment is carried out. In the thermal treatment, cesium (Cs) is volatilized and separated, resulting in fly ash containing much radioactive Cs. Cs in this fly ash is a chloride and is soluble. For safe final disposal, it is preferable that Cs in fly ash is insoluble. In this study, applying the mechanism that alkali feldspar makes Cs insoluble under heating conditions, whether the efficiency of insolubilization of Cs in fly ash improves was investigated by using rotary kiln. Indian feldspar, fly ash, and cesium chloride were mixed and heated at 700°C in a rotary kiln. No effect of rotating speed on Cs insolubilization was observed. After heating at 4 rpm of rotating speed and 700°C of temperature for 15 hours, 99% of the added cesium became insoluble. Even the addition ratio of Indian feldspar is reduced to about 80% of the amount of fly ash, by heating the mixture for 15 hours, 96% insolubilization of Cs was achieved.
• Various Cs and Sr Penetration Behaviors in Concrete Depending on the Type of Aggregate and the Condition of Concrete
  Kazuo Yamada; Masaya Yokokawa; Yasumasa Tojo; Sayuri Tomita; Kazutoshi Shibuya; Ippei Maruyama
  WM Symposia 2022, Mar. 2022, [Peer-reviewed]
• Prodution of porous sodium carbonate for dry-scrubbing of MSWI flue gas by vacuum thermal treatment of sodium bicarbonate (Part 2)
  HWANG In-Hee; UTSUNO Hisashi; MATSUO Takayuki; TOJO Yasumasa
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 33, 317, Japan Society of Material Cycles and Waste Management, 2022
  Japanese, 重曹を用いた酸性ガスの乾式処理において、高い除去率を得るために行っていた重曹の微粉化の代わりに重曹を粉砕せず真空加熱し多孔質の炭酸ナトリウムをあらかじめ製造し、酸性ガス処理に用いる方法を検討した。その結果、圧力が多孔質炭酸ナトリウムの比表面積に支配的な製造条件であり、低圧のほど重曹の分解で生成したガスが固体表面から放出しやすくなり、より細かい細孔が発達することが確認できた。比表面積4m²/g以上の炭酸ナトリウムであれば、既存の微粉重曹と同等の酸性ガス除去性能が得られること、なおかつ、そのような多孔質炭酸ナトリウムは粗重曹を180℃、50kPaでの真空加熱で製造できることがわかった。
• Clarification of the chemical form of lead in fly ash insolubilized by co-heating with aluminosilicate
  Tsunematsu Miyabi; Tojo Yasumasa; Matsuo Takayuki; Hwang In-Hee
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 33, 407, Japan Society of Material Cycles and Waste Management, 2022
  Japanese, Fly ash generated from municipal solid waste incinerator contains high concentrations of hazardous heavy metals. So it must be treated to inhibit their leaching for final disposal. In previous study, it was confirmed that cesium leaching was significantly suppressed after co-heating with aluminosilicates. Cesium was captured in amorphous phase and insolubilized. When this method was applied to municipal solid waste incineration fly ash, a decrease in lead leaching concentration was also confirmed. However, since lead forms hydroxide precipitates at high pH, it is not clear whether the reduction in leaching concentration is due to trapping by aluminosilicates or precipitation formation. The objective of this study was to clarify the chemical form of lead after co-heating with aluminosilicates. After heating of the mixture of aluminosilicates and fly ash and removing soluble lead, pH-dependence test was performed. As a result, the lead leaching concentration increased with decreasing pH, and there was no difference in the elution concentration with and without co-heating. Thus, decrease of leaching concentration of lead after co-heating with aluminosilicates is not capturing but just formation of hydroxides.
• PRODUCTION OF POROUS SODIUM CARBONATE USING VACUUM THERMAL TREATMENT OF SODIUM BICARBONATE FOR TREATMENT OF MUNICIPAL SOLID WASTE INCINERATION FLUE GAS
  In-Hee HWANG; Hisashi UTSUNO; Yasumasa TOJO; Takayuki MATSUO
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 78, 7, III_459, III_466, Japan Society of Civil Engineers, 2022, [Peer-reviewed]
  Scientific journal
• Dry scrubbing of municipal solid waste incineration flue gas using porous sodium carbonate produced via vacuum thermal treatment of sodium bicarbonate
  In-Hee Hwang; Takayuki Matsuo; Toshihiko Matsuto; Yasumasa Tojo; Ryoji Sameshima
  Journal of Material Cycles and Waste Management, 23, 4, 1609, 1616, Springer Science and Business Media LLC, Jul. 2021, [Peer-reviewed]
  Scientific journal
• Insolubilization of Cesium contained in fly ash by co-heating with potassium feldspar
  Yasumasa Tojo
  Global Environmental Research, 24, 2, 173, 180, Jun. 2021, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
  English, Scientific journal
• Utilization of bottom ash for the removal of acidic gases generated in municipal solid waste incinerator
  Nakamura Tomoya; Hwang In-Hee; Matsuo Takayuki; Tojo Yasumasa; Toshihiko Matsuto; Sameshima Ryoji
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 32, 315, Japan Society of Material Cycles and Waste Management, 2021
  Japanese, ごみ焼却より発生する焼却灰と飛灰成分の約2割はカルシウムである。しかし、飛灰中のCa化合物は酸性ガスとの反応生成物が主成分であることに対し、焼却灰はCaCO₃、CaO、Ca鉱物類が主成分であり、その中でもCaO、CaCO₃は酸性ガス除去に有効な成分である。本研究ではごみ焼却排ガス処理に使用される消石灰の代替として焼却灰を用いる案を検討した。300 µm以下の水冷後の焼却灰（Ca含有量：39～46%）は，170℃にて消石灰の約6～8割に相当するHCl除去性能を示した。焼却灰のうちの有効成分として10～15％であるもののBF吹込み消石灰の一部を代替できる可能性が十分考えられる。一方、焼却灰の炉内噴霧は炉内での直接的なHCl除去には効果がないが、高温下でCa化合物がCaOに分解されることにより、排ガスとともに下流側に流れる際にHCl除去に寄与する可能性が示唆された。
• Study on the capturing mechanism of Cs in fly ash by amorphized potassium feldspar
  Soga Takaaki; Tojo Yasumasa; Matsuo Takayuki; Hwang In-Hee; Matsuto Toshihiko
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 32, 411, Japan Society of Material Cycles and Waste Management, 2021
  Japanese, Potassium feldspar captures Cs by co-heating with cesium-containing fly ash. The optimum temperature is 700 °C. However, it is unclear why Cs is captured at 700 °C. Therefore, in this study, amorphized potassium feldspar and CsCl were co-heated at various temperatures, and the form of each element contained in the residue after heating was analyzed. And the structural change in the heating process was also investigated. As a result, it was clarified that ion exchange occurred among them because almost the same amount of K and Na as Cs, which became poorly soluble, became easily soluble. The exchange reaction proceeded rapidly from around 400 ° C. From the XRD analysis of the heating process, although CsCl disappeared, the formation of KCl could not be confirmed, suggesting that a solid solution of Cs and K was formed. Furthermore, it was considered possible that these existed as amorphous rather than crystalline.
• Study on the method to improve capturing efficiency of cesium in fly ash by co-heating with alkali feldspar
  Okada Saki; Tojo Yasumasa; Matsuo Takayuki; Matsuto Toshihiko; Hwang In-Hee
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 32, 435, Japan Society of Material Cycles and Waste Management, 2021
  Japanese, Since cesium in fly ash generated from thermal treatment for volume reduction process is highly concentrated and easily soluble, it is effective to make cesium insoluble for safe disposal. In previous studies, insolubilization of cesium was achieved by co-heating fly ash containing cesium with alkali feldspar. In this reaction, potassium in feldspar exchanges with cesium in fly ash, and feldspar captures cesium into amorphous phase and makes cesium insoluble. In previous studies, though cesium capturing efficiency was more than 90%, it is desirable to increase the efficiency to nearly 100% because cesium that cannot be captured requires further treatment. In this study, methods to further improve cesium capturing efficiency were examined. It was supposed that cesium was not captured due to insufficient contact between potassium and cesium. Thus, whether the capturing efficiency could be increased by improving the contact condition was examined. As a result, it was found that premixing by planetary mill increased the contact opportunities between potassium and cesium and the capturing efficiency was increased to almost 100%. Furthermore, it was found that the capturing efficiency was improved by repeating heating and cooling.
• Effect of internal conditions in the hazardous waste landfill on the leaching behavior of heavy metals in fly ash
  Takahashi Hisashi; Tojo Yasumasa; Matsuo Takayuki; Hwang In-Hee; Matsuto Toshihiko
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 32, 383, Japan Society of Material Cycles and Waste Management, 2021
  Japanese, Hazardous waste landfill where waste exceeding the leaching criteria is disposed of doesn't allow rainwater or air are entering. As the results, waste may keep its leaching potential similar to that at the time of disposal. In this study, numerical calculations were performed in order to confirm whether or not the leaching suppression of heavy metals, which occurs in non-hazardous waste landfill, occurs, when the internal condition of hazardous waste landfill is intentionally controlled. The model used was a combination of a landfill simulator that mainly calculated degradation process of organic matter and a geochemical model (PHREEQC). MSW fly ash was subjected to the calculation. And although no intrusion of rainwater was set, the initial moisture content was set to be maintained during entire calculation period. In addition, regarding gas composition, CO₂ concentration was changed for 350ppm, 50%, 80%, and 100%. The calculation was performed for 100 years. In case of Pb, the mineral species produced were Pb(OH)₂, PbCO₃, Pb₃(OH)₂(CO₃)₂. And the higher the CO₂ concentration, the faster the time when PbCO₃ becomes the main component. And the liquid phase concentration of Pb was dominated by it.
• Simultaneous effects of airflow and temperature increase on water removal in bio-drying
  Geun-Yong Ham; Dong-Hoon Lee; Toshihiko Matsuto; Yasumasa Tojo; Jae-Ram Park
  Journal of Material Cycles and Waste Management, 22, 4, 1056, 1066, Springer Science and Business Media LLC, Jul. 2020, [Peer-reviewed]
  English, Scientific journal
• THE EFFECT OF INSIDE CIRCUMSTANCE OF THE HAZARDOUS WASTE LANDFILL ON THE LEACHING BEHAVIOR OF HARMFUL HEAVY METALS
  Yasumasa Tojo
  International Journal of GEOMATE, 18, 69, International Journal of Geomate, 01 May 2020, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Effect of phosphate compound on the reduction of the pressure drop of laboratory-scale fabric filter
  Shigetoshi Takahashi; In-Hee Hwang; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto
  Environmental Technology, 1, 8, Informa UK Limited, 23 Apr. 2020, [Peer-reviewed]
  English, Scientific journal
• パレスチナにおける廃棄物処分場環境監査マニュアルの作成
  東條安匡
  廃棄物資源循環学会誌, 31, 2, Mar. 2020, [Invited], [Lead author]
  Japanese, Symposium
• Study on evaluation method of Cs and Sr intrusion into concrete waste generated by demolition of Fukushima nuclear power plant
  Yokokawa Masaya; Yamada Kazuo; Tojo Yasumasa; Matsuto Toshihiko; Matsuo Takayuki; Hwang In-Hee
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 31, 431, Japan Society of Material Cycles and Waste Management, 2020
  Japanese, Demolition work of Fukushima nuclear power plant is going to be commenced. Since the volume of contaminated waste concrete is estimated to be huge, volume reduction of it is required. In order to separate clean concrete from contaminated concrete, it is necessary to know how deep radionuclide invaded into concrete. Considering the dose rate, Cs-137 and Sr-90 deem to be important. However, they have different mobility, it is necessary to separate them. In the previous study, by focusing on the energy difference of beta-ray between them, separation was attempted putting a PET plate shield between the IP and the contaminated concrete sample, but the measurement with sufficient accuracy was not obtained. In this study, to improve the accuracy of separation, separation of Cs and Sr was attempted by using shields with different densities and thicknesses. The shielding ability is determined by the product of the density and the thickness. As a result of measurement for various set of shield and concrete samples which are exposed to Cs-137 and Sr-90, high separation accuracy was obtained when using a shield with high density and thin thickness.
• Study on insolubilization of radioactive Cs in contaminated fly ash using aluminosilicate
  Tsuboi Naruhiro; Tojo Yasumasa; Arai Hiroyuki; Matsuo Takayuki; Matsuto Toshihiko; Hwang In-Hee
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 31, 429, Japan Society of Material Cycles and Waste Management, 2020
  Japanese, It has been confirmed in previous studies that aluminosilicate (alkali feldspar or feldspar synthetic reagent (sol reagent)) captures Cs in fly ash by co-heating and makes Cs insoluble. However, up to now, stable Cs has been used, and it has not been confirmed whether this capturing occurs even actual polluted ash containing radioactive Cs. Therefore, in this study, the co-heating experiment with aluminosilicate was conducted using the actual contaminated fly ash generated in Fukushima prefecture and the simulated contaminated ash added with radioisotope (Cs-137). As a result, the aluminosilicate captured Cs even if it was radioactive Cs, and makes Cs insoluble. It was confirmed that the capturing efficiency is higher as the amount of aluminosilicate is higher, and that if the aluminosilicate of about 3 times the amount of fly ash is added, Cs becomes insoluble state at an efficiency of 98% or more.
• Long-term change of leaching behavior of hexavalent chromium contained in the refractory materials disposed at the hazardous waste landfill and its control measure
  Yokoi Rina; Tojo Yasumasa; Matsuo Takayuki; Matsuto Toshihiko; Hwang In-Hee; Yamada Masato
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 31, 389, Japan Society of Material Cycles and Waste Management, 2020
  Japanese, The hazardous waste landfill site is required to appropriately store the harmful substances contained in the hazardous waste and prevent the discharge of them to the outside, semipermanently. From a long-term perspective, the risk of structural deterioration and disasters can be considered, but in such an event, the release of harmful substances must be avoided. A previous study investigating the waste actually accepted at the hazardous waste landfill site found that refractory bricks used in the melting furnace was major waste accepted. This is because the leaching concentration of hexavalent chromium exceeds the criterion. Therefore, in this study, we conducted a weathering acceleration experiment on refractory bricks from which hexavalent chromium leaches out, and examined the effect of environmental conditions in the hazardous waste landfill site on the dissolution behavior of chromium. As a result, it was confirmed that under humid conditions, the leaching of hexavalent chromium was significantly reduced.
• Improvement of the capturing ratio of Cs in concentrates generated by volume reduction process using aluminosilicate
  Wada Kota; Tojo Yasumasa; Matsuo Takayuki; Matsuto Toshihiko; Hwang In-Hee
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 31, 433, Japan Society of Material Cycles and Waste Management, 2020
  Japanese, The thermal treatment for volume reduction of decontamination waste generated by the Fukushima Daiichi Nuclear Power Plant accident has an issue that it generates fly ash containing easily soluble and high concentration of Cs. Since long-term safe storage of fly ash is required, to change the form of Cs from mobile to immobile is necessary. Co-heating fly ash containing Cs with aluminosilicate achieves insolubilization of Cs. However, the rate of insoluble Cs decreased as the fly ash amount increased. The aim of this study is to maintain the high rate of insoluble Cs even when the amount of fly ash increased. Since it was found that the alkaline element in the fly ash inhibited the capturing of Cs, we thought that by the addition of silicate minerals which don’t contain alkaline element (diatomaceous earth, kaolinite), they may capture the alkaline element. As a result, it was confirmed that these minerals are possible to capture alkali elements and increase the ratio of insoluble Cs. Especially, it was found that by adding kaolinite at a heating temperature of 800°C, the rate of insoluble Cs could be maintained at the highest rate.
• Prodution of porous sodium carbonate for dry-scrubbing of MSWI flue gas by vacuum thermal treatment of sodium bicarbonate
  Hwang In-Hee; Matsuo Takayuki; Tojo Yasumasa; Matsuto Toshihiko; Masuda Kengo
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 31, 271, Japan Society of Material Cycles and Waste Management, 2020
  Japanese, 重曹は，ごみ焼却排ガス中の塩化水素および硫黄酸化物の乾式処理に用いられる代表的なアルカリ剤である。しかし，反応効率を上げる目的で行われている重曹の微粉化は，貯留槽内での架橋発生を抑制するための添加薬剤の使用等によるコスト増加の原因となり，重曹利用の妨げとなっている。本研究では，重曹を微粉化せず，真空加熱処理を行うことであらかじめ多孔質化したソーダ灰を製造し，酸性ガス処理に用いる方法を検討した。その結果，粗重曹を180℃，30 kPaで真空加熱すると，多孔質化が進み，粉砕重曹を180℃で加熱したものより高い比表面積と塩化水素除去性能を持つソーダ灰が得られることがわかった。なおかつ，薬剤の吹込みによるバグフィルタ差圧低減効果も期待される。今回の研究より，微粉化によって生じる問題点を解決しながら，重曹のメリットを活かせる新たな手法を提案することができた。
• Study on low leaching rates of salts from bottom ashes municipal solid waste incinerators
  Kusakabe Hajime; Hwang In-Hee; Matsuo Takayuki; Tojo Yasumasa; Matsuto Toshihiko
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 31, 385, Japan Society of Material Cycles and Waste Management, 2020
  Japanese, 焼却主灰の分析を行った先行研究において，可溶性金属と考えられているNa, Cl, K等の溶出率が非常に低いことがわかった。その原因の一つとして主灰の水冷後の炭酸化が挙げられ，生成したカルサイト（CaCO₃）が主灰粒子を被覆し，塩類や重金属類の不溶化を引き起こしていると考えられた。仮説を検証するために，本研究では，告示13号溶出試験に加え，pH依存性試験，900℃加熱後の溶出試験を行い，溶出率の変化を調べた。しかし，Ca，ICの溶出率はpH依存性を示したことに対し，Na, K, Clの溶出率はpHに依存せずほぼ一定でお互いに溶出挙動が異なっており，炭酸化が直接的な原因とは言えない結果となった。一方，主灰の900℃加熱前後の溶出試験結果を比較すると，Na, K, Clにおいて加熱灰の溶出濃度が加熱前の約10%まで低下するなど，焼却過程における主灰の溶融度合が塩類の溶出に大きく影響していると推察された。
• EVALUATION OF METAL RESOURCE POTENTIAL OF MOLTEN METAL PRODUCED IN MUNICIPAL SOLID WASTE GASIFICATION MELTING FURNACES AND ASH MELTING FURNACES
  Naohisa YAMAGUCHI; Toshihiko MATSUTO; Yasumasa TOJO; Akihito NAKAMINE
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 76, 1, 1, 8, Japan Society of Civil Engineers, 2020, [Peer-reviewed]
  Japanese, Scientific journal
• Material and moisture balance in a full-scale bio-drying MBT system for solid recovered fuel production
  Geun-Yong Ham; Toshihiko Matsuto; Yasumasa Tojo; Takayuki Matsuo
  Journal of Material Cycles and Waste Management, 22, 1, 167, 175, Springer Science and Business Media LLC, Jan. 2020, [Peer-reviewed]
  English, Scientific journal
• Generation and reduction of hydrogen chloride gas in vertical type incinerator
  Hwang In-Hee; Futagami Yuto; Matsuo Takayuki; Matsuto Toshihiko; Tojo Yasumasa; Yamada Yuji
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 30, 337, Japan Society of Material Cycles and Waste Management, 2019
  Japanese, 竪型ストーカ炉は，一定高さで堆積させたごみを炉下から低空気比の一次燃焼空気を供給することで熱分解し，発生した熱分解ガスを二次燃焼空気より効率よく燃焼するものである。消石灰による処理前から排ガス中塩化水素濃度が低く，炉内のごみ層の中でアルカリ金属より捕捉された可能性が考えられた。しかし，竪型ストーカ炉の主灰への塩素移行量を調査した結果，30%程度であり，従来ストーカ炉との差は認められなかった。一方，竪型ストーカ炉の排ガス中塩化水素濃度の測定結果から，塩化水素の捕捉は主に焼却炉と再燃焼室，さらには減温塔の間で起こっていると示唆された。そこには，ばいじん中の酸化カルシウムと塩化水素の反応が関与している可能性が考えられた。本現象が竪型ストーカ炉特有のものであるかは今後の課題である。従来ストーカ炉においても同様の調査を行い，炉内での塩化水素低減メカニズムを明らかにする必要がある。
• Evaluation methodology on flowability of on-site produced slaked lime
  Gonda Kyohei; Hwan In-Hee; Matsuto Toshihiko; Matsuo Takayuki; Tojo Yasumasa; Kinoshita Ryo
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 30, 335, Japan Society of Material Cycles and Waste Management, 2019
  Japanese, Slaked lime is commonly used as alkali agent for dry scrubbing of hydrogen chloride and sulfur oxides in flue gas discharged from municipal solid waste incinerators (MSWIs). As the utilization amount of slake lime is the most among chemicals used in MSWI, its impact on the operating cost is significant. For this reason, the on-site production of slaked lime was attempted by using cheap quicklime and a simplified hydrator in MSWI. However, the discharge problem of fly ash occurred at the hopper of bag filter (BF) owing to the poor flow property of on-site produced slaked lime when it was tested in the demonstration facility. In this study, we developed lab-scale of flowability tests to evaluate the flow property of produced slaked lime as well as to find the optimum condition of on-site production.
• Factors affecting on leaching of lead from municipal solid waste incinerator residues
  soga takaaki; Hwang In-Hee; Matsuto Toshihiko; Matsuo Takayuki; Tojo Yasumasa
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 30, 453, Japan Society of Material Cycles and Waste Management, 2019
  Japanese, 焼却により発生した飛灰と主灰のうち，飛灰は特別管理一般廃棄物に該当するため，キレート処理などにより重金属に対して不溶化処理を行うことが義務付けられている。一方，主灰についても鉛の有害性判定基準である溶出濃度0.3mg/Lを超えるものがある。本研究では主灰を対象とし，灰の組成から，鉛溶出量への影響因子と鉛溶出量の関係を明らかにすることを目的とした。
  
  鉛含有量は試料間に大きな差はなかったが，溶出濃度にばらつきが見られた。鉛は両性金属であるため，高pH域で溶出濃度が高く,pHと酸化カルシウム量との間に正の相関が見られた。主灰の水冷時に酸化カルシウムは水和反応により水酸化カルシウムとなり，ピット保管時に大気中の二酸化炭素によって炭酸化が起こる。この炭酸化によりpHが減少するため,ピット保管時の炭酸化の進行度により,鉛の溶出濃度に差が生じると考えられる。
• Estimation of material flow in combined type anaerobic digestion facility
  Tsuboi Naruhiro; Matsuto Toshihiko; Matsuo Takayuki; Canabal Eliza; Tojo Yasumasa; Hwang In-Hee
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 29, 277, Japan Society of Material Cycles and Waste Management, 2018
  Japanese, 現在日本では低炭素社会の実現に向けてバイオマスの利用を行う自治体が増えている。生ごみのメタン発酵もその一つだが、生ごみの分別には収集コストや住民負担の増加などのデメリットもある。一方で混合収集したごみを機械選別によってメタン発酵ごみ（生ごみ、紙）と焼却ごみ（布、プラスチック等）に分けて処理するコンバインドシステムが注目されてきている。本研究では実際の施設を対象としてサンプリング、分析を行い物質収支を調べた。分析項目は含水率、ごみ組成、可燃分、TOC、酸素消費量、BMP（メタン発生ポテンシャル）である。組成ごとに可燃分，炭素量，生物分解性炭素量を求め，水分，組成の選別率のほかに，生物分解性炭素の移行率を推定した。
• Influencing factor on acid gas removal and flow characteristics of slaked lime in onsite production process
  Hwang In-Hee; Sakai Yutaro; Matsuo Takayuki; Tojo Yasumasa; Matsuto Toshihiko
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 29, 351, Japan Society of Material Cycles and Waste Management, 2018
  Japanese, 最近，焼却施設オンサイトで安価な生石灰から消石灰を製造し，塩化水素と硫黄酸化物の乾式処理に用いることで排ガス処理コストを削減しようとする試みがある。本研究はその基礎研究として生石灰とラボスケールの消化装置を用い，滞留時間，水添加率，撹拌速度，薬剤添加の製造条件が消石灰の物性に及ぼす影響を調べてこれらの物性と酸性ガス除去性能およびハンドリング性との関係を明らかにした。本装置では滞留時間46分以上で98%の高い消化率が得られた。水添加率= 2.5で製造した消石灰は相対的にハンドリング性の指標が悪くなっていたが，薬剤添加により多少の改善効果が得られた。酸性ガス除去性能は水添加率＝2.5，撹拌速度20rpmの条件で最も高かったが，薬剤添加によるさらなる性能向上は見られなかった。
• An on-site survey on household-scale anaerobic digestion in Sri Lanka
  Kotte Hewa; Praween Madusanka; Toshihiko Matsuto; Yasumasa Tojo
  Journal of Material Cycles and Waste Management, 2018, [Peer-reviewed], [Last author]
  English, Scientific journal
• Study on the Drying Process of the Solid Waste in Landfill under Arid Climate
  Kanta Okamoto; Yasumasa Tojo; Takayuki Matsuo
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 74, 7, 305, 316, 2018, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Questionnaire and onsite survey on municipal solid waste composting in Sri Lanka
  Kotte Hewa Praween Madusanka; Toshihiko Matsuto; Yasumasa Tojo; In-Hee Hwang
  JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 19, 2, 804, 814, Apr. 2017, [Peer-reviewed]
  English, Scientific journal
• Removal and speciation of mercury compounds in flue gas from a waste incinerator
  In-Hee Hwang; Hiroshi Minoya; Takayuki Matsuo; Toshihiko Matsuto; Yasumasa Tojo
  ENVIRONMENTAL TECHNOLOGY, 37, 21, 2723, 2730, Nov. 2016, [Peer-reviewed], [Last author]
  English, Scientific journal
• Municipal solid waste management in Tehran: Changes during the last 5 years
  Tahereh Malmir; Yasumasa Tojo
  WASTE MANAGEMENT & RESEARCH, 34, 5, 449, 456, May 2016, [Peer-reviewed]
  English, Scientific journal
• Influence of weathering of bottom ash on the leaching behavior of cesium
  Y. TOJO; S. IWAMOTO; M. ISHII; T. MATSUTO; AND; T. MATSUO
  International Journal of GEOMATE, 12, 32, 43, 49, 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Requirements for Safe and Secure Landfills
  東條安匡
  廃棄物資源循環学会誌, Vol. 27, No. 1, 10, 17, 廃棄物資源循環学会, 2016, [Invited], [Lead author, Corresponding author]
  Japanese, Research society
• 中間処理残渣主体埋立地に対応した安定化促進技術の開発
  東條安匡
  生活と環境, Vol.60, No.12, 64, 69, 日本環境衛生センター, 01 Dec. 2015, [Invited], [Lead author, Corresponding author]
  Japanese, Research society
• Effectiveness of the vertical gas ventilation pipes installed after the landfill closure for promoting waste stabilization in post-closure phase
  Yasumasa Tojo; Natsuki Kishizawa; Toshihiko Matsuto; Takayuki Matsuo
  Jurnal Rekayasa Kimia dan Lingkungan, 10, 3, 116, 258, 2015, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
  Scientific journal
• Prediction of Long-term Leachate Generation in a Municipal Solid Waste Landfill in an Arid Climate
  Tahereh MALMIR; Hiroshi NOMURA; Yasumasa TOJO
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 71, 7, 247, 258, 2015, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Early Stabilization Method for Landfill Site : How Waste Properties and Intermediate Cover Soil Influence Landfill Leachate
  小野雄策; 遠藤和人; 東條安匡; 山田正人
  廃棄物資源循環学会誌, Vol.26, No.1, 22, 34, 廃棄物資源循環学会, 2015, [Invited]
  Japanese, Research society
• Identification of the Existing Form of Cesium in Bottom Ash and Fly Ash in Municipal Solid Wastes
  Yuka Watanabe; Amirhomayoun Saffarzadeh; Yasumasa Tojo; Takayuki Shimaoka
  Spring-8/SACLA Research Report, 2, 1, 89, 93, 2014, [Peer-reviewed]
  Japanese, Scientific journal
• EFFECT OF pH AND TEMPERATURE ON LEACHING OF CESIUM FROM MUNICIPAL SOLID WASTE BOTTOM ASH
  Yutaka DOTE; Tomoo SEKITO; Ryo MOROOKA; Takayuki SHIMAOKA; Yasumasa TOJO; Hideki YOSHIDA; Takashi KAWANO
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 70, 7, 217, 223, Japan Society of Civil Engineers, 2014, [Peer-reviewed]
  Japanese, Scientific journal, In order to clarify the leachability of cesium from bottom ash of municipal solid waste, sequential extraction, pH dependence test, and temperature dependence test were conducted. Bottom ash was obtained by incinerating RDF or wood chips to which stable cesium solution was added. It was found that the cesium fraction distribution pattern of bottom ash from wood chips except water soluble fraction was similar to that of actual bottom ash. Less than a pH of 5, cesium leaching ratio was largely increased with decrease in pH. Over a pH of 5, cesium leaching ratio was almost same as that at natural pH. Increase of cesium leaching ratio at 60°C was 1.2 times higher than that at 20°C in average. Therefore, the effect of pH and temperature on cesium leaching would be negligible in actual landfill conditions. Cesium in residual state would be present with aluminum and iron that were insoluble in reduction condition.
• Strategy for separation and treatment of disaster waste: a manual for earthquake and tsunami disaster waste management in Japan
  Misuzu Asari; Shin-ichi Sakai; Toshiaki Yoshioka; Yasumasa Tojo; Tomohiro Tasaki; Hidetaka Takigami; Kohei Watanabe
  JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 15, 3, 290, 299, Sep. 2013, [Peer-reviewed]
  English, Scientific journal
• Study on the influence of solidification of MSWI bottom ash on the emission of easily mobile elements
  Yasumasa Tojo; Mikako Ishii; Toshihiko Matsuto; Takayuki Matsuo
  2nd International Conference on Final Sinks, 16 May 2013, [Lead author]
  English, International conference proceedings
• Influence of weathering of bottom ash on the leaching behavior of cesium
  Tojo Yasumasa; Iwamoto Saori; Matsuo Takayuki; Matsuto Toshihiko; Hwang In-Hee; Shimaoka Takayuki
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 24, 563, Japan Society of Material Cycles and Waste Management, 2013
  Phase transformation and leaching of cesium from incineration bottom ash were investigated by conducting accelerating weathering experiment. Four kinds of weathering condition were set; namely, blank (under nitrogen gas condition), wetting and drying, freezing and thawing, and exposure to carbon dioxide gas. Leaching of cesium under blank condition didn't change. On the other hand, drastic decrease of leaching of cesium was identified under carbon dioxide exposure. From XRD analysis, formation of calcite was identified. It deemed that newly formed calcite inhibited the leaching of Cs by covering reactive surface of bottom ash. In both wetting-drying and freezing-thawing condition, leaching of Cs increased initially. But it decreased after several weeks then it became lower than blank finally. This decrease of leaching also seems to be caused by formation of calcite.
• Dechlorination of organochlorine compound in flue gas from municipal solid waste incinerator using metal compound added activated clay
  Hwang In-Hee; Kanamori Atsushi; Takahashi Shigetoshi; Matsuo Takayuki; Matsuto Toshihiko; Tojo Yasumasa
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 24, 421, Japan Society of Material Cycles and Waste Management, 2013
  本研究では、活性炭の代わりに300℃の高温条件でDXNを直接分解できる、安価で安全な無機性材料として活性白土に検討を行った。活性白土中に含まれている金属成分をさらに添加することで、300℃でのMCBの脱塩素化への影響を調べた。添加した金属化合物のうち、Fe₂O₃、Cuの添加によりMCB分解量が増加することがわかった。また、金属化合物の添加量とMCB分解量が比例していることから、活性白土内に含まれているこれらの成分がMCBの脱塩素化に寄与している可能性が示唆された。
• Study on the existence form and leaching behavior of cesium contained in incineration bottom ash
  Kinoshita Ryo; Tojo yasumasa; Matsuo takayuki; Hwang In-Hee; Matsuto Toshihiko; Shimaoka Takayuki
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 24, 575, Japan Society of Material Cycles and Waste Management, 2013
  The aim of this study is clarifying the leaching behavior of hardly-soluble cesium contained in bottom ash and the factor affecting its leaching behavior. For this purpose, pH dependence test, determination of the Cs content by different particle size and pH dependence test of different particle size fraction were conducted. incineration bottom ashes that was artificially created to contain cesium in high content was used. In pH dependence test, solvents were prepared by using nitric acid to be target pH from 1.9 to 10.8. As the results, leaching amount of hardly-soluble cesium increased together with silicon and aluminum along with decrease of pH. Hardly-soluble cesium combining with aluminosilicate or existing in glassy amorphous phase was deemed to be leached out by the exposure to strong acid. However, the low pH performed in the test never occur in real incineration ashes because pH of ashes is generally high and pH of ash that passed for a long period of time is reported to be almost 8.5. Leaching ratio of cesium is only 2 to 3% at such pH. Content of Cs in each particle size was not different and difference of leaching behavior were not observed either.
• Influence of bottom ash solidification on leaching behavior of heavy metals
  野村 弘; 東條 安匡; 松尾 孝之; 黄 仁姫; 松藤 敏彦
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 24, 617, Japan Society of Material Cycles and Waste Management, 2013
  "Solidified condition" and "Un-solidified condition" were made by using same bottom ash and their leaching characteristics of heavy metals were examined by column leaching test. It was confirmed that although ash that contains CaO or Ca(OH)₂ tends to solidify, repetition of wetting and drying made the ash not solidify. Two kinds of ash were made to solidified and un-solidified state respectively. And they were subjected to the column leaching test in which the ashes were exposed to atmosphere or CO₂. Cumulative leaching amount of Ca under CO₂ condition increased because CaCO₃ was thought to be dissolved by pH drop. This indicated that severe exposure to CO₂ tends to increase leaching amount of metals. Regarding Pb, cumulative leaching amount increased in solidified condition although it was restrained in un-solidified condition. These results are thought to be caused by inhibition of carbonation due to decrease of permeability and hydraulic conductivity. Cumulative emission of heavy metals from bottom ash that tends to solidify increases since high pH value is maintained. But bottom ash subjected to the repeating procedure of wetting and drying becomes not to solidify and leaching of heavy metals from it significantly decreased.
• 震災廃棄物処理特集(1)岩手県における災害廃棄物処理―処理計画を中心に―
  佐々木秀幸; 颯田尚哉; 東條安匡; 鈴木拓也
  廃棄物資源循環学会誌, 23, 1, 40, 46, 廃棄物資源循環学会, 31 Jan. 2012, [Invited]
  Japanese, Research society
• Distribution characteristics of polycyclic aromatic hydrocarbons when solid waste coexists with the dissolved organic carbon
  Masahiro SATO; Yasumasa TOJO; Takayuki MATSUO; Toshihiko MATSUTO
  Environmental Engineering Research, JSCE, 48, III.553-III.563, 25 Nov. 2011, [Peer-reviewed]
  Japanese, Scientific journal
• An investigation of carbon release rate via leachate from an industrial solid waste landfill
  Hee Jong Kim; Toshihiko Matsuto; Yasumasa Tojo
  WASTE MANAGEMENT & RESEARCH, 29, 6, 612, 621, Jun. 2011, [Peer-reviewed]
  English, Scientific journal
• Fractionation of organic matter contributing H2S formation from the fine residue of mixed C&D waste sorting process
  TOJO YASUMASA; SAITO RYUSEI; MATSUO TAKAYUKI; Hwang In-Hee; MATSUTO TOSHIHIKO
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 22, 92, 92, Japan Society of Material Cycles and Waste Management, 2011
  Japanese, To evaluate the potential of hydrogen sulfide formation of fine residue generated from sorting facility treating mixed construction and demolition waste, it is necessary to elucidate biodegradability of organic matter contained in the residue. In this study, organic matter contained in the residue was fractionated from the viewpoint of physical composition and fiber components. And availability of organic carbon by microorganisms were tested by biological methane formation test. As consequence, organic carbon in the residue was derived from wood(29%) and paper(68%) with regard to physical composition. And also it was derived from lignin (32%) and cellulose (37%). Organic carbon utilized by microorganisms in BMP test was only 1% of TOC in the residue and it corresponded to carbon easily leached out.
• Recovery of liquid fertilizer from scallop entrails by subcritical hydrothermal treatment
  Hwang In-Hee; Abe Natsuki; Matsuto Toshihiko; Tojo Yasumasa; Matuo Takayuki
  Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 22, 124, 124, Japan Society of Material Cycles and Waste Management, 2011
  Japanese, 本研究では、臨界点（374℃、22.1MPa）以下の亜臨界水を用い、ホタテ内蔵から液肥を回収することを目的とした。そのため、水熱処理の温度・圧力、滞留時間、固液比などの条件を変化させ、ホタテ内臓中の肥料成分を液中に効果的に抽出しながら、カドミウム等の重金属の溶出を残渣に抑える最適条件を調べた。その結果、肥料成分が最も多く液中に抽出され、阻害成分の抽出が抑えられる亜臨界水熱条件として200℃（圧力1.35MPa）、滞留時間20分、固液比＝10が求められた。この条件で得られた液体生成物の組成を市販の液肥成分と肥料取締法に定められている重金属の最大含有許容量に比較した結果、窒素とカリウムの肥料成分濃度は、市販の液肥と同程度あるいはそれ以上含まれており、阻害成分であるカドミウム、クロム、鉛、ニッケルなど重金属においては含有許容最大量を大きく下回ることから、液肥として品質と安全性が確認できた。
• Monitoring of leachate quality stored in gas ventilation pipes for evaluating the degree of landfill stabilization
  Yasumasa Tojo; Masahiro Sato; Takayuki Matsuo; Toshihiko Matsuto
  WASTE MANAGEMENT & RESEARCH, 29, 1, 41, 49, Jan. 2011, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Investigation of Polycyclic Aromatic Hydrocarbons (PAHs) Content in Bottom Ashes from some Japanese Waste Incinerators and Simple Estimation of their Fate in Landfill
  Masahiro Sato; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  Sustainable Environment Research, 21, 4, 219, 227, 2011, [Peer-reviewed]
  Scientific journal
• Air and landfill gas movement through passive gas vents installed in closed landfills
  Hee-Jong Kim; Hideki Yoshida; Toshihiko Matsuto; Yasumasa Tojo; Takayuki Matsuo
  WASTE MANAGEMENT, 30, 3, 465, 472, Mar. 2010, [Peer-reviewed]
  English, Scientific journal
• Gypsum and organic matter distribution in a mixed construction and demolition waste sorting process and their possible removal from outputs
  A. Montero; Y. Tojo; T. Matsuo; T. Matsuto; M. Yamada; H. Asakura; Y. Ono
  JOURNAL OF HAZARDOUS MATERIALS, 175, 1-3, 747, 753, Mar. 2010, [Peer-reviewed]
  English, Scientific journal
• Fate of Elements at Quasi-stabilization and the Need for Elucidation on Substance Behavior for Complete Landfill Stabilization
  TOJO Yasumasa
  Material cycles and waste management research, 20, 6, 278, 282, 廃棄物資源循環学会, 30 Nov. 2009, [Invited], [Lead author, Corresponding author]
  Japanese, Research society, Elements in waste that are disposed of are eventually transferred to either of three destinations : into the atmosphere by landfill gas, into the surface water by leachate, or into a solid waste body within a landfill. Past studies indicate that the ratio of elements that remain in a landfill is rather high even twenty years after disposal. And they also found that these elements diminish from the landfill very slowly even when several centuries are taken into consideration. This implies that many elements remain even after intense reaction phases cease and emission drops to a level where no treatment is required. It must be important to guarantee that these residual elements never cause a negative impact, over long-range period of time. Most of the numerical models for simulating substance behavior in landfills have, up to now, mainly dealt with the degradation process and generation of landfill gas. For long-term prediction, especially with regard to hazardous elements, the model which can deal with the formation of the high molecular organic compounds such as humic substances needs to be developed.
• Gypsum distribution in a mixed construction and demolition waste sorting process and its composition in residue
  A. Montero; Y. Tojo; T. Matsuo; T. Matsuto; M. Yamada; H. Asakura; Y. Ono
  Proceedings of Twelfth International Waste Management and Landfill Symposium, SARDINIA 2009, 09 Oct. 2009
  English, International conference proceedings
• Study on Spontaneous Combustion of Wastes Caused by Moisture Adsorption during Storage
  KAKUTA Yoshitada; MACHIDA Takao; MATSUTO Toshihiko; TOJO Yasumasa; MATSUO Takayuki
  Journal of the Japan Society of Material Cycles and Waste Management, 20, 1, 39, 51, 一般社団法人 廃棄物資源循環学会, 29 Jan. 2009, [Peer-reviewed]
  Japanese, Scientific journal, Heat generation caused by moisture adsorption was investigated experimentally and the possibility of spontaneous combustion was evaluated through numerical simulation of the storage of large quantities of waste fuels such as wood chips and RDF. The equilibrium moisture content of each waste sample, as the main parameter for the numerical simulation, was measured in this experiment. We confirmed that the change in pyrolysis residue was different from that occurring in other samples. When the model of adsorption rate was examined in the moisture adsorption experiment, the model in which the r...
• External Factors Affecting Leaching Characteristics of Heavy Metals from Recycled Material Produced for Construction Use
  Yasumasa Tojo; Shinya Mizubayashi; Takayuki Matsuo; Hirofumi Sakanakura; Masahiro Osako; Toshihiko Matsuto
  Proceedings of APLAS Sapporo 2008, The 5th Asian-Pacific Landfill Symposium, 22 Oct. 2008, [Lead author]
  English, International conference proceedings
• Characterization of Melting Fly Ash from MSW by X-ray Photoelectron Spectroscopy
  Hiroyuki Inano; Kohji Itabashi; Takashi Okada; Yasumasa Tojo
  Proceedings of APLAS Sapporo 2008, The 5th Asian-Pacific Landfill Symposium, 22 Oct. 2008, [Last author]
  English, International conference proceedings
• Material Flow Analysis of Mixed C&D Waste Treatment Facility for Indentifying the Factor Affecting Residue Quality
  Jose Alfaro Montero; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto; Masato Yamada; Yusaku Ono
  Proceedings of APLAS Sapporo 2008, The 5th Asian-Pacific Landfill Symposium, 22 Oct. 2008
• Investigation of Material Separation of Mixed Construction and Demolition Waste by Sorting Process
  Alonso Montero; Yasumasa TOJO; Takayuki MATSUO; Toshihiko MATSUTO; Masato YAMADA; Hiroshi ASAKURA; Yusaku ONO
  Environmental Engineering Research, JSCE, 45, 271, 278, Japan Society of Civil Engineers, 2008, [Peer-reviewed]
  English, Scientific journal, The final disposal ratio of mixed construction and demolition waste (MCDW) remains high in Japan, while progress has been made in the recycling of other construction and demolition waste. Sorting facilities are expected to play an important role in better management of MCDW. In this study, the feasibility of sorting facilities for the separation of material and of pretreatment for fmal disposal was investigated by conducting a batch experiment at a real operational facility. The material flow of each output fraction was determined based on the mass distribution and on analysis of the ignition loss and metal content. The separation of organic matter and ferrous metal achieved by the sorting process was excellent; almost 70% was separated out for recycling and did not go for disposal. Although the distribution ratios of heavy metals, such as Pb and Zn, sent to landfill were still high, their content little changed from the condition of the original mixed waste. The process of sorting MCDW achieved reduction of mass for disposal, reduction of the organic load directed to the landfill, and the diversion of iron from MCDW to recycling.
• Compartment model of aerobic and anaerobic biodegradation in a municipal solid waste landfill
  Sang-Yul Kim; Yasumasa Tojo; Toshihiko Matsuto
  WASTE MANAGEMENT & RESEARCH, 25, 6, 524, 537, Dec. 2007, [Peer-reviewed]
  English, Scientific journal
• Removal of Chlorine from Melting Fly Ash by Solvent Washing Methods
  OKADA Takashi; MATSUTO Toshihiko; TOJO Yasumasa
  Journal of the Japan Society of Waste Management Experts, 18, 6, 357, 366, 一般社団法人 廃棄物資源循環学会, 30 Nov. 2007, [Peer-reviewed]
  Japanese, Scientific journal, Fly ash generated from MSW ash-melting and gasification-melting plants, known as Melting Furnace Fly Ash (MFA), is a valuable resource due to the high content of Lead and Zinc in MFA. This study aimed to find the optimal solvent washing method to remove chlorine, the major contaminant for the refinery process. Four kinds of solvent were used in this study : distilled water, sodium carbonate (Na2CO3), sodium sulfate (Na2SO4), and distilled water with CO2 bubbling. After solvent concentration, gas flow rate, number of washings, temperature and washing time were determined, twenty-three MFA fr...
• Characterization of residual carbon influencing on de novo synthesis of PCDD/Fs in MSWI fly ash
  Y. Kakuta; T. Matsuto; Y. Tojo; H. Tomikawa
  CHEMOSPHERE, 68, 5, 880, 886, Jun. 2007, [Peer-reviewed]
  English, Scientific journal
• Characterization of Shredder Residues Derived from End-of-Life Vehicles and Home Electrical Appliances
  MATSUTO Toshihiko; NAKAJIMA Shohei; TOJO Yasumasa; KAKUTA Yoshitada; MATSUO Takayuki
  Journal of the Japan Society of Waste Management Experts, 18, 2, 126, 136, 一般社団法人 廃棄物資源循環学会, 31 Mar. 2007, [Peer-reviewed]
  Japanese, Scientific journal, Shredder residues derived from ELV (End of Life Vehicles), home electrical appliances, automatic vending machines, and other products were characterized in terms of composition, heating value, and other parameters. Samples were collected from several shredding facilities that use different processes.Physical compositions are different for each kind of shredded product. While hard plastics account for 70 percent of the residue in electrical appliances, various types of combustible components are included in the residue of ELV. Material recycling, therefore, is difficult when mixed products a...
• Selection of Cost-effective Zn and Pb Recovery Method from Melting Fly Ash Based on Ca and Si Contents
  OKADA Takashi; MATSUTO Toshihiko; TOJO Yasumasa
  Journal of the Japan Society of Waste Management Experts, 18, 1, 8, 19, 一般社団法人 廃棄物資源循環学会, 31 Jan. 2007, [Peer-reviewed]
  Japanese, Scientific journal, Fly ash generated from MSW ash-melting and gasification-melting plants, known as Melting Furnace Fly Ash (MFA), is a valuable resource due to its high content of Pb (Lead) and Zn (Zinc) in MFA. In order to recover metals from MFA, pre-treatment for metal enrichment and removal of unwanted elements is necessary. Meanwhile, the elemental composition of MFA depends on the variation of furnace type, input waste, the injection of calcium hydroxide for gas treatment, etc. This study aims to find the most cost-effective recovery method according to the elemental composition of MFA, based on a meta...
• DEVELOPMENT OF AN INTEGRATED RISK ASSESSMENT MODEL FOR SOLID WASTE LANDFILL
  HANADA Shigehisa; MATSUTO Toshihiko; TOJO Yasumasa
  Doboku Gakkai Ronbunshuu G, 62, 4, 377, 390, 20 Jan. 2007, [Peer-reviewed]
  Japanese, Scientific journal
• A study on hierarchical framing and standardization of leaching tests for waste utilization in Japan
  H. Sakanakura; M. Osako; K. Miyawaki; S. Sakita; Y. Tojo; H. Sakamoto; K. Endo; T. Tanosaki; A. Kida; S. Sakai
  SARDINIA 2007 11th International Waste Management and Landfill Symposium, 2007
  English, International conference proceedings
• Assessment of biodegradability of waste in old landfill
  Yasumasa Tojo; Suthatip Pueboobpaphan; Toshihiko Matsuo; Takayuki Matsuto; Yoshitada Kakuta
  SARDINIA 2007 11th International Waste Management and Landfill Symposium, 2007, [Lead author]
  English, International conference proceedings
• Recovery of zinc and lead from fly ash from ash-melting and gasification-melting processes of MSW - Comparison and applicability of chemical leaching methods
  T. Okada; Y. Tojo; N. Tanaka; T. Matsuto
  WASTE MANAGEMENT, 27, 1, 69, 80, 2007, [Peer-reviewed]
  English, Scientific journal
• Oxygen intrusion into waste in old landfills of low organic content
  A Kallel; N Tanaka; Y Tojo; T Matsuto; S Hanada
  WASTE MANAGEMENT & RESEARCH, 24, 3, 242, 249, Jun. 2006, [Peer-reviewed]
  English, Scientific journal
• MODELING OF LEAKAGE THROUGH LANDFILL BOTTOM LINER AND OVERFLOW FROM WASTE STORAGE DAM UNDER VARIOUS OPTIONS FOR DESIGN, CONSTRUCTION AND MAINTENANCE
  HANADA Shigehisa; TOJO Yasumasa; MATSUTO Toshihiko
  Journal of Japan Society of Civil Engineers G, 62, 1, 171, 182, Japan Society of Civil Engineers, 20 Apr. 2006, [Peer-reviewed]
  Japanese, Scientific journal, Leakage of leachate through landfill bottom liner and overflow of leachate from waste storage dam were modeled under various options for design, construction and maintenance. The model includes lateral flow on an intermediate cover, a bypass flow through vertical pipes (ex. gas venting pipes), and leachate accumulation in a landfill caused by clogging of leachate collection pipes and inadequate capacity of leachate storage pond. By using this model, the amounts of leakage through three types of bottom liners were calculated and compared. Moreover, the mounts of leakage and overflow were calculated under various options for design, construction, maintenance and waste characteristics. The calculation results showed that the hydraulic conductivity of sand drainage layer, the number of geomembrane sheet defects, the diameter of a sheet defect and the hydraulic conductivity of clay used in the single composite liner incresed leakage rate severely. This shows that for the reduction of leakage rate through the bottom liner, the selection of material for sand drainage layer, quality assurance of sheet, technical skill of operators and the installation of clay liner are very important. In addition, the calculation results showed that the functional failure of gas collection pipe could cause overflow of leachate from waste storage dam, particularly when the soil with low permeability was used as the cover material.
• Requisite condition of F/M ratio and volumetric load for avoiding VFA accumulation on dry thermophilic anaerobic digestion
  Yasumasa Tojo; Toshihiko Matsuto; Yoshitada Kakuta; Takayuki Matsuto
  VENICE 2006 Biomass and Waste to Energy Symposium, 2006
  English, International conference proceedings
• Past, present, and future of MSW landfills in Japan
  Nobutoshi Tanaka; Yasumasa Tojo; Toshihiko Matsuto
  Journal of Material Cycles and Waste Management, 7, 2, 104, 111, Aug. 2005, [Peer-reviewed]
  English, International conference proceedings
• Leaching behaviour of elements and evaluation of pre-treatment methods for municipal solid waste incinerator residues in column leaching tests
  SY Kim; N Tanaka; T Matsuto; Y Tojo
  WASTE MANAGEMENT & RESEARCH, 23, 3, 220, 229, Jun. 2005, [Peer-reviewed]
  English, Scientific journal
• Survey on Current State of Landfilled Waste, especially on Incombustible Waste
  TOJO Yasumasa; TANAKA Nobutoshi; MATSUTO Toshihiko; KAKUTA Yoshitada; MATSUO Takayuki
  Journal of the Japan Society of Waste Management Experts, 16, 2, 130, 140, 廃棄物学会, 31 Mar. 2005, [Peer-reviewed]
  Japanese, Scientific journal
• NUMERICAL MODELING OF LONG-TERM BEHAVIOR OF WASTE IN LANDFILL
  Yasumasa Tojo; Nobutoshi Tanaka; Toshihiko Matsuto; Masahiro Osako
  The International Conference on Environmental Science and Technology, 2005
  English, International conference proceedings
• Optimum washing condition for condensing heavy metals in melting furnace fly ash
  Yasumasa Tojo; Takashi Okada; Nobutoshi Tanaka; Toshihiko Matsuto; Yoshitada Kakuta; Takayuki Matsuo
  SARDINIA 2005 Tenth International Waste Management and Landfill Symposium, 2005
  International conference proceedings
• Risk assessments of MSW landfill under various options for design operation and maintenance
  Shigehisa Hanada; Yasumasa Tojo; Toshihiko Matsuto; Nobutoshi Tanaka
  SARDINIA 2005 Tenth International Waste Management and Landfill Symposium, 2005
  International conference proceedings
• Influence of clogging on transmissivity of geosynthetic drainage material adopted for landfill leachate collection system
  Yasumasa Tojo; Nobutoshi Tanaka; Toshihiko Matsuto; Takayuki Matsuo
  Environmental engineering research, JSCE, 42, 219, 230, Japan Society of Civil Engineers, 2005, [Peer-reviewed], [Lead author]
  Japanese, Scientific journal, Drainage of leachate is important in order to prevent leachate storage, which causes leakage risk, and to avoid the circumstance of the landfill bottom turning to the anaerobic condition. However, care must be needed when designing and constructing drainage system at landfill, because drainage material inevitably contacts biologically and chemically active leachate, which triggers clogging of drainage material. Especially in Japan, recent leachate contains salts at relatively high concentration. Such leachate quality accelerates formation of calcium carbonate. In this study, the influence of clogging on the transmissivity of geosynthetics drainage material was investigated by conducting various flow experiments. As consequences, the following results were obtained:(1) All geosynthetic material tested in this study indicated high trapping efficiency of suspended solid. And it resulted in decrease of hydraulic conductivity of them.(2) Raw leachate causes the decrease of hydraulic conductivity more severely than the physical clogging effect. And degree of the transmissivity loss was much when leachate of high pH or leachate from incineration ash was used.(3) Results of numerical simulation showed that some geosynthetic materials lose transmissivity completely within a year if it was adopted for leachate drainage system.
• Dry Separation of actual shredded bulky wastes by fluidized bed technology
  Y.Kakuta; T.Matsuto; Y.Tojo; T.Matsuo
  Selected Papers presented at the Third International Symposium on Feedstock Recycling of Plastic, 449, 455, 2005
• Carbonization of Household Waste for Recycling and Thermal Pre-treatment for Landfill Disposal
  MATSUTO Toshihiko; TANAKA Nobutoshi; KAKUTA Yoshitada; TOJO Yasumasa; MATSUO Takayuki
  Journal of the Japan Society of Waste Management Experts, 15, 5, 408, 417, 一般社団法人 廃棄物資源循環学会, 30 Sep. 2004, [Peer-reviewed]
  Japanese, Scientific journal, Residential waste was carbonized as a means of fuel production, metal recovery, and pretreatment for landfill. Tested materials were combustible waste, incombustible waste and bulky waste, which were collected from a residential area and a shredding facility.<BR>Char product from bulky waste showed good quality for fuel due to high wood content and potential recovery of metal such as Cu. The quality of char from the other two types of waste was low, but the leaching of heavy metal was minimized and organic contents were reduced, showing its effectiveness as a pretreatment for landfill dispo...
• 溶融処理から発生する飛灰の金属濃縮について
  東條安匡
  財団だより，廃棄物研究財団, No.59, 22, 26, 2004, [Invited], [Lead author]
  Japanese, Research society
• UNSATURATED HYDRAULIC CHARACTERISTIC OF VARIOUS RESIDUES FROM INTERMEDIATE WASTE TREATMENT PROCESS
  TOJO Yasumasa; TANAKA Nobutoshi; MATSUTO Toshihiko; MATSUO Takayuki
  Doboku Gakkai Ronbunshu, 727, 727, 113, 118, 土木学会, 22 Feb. 2003, [Peer-reviewed], [Lead author]
  Japanese, Scientific journal
• ANEXPERIMENTAL STUDY OF UNSATURATED WATER MOVEMENT IN INCINERATION RESIDUE LAYER
  TOJO Yasumasa; TANAKA Nobutoshi; MATSUTO Toshihiko; MATSUO Takayuki
  Doboku Gakkai Ronbunshu, 720, 720, 77, 88, 土木学会, 22 Nov. 2002, [Peer-reviewed], [Lead author]
  Japanese, Scientific journal
• Lab Scale Experiment for Control of Incineration Residue Dispersion in MSW Landfill
  MATSUTO Toshihiko; TOJO Yasumasa; MATSUO Takayuki; TANAKA Nobutoshi
  Journal of the Japan Society of Waste Management Experts, 13, 4, 175, 183, 一般社団法人 廃棄物資源循環学会, 31 Jul. 2002, [Peer-reviewed]
  Japanese, Scientific journal, Since most dioxins produced by the incineration process are deposited in incineration residues, MSW landfill can be a possible dioxin source to the environment through the dispersion of residues. In this study, the possibility of residue dispersion was studied by using a lab-scale wind chamber. An operational target to prevent dispersion was then proposed.<BR>Incineration ashes from four different MSW incinerators were used in the experiment. To simulate dumping residues in a landfill, ash was charged from the top upstream of the chamber. Only fine particles of less than 250 micro-meters ar...
• Active control of leachate movement using landfill structure -numerical study-
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO; Takayuki MATSUO
  Proceedings of APLAS, 301, 308, 2002, [Lead author]
  English, International conference proceedings
• Control of water movement by using lateral flow at waste and cover boundary
  Yasumasa Tojo; Nobutoshi Tanaka; Toshihiko Matsuto; Takayuki Matsuo
  Environmental engineering research, JSCE, 39, 413, 422, 2002, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• AN APPLICATION OF CAPILLARY BARRIER AS A LEACHATE DRAINAGE SYSTEM AT BOTTOM OF LANDFILL - EXPERIMENTAL STUDY -
  TOJO Yasumasa; TANAKA Nobutoshi; MATSUTO Toshihiko; MATSUO Takayuki
  Doboku Gakkai Ronbunshu, VII-21, 692, 53, 62, 土木学会, 22 Nov. 2001, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, Experiments had been conducted for investigating an applicability of capillary barrier as a leachate drainage system installing at bottom of landfill. Various characteristics, which include type of material, gradient, rainfall intensity, downdip structure, and length of slope, were changed in the experiments and their influences on drainage efficiency were evaluated. As a result, following consequences were obtained. Using high gradient, low rainfall intensity, uniform sand, dragging down upper layer at downdip, and short slope length increases the drainage capacity of capillary barrier. The drainage efficiency depends upon total quantity of water, which multiplied rainfall intensity by slope length. Therefore intensity of leachate reaching at the bottom of landfill should be restrained in practical use.
• An Application of Capillary barrier as a leachate drainage system at bottom of landfill -Numerical Analysis-
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO
  Journal of Japan Society of Civil Engineers, VII-21, 692, 41, 52, Japan Society of Civil Engineers, 22 Nov. 2001, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, Experimental results presented in previous report was almost reproduced by numerical model, which is employing film flow expression for water movement in gravel layer. The result of real scale numerical experiments carried out by the model showed leachate can be drained completely by capillary barrier if the intensity of leachate reached at the bottom of landfill was below 0.4mm/h. Several effective parameters were altered for examining the drainage capacity. As results, 1) the effectiveness of downdip structure dragging down upper layer can not improve after it exceeds certain depth. 2) more uniform sand can increase drainage capacity. 3) barrier can drain leachate completely as far as infiltrated water is small enough against the amount of water which can decrease potential of upper layer to boundary potential.
• Investigation of surface runoff and its removal on landfill cover
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO; Takayuki MATSUO
  Environmental engineering research, JSCE, 37, 423, 433, 2000, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Metal Concentrations in the Soil Surrounding MSW Landfill Sites
  TOJO Yasumasa; MATSUTO Toshihiko; MATSUO Takayuki; SAKANAKURA Hirofumi; TANAKA Nobutoshi
  Journal of the Japan Society of Waste Management Experts, 10, 6, 311, 320, 一般社団法人 廃棄物資源循環学会, 30 Nov. 1999, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, Heavy metal concentrations in the soil surrounding two MSW landfill sites were investigated. At Site-A, the proportion of incineration ash disposed of is high, whereas it is low at Site-B. Incineration ash contains various kinds of metallic elements. Calcium, Zinc, Copper, and Sodium are especially highly concentrated in the ash compared with noncontaminated soil. An 0.1 N hydrochloric acid extraction procedure was adopted to extract those metallic elements from the soil samples, and the extracted solutions were analyzed by atomic absorption spectrometry. As a result, high concentrations we...
• In situ intake rate measurement for determining hydraulic conductivity of solid waste layers
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之
  Environmental engineering research, JSCE, 35, 11, 19, Japan Society of Civil Engineers, 1997, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, To determine hydraulic property of solid waste materials, in situ intake rate measurements were conducted at surface of landfill. As object layers, incineration residue layers, refuse Layers, and incombustible waste layers were selected to measure. Intake rate of incineration residue decrease suddenly after infiltration started, and then rapidly reach to constant rate, so called final intake rate, within 300 to 500 sec. Refuse layer also indicates similar intake rate transition. To confirm the relationship between final intake rate and saturated hydraulic conductivity, constant head hydraulic conductivity test was carried out for the same samples brought back to laboratory in undisturbed condition. Since good agreements are identified between them, hydraulic conductivity was estimated from the rate. Determined hydraulic conductivity is 10^-4 to 10^-1cmis for incineration residue layer, 10^-2cm/s for refuse layer, and 10⁰cm/s for incombustible waste layer. For trying to investigate the influence of matric suction to the rate curve, unsaturated water movement was simulated based on Green and Ampt theory. In respect with the curve obtained from incineration residue layer, water movement may be dominated by not suction but gravity, due to the analyses which exhibit calculated curve agree well when less suction was assumed.
• Air Flow Rate in Leachate Collection Pipe of Semi-Aerobic Landfills ; The Case of a Single Pipe
  KIM Youngkyu; MATSUTO Toshihiko; TOJO Yasumasa; TANAKA Nobutoshi
  Journal of the Japan Society of Waste Management Experts, 6, 4, 129, 138, 一般社団法人 廃棄物資源循環学会, 31 Jul. 1995, [Peer-reviewed]
  Japanese, Scientific journal, In a semi-aerobic landfill where the inlet and outlet of a leachate collection pipe are opened to the atmosphere, when there are any driving forces, atmospheric air flows easily into the pipe. Therefore it will be expected that oxygen can penetrate from the pipe to interior of landfill due to difference of oxygen concentration.<BR>The purpose of this study is to present calculation equations of air flow velocity in a single pipe, and to determine the pipe line design factors which are concerned with air flow in the pipe.<BR>Main results are as follows :<BR>1) Air velocity in a single pipe c...
• The behavior of pure TRICHLOROETYLENE liquid in water unsaturated / saturated porous media -A experimental study-
  Kazuei ISHII; Nobutoshi TANAKA; Toshihiko MATSUTO; Yasumasa Tojo
  Environmental engineering research, JSCE, 32, 387, 396, 1995, [Peer-reviewed]
  Japanese, Scientific journal

• 飛灰循環によるごみ焼却排ガス処理の高効率化のための飛灰前処理方法の検討
  依田賢; HWANG In-Hee; 東條安匡; 松尾孝之, 環境工学研究フォーラム講演集(CD-ROM), 61st, 2024
• CFD simulation of NOx emission in vertical type waste incinerator under the condition of CO₂/O₂ combustion and N₂/O₂ combustion
  ESAA Ahmed; HWANG In-Hee; TOJO Yasumasa; MATSUO Takayuki; MATSUDA Kengo, 廃棄物資源循環学会研究発表会講演集(Web), 35th, 2024
• Insolubilization of lead in MSW fly ash by co-heating with aluminosilicate
  GUAN Zihao; TOJO Yasumasa; HWANG In-Hee, 廃棄物資源循環学会研究発表会講演集(Web), 31st, 2020
• Study on the drying process of the waste in the landfill under arid climate
  Momose Hirotaka; Tojo Yasumasa; Matsuo Takayuki; Matsuto Toshihiko, Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 28, 453, 453, 2017
  Drying process of waste in landfill located in arid region was investigated from column experiment and numerical calculation. The concrete objective is to confirm whether the drying progresses to the inside of the landfill layer under the conditions in which evaporation is dominant. Drying experiments were conducted using four types of simulated waste. In the sand used as a control, drying in the deeper region did not proceed. This is because drying of the surface causes a drastic decrease in unsaturated hydraulic conductivity which makes liquid water transfer difficult. It is also caused by the condition in which internal evaporation hardly occurs. On the other hand, in case of waste which has larger voids inside, since internal evaporation occurred due to the heat transferred to the deep part, drying progressed. Excluding liquid water movement, coupled model considering only internal evaporation could reproduce experimental results roughly. This result suggests that stabilization is restrained by drying in landfill in arid region., Japan Society of Material Cycles and Waste Management, Japanese
• Immobilization and insolubilization of cesium contained in waste by coincineration with alumino-silicates
  Sakamotto Sakura; Tojo Yasumasa; Matsuo Takayuki; Matsuto Toshihiko, Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 28, 463, 463, 2017
  Previous studies had revealed that the mineral which captures Cs as hardly-soluble form in the incineration bottom ash is the microcline or albite. In this study, the possibility whether this alkali feldspar can capture Cs as hardly soluble form when it coexists in the thermal treatment process of combustible decontamination waste was investigated. Three kinds of feldspars of ceramic raw materials and two types of reagent sets synthesizing feldspar were added to artificially created decontamination waste and incineration tests were carried out. As a result, the proportion of the hardly soluble Cs in the incineration residue increased. In particular, in the series using reagents synthesizing feldspar, the capturing rate of Cs to the bottom ash and the proportion of the hardly soluble Cs increased. This implies that these materials can be utilized to capture Cs into bottom ash as a hardly soluble form. Furthermore, in order to investigate the capturing of Cs in the fly ash, CsCl was added to these materials and the heating test was carried out. As a result, it was found that Cs can be captured as the hardly soluble form at a high rate in the series using reagent synthesizing feldspar., Japan Society of Material Cycles and Waste Management, Japanese
• Reaction mechanism of gaseous hydrogen chloride and calcium hydroxide in dry scrubbing of incineration flue gas
  Hwang In-Hee; Sudo Wataru; Matsuo Takayuki; Tojo Yasumasa; Matsuto Toshihiko, Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 28, 331, 331, 2017
  ごみ焼却排ガス中の塩化水素は粉末の消石灰を煙道に吹き込む乾式法により処理されることが多い。本研究ではBF内のろ布堆積層を模擬したラボスケール実験より消石灰と塩化水素の反応機構を明らかにすることを目的とした。実験結果から消石灰と塩化水素の主な反応生成物はCaClOHであり，消石灰より過剰量の塩化水素が供給される条件でもCaCl₂生成しないことがわかった。系内に未反応の消石灰が存在すると，先に塩化水素と反応してしまい，CaClOHと塩化水素の反応によるCaCl₂の生成まで進まなかった。また，BF温度条件(約170℃)でCaCl₂と消石灰はお互いに短時間で反応しCaClOHを生成することがわかった。消石灰の効率的利用を考えると，CaCl₂まで反応を進行させることが望ましいが，現在の乾式処理条件ではCaClOH生成に留まっている可能性が高いと判断した。  , Japan Society of Material Cycles and Waste Management, Japanese
• 特集 震災廃棄物処理特集（Ⅰ）
  平山修久; 河田惠昭; 奥村与志弘; 浅利美鈴; 吉岡敏明; 酒井伸一; 岡山朋子; 神本裕樹; 遠藤守也; 佐々木秀幸; 颯田尚哉; 東條安匡; 鈴木拓也; 寺園淳; 遠藤和人山本貴士; 小口正弘; 大迫政浩; 滝上英孝; 東博紀; 遠藤和人; 水谷千亜紀, 廃棄物資源循環学会誌, 23, 1, 3, 71, Apr. 2012
  廃棄物資源循環学会, Japanese, Introduction other
• Gypsum distribution in mixed C&D waste sorting process and its state of existence in residue
  Montero Alonso; Tojo Yasumasa; Matsuo Takayuki, Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 19, 31, 33, 19 Nov. 2008
  廃棄物学会, English
• 再生製品からの重金属溶出に環境因子が与える影響の把握
  水林 晋哉; 東條 安匡; 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 18, 987, 989, 19 Nov. 2007
  廃棄物学会, Japanese
• ガス抜き管内貯留水の水質による安定化モニタリングの可能性
  佐藤 昌宏; 東條 安匡; 松尾 孝之, 廃棄物学会研究発表会講演論文集, 18, 769, 771, 19 Nov. 2007
  廃棄物学会, Japanese
• 埋立後長期間を経過した廃棄物の生物分解性を把握する手法に関する基礎的研究
  東條 安匡; Pueboobpaphan Suthatip; 松尾 孝之, 廃棄物学会研究発表会講演論文集, 18, 872, 874, 19 Nov. 2007
  廃棄物学会, Japanese
• 埋立廃棄物の品質並びに埋立構造改善による高規格最終処分システムに関する研究
  井上雄三; 朝倉宏; 山田正人; 遠藤和人; 大迫政浩; 石垣智基; 松藤敏彦; 東條安匡; 島岡隆行; 小野雄策; 渡辺洋一; 川嵜幹生, 環境保全研究成果集(CD-ROM), 2007, 2007
• 建設資材として利用される再生製品の溶出挙動予測モデルの作成
  東條 安匡; 松藤 敏彦; 大迫 政浩, 廃棄物学会研究発表会講演論文集, 17, 1125, 1127, 20 Nov. 2006
  廃棄物学会, Japanese
• 産業廃棄物適正処理のための物質収支モデルの作成
  浜田 雄平; 東條 安匡; 松尾 孝之, 廃棄物学会研究発表会講演論文集, 17, 50, 52, 20 Nov. 2006
  廃棄物学会, Japanese
• 金属回収のための溶融炉運転条件による重金属揮発挙動に関する研究
  冨川 博貴; 岡田 敬志; 東條 安匡, 廃棄物学会研究発表会講演論文集, 17, 613, 615, 20 Nov. 2006
  廃棄物学会, Japanese
• 溶融飛灰中の塩素除去法に関する研究
  岡田 敬志; 牧志 諒; 東條 安匡, 廃棄物学会研究発表会講演論文集, 17, 619, 621, 20 Nov. 2006
  廃棄物学会, Japanese
• 埋立地由来の健康リスク評価モデルの作成
  花田 茂久; 松藤 敏彦; 東條 安匡, 廃棄物学会研究発表会講演論文集, 17, 324, 326, 20 Nov. 2006
  廃棄物学会, Japanese
• 埋立廃棄物の品質並びに埋立構造改善による高規格最終処分システムに関する研究
  井上雄三; 朝倉宏; 山田正人; 遠藤和人; 大迫政浩; 石垣智基; 松藤敏彦; 東條安匡; 島岡隆行; 小野雄策; 渡辺洋一; 川嵜幹生, 環境保全研究成果集(CD-ROM), 2006, 2006
• 溶融飛灰中重金属の連続抽出による形態分析に関する研究
  岡田 敬志; 鈴木 賢; 東條 安匡; 松藤 敏彦, 衛生工学シンポジウム論文集, 13, 111, 114, 16 Nov. 2005
  北海道大学衛生工学会, Japanese
• 安全安心な廃棄物処理を目指して : 田中信壽先生が残した足跡
  松藤 敏彦; 角田 芳忠; 東條 安匡; 土手 裕; 吉田 英樹; 宮脇 健太郎; 肴倉 宏史, 衛生工学シンポジウム論文集, 13, 1, 17, 16 Nov. 2005
  北海道大学衛生工学会, Japanese
• 埋立地からの浸出水漏水・溢流量推定モデルの作成
  花田 茂久; 東條 安匡; 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 962, 964, 31 Oct. 2005
  廃棄物学会, Japanese
• 産業廃棄物の埋立物に関する特性の調査と分類法の検討
  東條 安匡; 牧志 諒; 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 965, 967, 31 Oct. 2005
  廃棄物学会, Japanese
• 溶融飛灰中重金属の連続抽出による形態分析に関する研究
  鈴木 賢; 岡田 敬志; 東條 安匡, 廃棄物学会研究発表会講演論文集, 16, 875, 877, 31 Oct. 2005
  廃棄物学会, Japanese
• 産業廃棄物埋立処分場搬入物の調査と埋立負荷の将来予測に関する研究
  筑紫 康男; 東條 安匡; 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 1063, 1065, 31 Oct. 2005
  廃棄物学会, Japanese
• 平成16年度廃棄物学会奨励賞 廃棄物層内における水分移動現象とその制御法に関する研究 (廃棄物学会賞受賞者記念講演(奨励賞))
  東條 安匡; 松藤 敏彦; 松尾 孝之, 廃棄物学会研究発表会講演論文集, 16, 5, 7, 31 Oct. 2005
  廃棄物学会, Japanese
• 溶融飛灰からの金属回収に関する研究--溶融飛灰性状と水洗処理による山元還元の可能性
  岡田 敬志; 東條 安匡; 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 610, 612, 31 Oct. 2005
  廃棄物学会, Japanese
• 埋立廃棄物の品質並びに埋立構造改善による高規格最終処分システムに関する研究
  井上雄三; 朝倉宏; 山田正人; 遠藤和人; 大迫政浩; 石垣智基; 松藤敏彦; 東條安匡; 島岡隆行; 小野雄策; 渡辺洋一; 川嵜幹生, 環境保全研究成果集(CD-ROM), 2005, 2005
• 埋立地を発生源とする健康リスク評価モデルの作成
  泉和足; 花田茂久; 松藤敏彦; 東条安匡; 松尾孝之; 角田芳忠, 廃棄物学会研究発表会講演論文集, 16th, Pt.1, 2005
• 一般廃棄物最終処分場における搬入物の有機物・金属負荷の実態調査
  東條 安匡; 濱田 雄平; 田中 信壽, 廃棄物学会研究発表会講演論文集, 15, 1215, 1217, 17 Nov. 2004
  廃棄物学会, Japanese
• 厨芥単独処理の高温・高固形物濃度メタン発酵の運転条件に関する検討
  石原 和真; 東條 安匡; 田中 信壽, 廃棄物学会研究発表会講演論文集, 15, 471, 473, 17 Nov. 2004
  廃棄物学会, Japanese
• 溶融飛灰からの金属回収に関する研究--化学的金属回収法の評価・比較
  岡田 敬志; 東條 安匡; 田中 信壽, 廃棄物学会研究発表会講演論文集, 15, 745, 747, 17 Nov. 2004
  廃棄物学会, Japanese
• 廃棄物埋立地内の超長期的物質挙動予測モデルの開発
  東條 安匡; 田中 信壽; 大迫 政浩, 廃棄物学会研究発表会講演論文集, 14, 1064, 1066, 22 Oct. 2003
  廃棄物学会, Japanese
• 都市ごみ溶融飛灰の水洗処理による金属濃縮に関する研究 (第14回廃棄物学会研究発表会)
  津山 陽祐; 東條 安匡; 田中 信壽, 廃棄物学会研究発表会講演論文集, 14, 506, 508, 22 Oct. 2003
  廃棄物学会, Japanese
• 埋立地浸出水水平排水材(ジオシンセティックス)の通水性能に関する研究 (第13回廃棄物学会研究発表会 講演論文集2) -- (埋立地しゃ水)
  廣川 有司; 田中 信壽; 東條 安匡, 廃棄物学会研究発表会講演論文集, 13, 933, 935, 28 Nov. 2002
  廃棄物学会, Japanese
• 埋立地内水分移動シミュレーションによる埋立構造と底部負荷水圧の関係
  東條 安匡; 田中 信壽; 松藤 敏彦; 松尾 孝之, 衛生工学シンポジウム論文集, 8, 57, 62, 01 Nov. 2000
  北海道大学衛生工学会, Japanese
• キャピラリーバリアを利用した廃棄物処分場排水システムの開発
  東條 安匡; 松藤 敏彦; 田中 信壽; 松尾 孝之; 相楽 光宏, 衛生工学シンポジウム論文集, 7, 59, 63, 01 Nov. 1999
  北海道大学衛生工学会, Japanese
• ごみ埋立地表面流の生成機構とその排除に関する研究
  毛利 慎也; 東條 安匡; 田中 信壽, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 10, 2, 1042, 1044, 10 Oct. 1999
  廃棄物学会, Japanese
• 各種廃棄物充填層の水分特性値の把握
  寺澤 孝; 東條 安匡; 田中 信壽; 松藤 敏彦; 松尾 孝之, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 10, 2, 1051, 1053, 10 Oct. 1999
  廃棄物学会, Japanese
• 多層型底部集排水構造の排水効果に与える影響因子に関する実験的研究
  東條 安匡; 田中 信寿; 松藤 敏彦; 松尾 孝之; 菅原 淳, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 9, 2, 878, 880, 10 Oct. 1998
  Japanese
• 焼却灰充填層の2次元不飽和水分移動とそのモデル化
  東條 安匡; 松籐 俊彦; 田中 信寿; 松尾 孝之; 森田 祥子, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 8, 2, 735, 737, 10 Oct. 1997
  Japanese
• キャピラリーバリアを利用した廃棄物処分場底部浸出水集排水構造に関する基礎的研究
  河野 孝; 田中 信寿; 東條 安匡, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 8, 2, 837, 839, 10 Oct. 1997
  Japanese
• 都市ごみ破砕選別工場と破砕不燃残渣の組成に関する調査
  関戸 知雄; 田中 信壽; 松藤 敏彦; 東條 安匡; 松尾 孝之, 衛生工学シンポジウム論文集, 4, 253, 257, 01 Nov. 1996
  北海道大学衛生工学会, Japanese
• 北海道大学工学部における物質収支とごみ収集作業の現状
  田中 信寿; 松藤 敏彦; 東條 安匡; 松尾 孝之; 松岡 秀明, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 7, 1, 168, 170, 01 Sep. 1996
  Japanese
• 都市ごみ破砕選別工場の破砕不燃残渣の性状と変動特性に関する研究
  関戸 知雄; 田中 信壽; 松藤 敏彦; 東條 安匡; 松尾 孝之, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 7, 1, 401, 403, 01 Sep. 1996
  Japanese
• 北海道大学工学部におけるごみ発生・資源化の把握および意識調査
  田中 信寿; 松藤 敏彦; 東條 安匡; 松尾 孝之; 藤田 洋司, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 6, 1, 99, 101, 01 Oct. 1995
  Japanese

• 北極域の研究 : その現状と将来構想
  北極環境研究コンソーシアム長期構想編集委員会; 北極環境研究コンソーシアム, 2-1-3 北極域の廃棄物
  海文堂出版, Mar. 2024, 9784303562304, x, 468p, Japanese, [Joint work]
• 災害廃棄物分別・処理実務マニュアル : 東日本大震災を踏まえて
  廃棄物資源循環学会, （3-13, 3-15, 3-17, 3-19担当）
  ぎょうせい, May 2012, 9784324094310, iii, 176p, 図版 [8] p, Japanese
• 健康と環境の工学
  北海道大学工学部衛生環境工学コース; 北海道大学
  技報堂出版, Mar. 2008, 9784765534277, 243p, Japanese
• 環境工学公式・モデル・数値集
  土木学会環境工学委員会環境工学に関わる出版準備小委員会; 土木学会環境工学委員会; 土木学会, 2.4.4(a)，pp.215-217
  土木学会,丸善 (発売), Jun. 2004, 4810604217, 5, 727p, Japanese
• ごみの百科事典
  小島, 紀徳; 阿久津, 好明; 島田, 荘平; 田村, 昌三; 似田貝, 香門; 寄本, 勝美
  丸善, Sep. 2003, 9784621072851, xiv, 720p, Japanese
• 廃棄物工学の基礎知識 : リサイクル・適正処分のための
  田中 信壽; 松藤 敏彦; 角田 芳忠; 東條 安匡, 第8章：粗大ごみの循環・適正処分と破砕選別技術,pp.141-155，第10章：有害廃棄物の管理と適正処分,pp.179-197
  技報堂出版, 2003, 9784765531894, Japanese
• 廃棄物処理総論―廃棄物工学の原理と廃棄物処理の問題
  ジョージ・チョバノグロース; ヒラリー・タイセン; Vigil, S. A.; 田中, 勝
  エヌ・ティー・エス, Jun. 1998, 4900830259, 862, Japanese

• 金属資源の山元還元を目指した溶融飛灰中重金属類の高濃度化
  福田基紀; 東條安匡; 黄仁姫; 松尾孝之; 寶正史樹; 柴田徹; 肴倉宏史
  第36回廃棄物資源循環学会研究発表会講演論文集
  17 Sep. 2025 - 19 Sep. 2025
• 廃棄物系バイオマスの亜臨界水熱炭化によるカーボンリサイクルおよび貯留特性の評価
  吉岡優; 黄仁姫; Thennakoon Wickramasinghe; Piyumi Ayesha Hansani; 東條安匡; 松尾孝之
  第36回廃棄物資源循環学会研究発表会講演論文集
  17 Sep. 2025 - 19 Sep. 2025
• セメント硬化阻害成分を含む飛灰のアルミナセメントを用いたセメント固型化手法
  安河内隆仁; 山田一夫; 東條安匡; 櫻井哲; 當間久夫; 小田俊司; 遠藤和人
  第36回廃棄物資源循環学会研究発表会講演論文集
  17 Sep. 2025 - 19 Sep. 2025
• フェロシアン化銅焼成物から作成したジオポリマー固型化体の崩壊要因の解明
  草野健太郎; 東條安匡; 黄仁姫; 松尾孝之
  第36回廃棄物資源循環学会研究発表会講演論文集
  17 Sep. 2025 - 19 Sep. 2025
• セメント固型化処理による放射能汚染溶融⾶灰中の放射性Cs溶出率増加
  山田一夫; 安河内隆仁; 佐藤愛子; 櫻井 哲; 當間久夫; 小田俊司; 東條安匡; 遠藤和人
  第14回環境放射能除染研究発表会
  27 Aug. 2025 - 28 Aug. 2025
• アルミナセメントを用いた汚染溶融飛灰セメント固型化体からのセシウム溶出特性
  安河内隆仁; 山田一夫; 櫻井 哲; 當間久夫; 小田俊司; 東條安匡; 遠藤和人
  第14回環境放射能除染研究発表会
  27 Aug. 2025 - 28 Aug. 2025
• 多様な自然環境下の埋立処分場の改善や今後の建設に向けた助言
  東條安匡
  A webinar on "Sustainable Waste Management", A Technical Cooperation between Iran and Japan, 28 Apr. 2021, Nominated symposium
  [Invited]
• 循環型社会実現のための廃棄物処理およびリサイクル技術
  東條安匡
  Cеминар "Японский опыт работы с твердыми бытовыми отходами: переработка. использование", 16 Mar. 2021, Public discourse
  16 Mar. 2021 - 17 Mar. 2021, [Invited]
• Environmental Auditing of the Solid Waste Sanitary Landfills in Palestine
  Yousrea Ramadan; Yasumasa Tojo
  4th International E-Conference on Advances in Engineering, Technology and Management - ICETM 2021, 24 Jan. 2021, English, Oral presentation
• 災害廃棄物処理-近年では必須となったこと-
  東條安匡
  大規模災害時廃棄物対策北海道ブロック協議会 災害廃棄物処理に係るワークショップ, 11 Nov. 2020, Public discourse
  [Invited]
• Insolubilization of lead in MSW fly ash by co-heating with aluminosilicate
  Zihao GUAN; Yasumasa TOJO; In-Hee HWANG
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
  16 Sep. 2020 - 18 Sep. 2020
• 除染廃棄物の熱処理によって生ずる濃縮物中のCsのアルミノ珪酸塩による捕捉率向上
  和田航汰; 東條安匡; 松尾孝之; 松藤敏彦; 黄仁姫
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
  16 Sep. 2020 - 18 Sep. 2020
• 福島第一原子力発電所の廃炉により生ずるコンクリート廃棄物中のCs,Srの侵入状況評価手法の検討
  横川将也; 山田一夫; 東條安匡; 松藤敏彦; 松尾孝之; 黄仁姫
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
  16 Sep. 2020 - 18 Sep. 2020
• アルミノケイ酸塩を用いた汚染飛灰中放射性Csの難溶性態化に関する研究
  坪井成浩; 東條安匡; 新井裕之; 松尾孝之; 松藤敏彦; 黄仁姫
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Oral presentation
  16 Sep. 2020 - 18 Sep. 2020
• 遮断型処分場に処分される耐火材からの六価クロムの長期溶出特性とその抑制対策
  横井理南; 東條安匡; 松尾孝之; 松藤敏彦; 黄仁姫
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
  16 Sep. 2020 - 18 Sep. 2020
• 焼却主灰中塩類の低溶出率に関する研究
  日下部一; 黄仁姫; 松尾孝之; 東條安匡; 松藤敏彦
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese
  16 Sep. 2020 - 18 Sep. 2020
• 重曹の真空加熱による酸性ガス処理用の高性能多孔質薬剤の製造
  黄仁姫; 松尾孝之; 東條安匡; 松藤敏彦; 増田倹吾
  第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Oral presentation
  16 Sep. 2020 - 18 Sep. 2020
• Insolubilization of Cesium contained in fly ash by aluminosilicate
  Yasumasa Tojo; Yurika Itoga; Toshihiko Matsuto
  Sardinia 2019 - 17th International Waste Management and Landfill Symposium, 02 Oct. 2019, English, Oral presentation
  30 Sep. 2019 - 04 Oct. 2019
• 一般廃棄物焼却施設焼却灰からの鉛溶出量の影響要因に関する研究
  曽我孝彰; 黄仁姫; 松藤敏彦; 松尾孝之; 東條安匡
  第30回廃棄物資源循環学会, 19 Sep. 2020, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• Material and moisture balance in a full-scale bio-drying MBT system
  Geun-Yong Ham; Toshihiko Matsuto; Yasumasa Tojo; Takayuki Matsuo
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, English, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• 遮断型処分場内部の環境条件が有害重金属の溶出挙動に与える影響
  池田泰良; 東條安匡; 松尾孝之; 松藤敏彦; 山田正人
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Poster presentation
  19 Sep. 2019 - 21 Sep. 2019
• アルミノケイ酸塩によるセシウムの難溶性態化に飛灰中アルカリ元素が与える影響
  小堀満代; 東條安匡; 松尾孝之; 松藤敏彦
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• 遮断型最終処分場の稼働状況と搬入物の実態調査
  吉川倫太郎; 東條安匡; 松尾孝之; 松藤敏彦; 山田正人
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• 覆蓋型最終処分場の構造・運転管理に関する現状分析
  松藤敏彦; 東條安匡
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• 竪型ストーカ炉における塩化水素ガス発生・除去に関する研究
  黄仁姫; 二上雄斗; 松尾孝之; 松藤敏彦; 東條安匡; 山田裕史
  第30回廃棄物資源循環学会, 19 Sep. 2019, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• オンサイト製造消石灰の流動性評価手法の検討
  權田恭平; 黄仁姫; 松藤敏彦; 松尾孝之; 東條安匡; 木下亮
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• 一般廃棄物不燃・粗大ごみ中の希少金属量の推定
  髙橋悠; 松藤敏彦; 松尾孝之; 東條安匡
  第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
  19 Sep. 2019 - 21 Sep. 2019
• 建設混合廃棄物の資源化について～破砕選別処理の物質フロー～
  東條安匡
  令和元年度（2019年度）北海道循環資源利用促進協議会総会・部会合同会議総会記念講演, 17 Jul. 2019, Japanese, Public discourse
  [Invited]
• アルカリ長石の非晶質化の効率化とメカノケミカル反応によるセシウムの捕捉
  東條安匡; 福岡大河; 松尾孝之; 松藤敏彦
  第８回環境放射能除染研究発表会, 10 Jul. 2019, Japanese, Poster presentation
• Study on operation and disposed wastes in hazardous waste landfill
  Rintaro Kikkawa; Yasumasa Tojo; Toshihiko Matsuto; Takayuki Matsuo
  The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation
• Reduction of hydrogen chloride in the furnace of vertical type incinerator
  In-Hee Hwang; Yuto Futagami; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto
  The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation
• Factors affecting on leaching of lead from municipal solid waste incinerator residues
  Takaaki Soga; In-Hee Hwang; Toshihiko Matsuto; Takayuki Matsuo; Yasumasa Tojo
  The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation
• Evaluation methodology on flowability of on-site produced slaked lime
  Kyohei Gonda; In-Hee Hwang; Toshihiko Matsuto; Takayuki Matsuo; Yasumasa Tojo; Ryo Kinoshita
  The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation
• Material balance of bio-drying MBT facility for solid fuel production
  G.Y. Ham; T. Matsuto; T. Matsuo; N. Tsuboi; Y. Tojo; I. H. Hwang
  IWWG-ARB 2019, The 4th Symposium of International Waste Working Group Asian Regional Branch, 20 Feb. 2019, English, Oral presentation
  20 Feb. 2019 - 22 Feb. 2019
• On-site production of slaked lime for the treatment of MSWI flue gas: effects of production conditions on acid gas removal and flow property
  I.-H. Hwang; K. Gonda; T. Matsuo; Y. Tojo; T. Matsuto
  IWWG-ARB 2019, The 4th Symposium of IWWG Asian Regional Branch, 20 Feb. 2019, English, Oral presentation
  20 Feb. 2019 - 22 Feb. 2019
• INSOLUBILIZATION OF CESIUM CONTAINED IN FLY ASH BY ALUMINOSILICATE
  Y. TOJO; Y. ITOGA; T. MATSUO; T. MATSUTO
  IWWG-ARB 2019, The 4th Symposium of IWWG Asian Regional Branch, 20 Feb. 2019, English, Oral presentation
  20 Feb. 2019 - 22 Feb. 2019
• Study on the Drying Process of the Solid Waste in Landfill under Arid Climate
  Kanta Okamoto; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  The 10th Asia-Pacific Landfill Symposium, 24 Nov. 2018, English, Oral presentation
  24 Nov. 2018 - 26 Nov. 2018
• コンバインド式メタン発酵施設におけるマテリアルフロー分析
  坪井成浩; 松藤敏彦; 松尾孝之; Eliza Canabal; 東條安匡; 黄仁姫
  第26回衛生工学シンポジウム, 08 Nov. 2018, Japanese, Poster presentation
  08 Nov. 2018 - 08 Nov. 2018
• コンバインド式メタン発酵施設におけるマテリアルフロー分析
  坪井成浩; 松藤敏彦; 松尾孝之; カナバル エリザ; 東條安匡; 黄仁姫
  2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation
• オンサイト製造消石灰の流動性評価方法の提案と製造条件の影響
  権田恭平; 黄 仁姫; 松藤敏彦; 松尾孝之; 東條安匡
  2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation
• 一般廃棄物焼却施設焼却灰からの鉛溶出への影響要因に関する研究
  曽我孝彰; 黄 仁姫; 松藤敏彦; 松尾孝之; 東條安匡
  2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation
• メカノケミカル反応によるアルカリ長石の粉砕過程での非結晶化とCs 捕捉
  福岡大河; 東條安匡; 松藤敏彦; 松尾孝之
  2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation
• 遮断型最終処分場の長期的な環境安全性の評価に関する研究,
  吉川倫太郎; 東條安匡; 松藤敏彦; 松尾孝之
  2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation
• Introduction on the guideline of the landfill environmental auditing
  Yasumasa Tojo
  National Seminar at Tehran Waste Management Organization, 10 Oct. 2018, English, Public discourse
  10 Oct. 2018 - 10 Oct. 2018, [Invited]
• コンバインド式メタン発酵施設におけるマテリアルフロー分析
  坪井成浩; 松藤敏彦; 松尾孝之; カナバル エリザ; 東條安匡; 黄 仁姫
  第29回廃棄物学会研究発表会, 13 Sep. 2018, Japanese, Oral presentation
  12 Sep. 2018 - 14 Sep. 2018
• 消石灰の焼却施設オンサイト製造における高反応化およびハンドリング性の改善に関する研究
  黄 仁姫; 酒井裕太郎; 松尾孝之; 東條安匡; 松藤敏彦
  第29回廃棄物学会研究発表会講演論文集, 13 Sep. 2018, Japanese, Poster presentation
  12 Sep. 2018 - 14 Sep. 2018
• 乾燥地域の埋立地における廃棄物の乾燥化メカニズムの解明
  岡本侃大; 東條安匡; 松尾孝之; 松藤敏彦
  第29回廃棄物資源循環学会研究発表会, 12 Sep. 2018, Japanese, Oral presentation
  12 Sep. 2018 - 14 Sep. 2018
• アルミノ珪酸塩による飛灰中セシウムの難溶性態化
  糸賀悠里香; 東條安匡; 松尾孝之; 松藤敏彦
  第29回廃棄物学会研究発表会講演論文集, 12 Sep. 2018, Japanese, Poster presentation
  12 Sep. 2018 - 14 Sep. 2018
• What hindered the smooth disaster waste disposal
  Yasumasa Tojo
  The 10th Intercontinental Landfill Research Symposium, 27 Jun. 2018, English, Nominated symposium
• Study on the drying process of the solid waste in landfill under arid climate
  Yasumasa Tojo; Kanta Okamoto; Takayuki Matsuo; Toshihiko Matsuto
  The 10th Intercontinental Landfill Research Symposium, 27 Jun. 2018, English, Poster presentation
• Influencing factor on acid gas removal and flow characteristics of slaked lime in onsite production process
  In-Hee Hwang; Yutaro Sakai; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto
  22nd Korea-Japan Joint International Session, The 2018 Spring Conference of the Korea Society of Waste Management, 10 May 2018
  10 May 2018 - 10 May 2018
• Investigation of the effect of Electrocoagulation operational parameters on the leachability of arsenic in sludge
  Wani Lukak; Yasumasa Tojo
  22nd Korea-Japan Joint International Session, The 2018 Spring Conference of the Korea Society of Waste Management, 10 May 2018
  10 May 2018 - 10 May 2018
• Estimation of sorting efficiency and material flow in combined type anaerobic digestion facility
  Naruhiro Tsuboi; Toshihiko Matsuto; Takayuki Matsuo; Yasumasa Tojo; In-Hee Hwang
  22nd Korea-Japan Joint International Session, The 2018 Spring Conference of the Korea Society of Waste Management, 10 May 2018
  10 May 2018 - 10 May 2018
• Current issues of the landfills in Palestine and how can we solve them
  Yasumasa TOJO
  Opening Seminar of "SOLID WASTE MANAGEMENT SEMINAR FOR FUTURE ENGINEERS", 26 Mar. 2018, English, Public discourse
  26 Mar. 2018 - 26 Mar. 2018, [Invited]
• Urgent needs for reduction of waste being disposed of into the landfill- otherwise, the same situation continues-
  Yasumasa TOJO
  Final Seminar of "The Project for Technical Assistance in Solid Waste Management in Palestine (Stage I), 18 Mar. 2018, English, Public discourse
  18 Mar. 2018 - 18 Mar. 2018, [Invited]
• 焼却主灰中の難溶性態セシウムが結晶表面の非晶質相に濃集する機構の解明とその応用
  東條安匡
  環境研究総合推進費平成２９年度終了課題成果報告会, 09 Mar. 2018, Japanese, Public discourse
  09 Mar. 2018 - 09 Mar. 2018, [Invited]
• 下水汚泥焼却灰へのセシウム濃集機構の解明と除染廃棄物への応用
  小堀満代; 東條安匡; 松尾孝之; 松藤敏彦; 黄 仁姫
  第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
  10 Nov. 2017 - 10 Nov. 2017
• 竪型ストーカ式焼却炉の運転特性評価
  山中康平; 黄 仁姫; 松尾孝之; 東條安匡; 松藤敏彦
  第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
  10 Nov. 2017 - 10 Nov. 2017
• 焼却排ガス処理用の高性能消石灰製造に関する研究
  二上雄斗; 黄 仁姫; 松尾孝之; 東條安匡; 松藤敏彦
  第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
  10 Nov. 2017 - 10 Nov. 2017
• 乾燥地における高濃度浸出水の合理的な処方法関す研究
  池田泰良; 東條安匡; 松尾孝之; 松藤敏彦
  第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
  10 Nov. 2017 - 10 Nov. 2017
• ものを自然に返すということ。−物質循環と廃棄物処理−
  東條安匡
  北大セミナーinオホーツク, 07 Oct. 2017, Japanese, Public discourse
  07 Oct. 2017 - 07 Oct. 2017
• 熱処理を介したアルミノケイ酸塩による廃棄物中セシウムの難溶性態化
  坂本さくら; 東條安匡; 松尾孝之; 松藤敏彦
  第28回廃棄物資源循環学会研究発表会, 06 Sep. 2017, Japanese, Oral presentation
  06 Sep. 2017 - 06 Sep. 2017
• 乾燥地域に位置する埋立地における廃棄物の乾燥過程に関する研究
  百瀬大峰; 東條安匡; 松尾孝之; 松藤敏彦
  第28回廃棄物資源循環学会研究発表会, 06 Sep. 2017, Japanese, Poster presentation
  06 Sep. 2017 - 06 Sep. 2017
• ごみ焼却排ガス乾式処理での塩化水素と消石灰の反応メカニズム
  黄 仁姫; 須藤 航; 松尾孝之; 東條安匡; 松藤 敏彦
  第28回廃棄物資源循環学会研究発表会, 06 Sep. 2017
  06 Sep. 2017 - 06 Sep. 2017
• 海面処分場内水位以深に存在する焼却残渣埋立物におけるマンガンの動態解明(その３)
  東條安匡
  廃棄物の適正処理・水処理に係る調査研究助成制度研究成果発表会, 19 Jul. 2017, Japanese, Public discourse
• 途上国、特に乾燥地域における廃棄物埋立の課題と技術協力の難しさ
  東條安匡
  日本環境学会第43回研究発表会発表予稿集, 02 Jul. 2017, Japanese, Nominated symposium
  02 Jul. 2017 - 02 Jul. 2017, [Invited]
• Study of domestic scale anaerobic digestion practices in Sri Lanka
  Praween Madusanka; 東條安匡; 松藤敏彦
  平成29年度廃棄物資源循環学会春の研究発表会, 02 Jun. 2017, English, Poster presentation
  02 Jun. 2017 - 02 Jun. 2017
• Future Research Needs for MBT in Asia Based on Literature Review Survey
  Eliza Canabal; 松藤敏彦; 東條安匡; 黄 仁姫
  平成29年度廃棄物資源循環学会春の研究発表会, 02 Jun. 2017, English, Poster presentation
• Evaluation of operational characteristics of vertical type incinerator
  Kohei Yamanaka; In-Hee Hwang; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto; Yuji Yamada; Ryoji Sameshima
  21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
  11 May 2017 - 11 May 2017
• Experimental study on reaction of slaked lime and hydrogen chloride in dry scrubbing of flue gas generated from waste incinerator
  In-Hee Hwang; Wataru Sudo; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto
  21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
  11 May 2017 - 11 May 2017
• Production of high-performance slaked lime for waste incineration flue gas treatment
  Yuto Futagami; In-Hee Hwang; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto
  21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
  11 May 2017 - 11 May 2017
• Study on the accumulation mechanism of cesium into incineration ash of sewage sludge and its application to the decontamination waste
  Michiyo Kobori; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
  11 May 2017 - 11 May 2017
• Study on the feasible treatment process for highly concentrated landfill leachate generated in arid region
  Taira Ikeda; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
  11 May 2017 - 11 May 2017
• Future Research Needs for MBT in Asia Based on Literature Review Survey
  Eliza CANABAL; Yasumasa TOJO; In-Hee HWANG; Toshihiko MATSUTO
  IWWG-ARB Symposium, 12 Apr. 2017, English, Oral presentation
  12 Apr. 2017 - 12 Apr. 2017
• 海岸漂着物対策−特に災害に伴う流木（及び木くず）の処理について
  東條安匡
  平成28年度守ろう美しい北海道！海ごみ・ポイ捨て防止大会シンポジウム, 13 Jan. 2017, Japanese, Public discourse
  13 Jan. 2017 - 13 Jan. 2017, [Invited]
• 焼却主灰中の難溶性態セシウムが結晶表面の非晶質相に濃集する機構の解明とその応用
  東條安匡
  平成28年度循環型社会形成推進研究発表会, 13 Dec. 2016, Japanese, Nominated symposium
  13 Dec. 2016 - 13 Dec. 2016, [Invited]
• INFLUENCE OF WEATHERING OF BOTTOM ASH ON THE LEACHING BEHAVIOR OF CESIUM
  Yasumasa Tojo; Saori Iwamoto; Mikako Ishii; Toshihiko Matsuto; Takayuki Matsuo
  Sixth International Conference on Geotechnique, Construction Materials and Environment, 16 Nov. 2016, English, Oral presentation
• 乾燥地域を対象とした埋立地中廃棄物の乾燥化シミュレーション
  岡本侃大; 東條安匡; 松藤敏彦; 松尾孝之
  第24回衛生工学シンポジウム, 15 Nov. 2016, Japanese, Poster presentation
  15 Nov. 2016 - 15 Nov. 2016
• 海面処分場内水ポンド中Mn濃度低減を目的とした焼却灰層への浸出水循環果
  阿部知恵子; 東條安匡; 松藤敏彦; 松尾孝之
  第24回衛生工学シンポジウム, 15 Nov. 2016, Japanese, Poster presentation
  15 Nov. 2016 - 15 Nov. 2016
• 乾燥地域の蒸発依存型浸出水処理における悪臭改善に関する研究
  糸賀悠里香; 東條安匡; 松藤敏彦; 松尾孝之
  第24回衛生工学シンポジウム, 15 Nov. 2016, Japanese, Poster presentation
  15 Nov. 2016 - 15 Nov. 2016
• 災害時に発生する廃棄物の処理と課題−東日本大震災で経験されたこと−
  東條安匡
  大規模災害時の災害廃棄物対策セミナー〜過去の教訓に学ぶ災害廃棄物処理計画策定等の対策について〜, 27 Oct. 2016, Japanese, Public discourse
  27 Oct. 2016 - 27 Oct. 2016, [Invited]
• 最終処分場における物質変換と安定化について
  東條安匡
  第27回廃棄物資源循環学会研究発表会特別セッション2「海面最終処分場の課題と役割-フェニックス事業を題材として-」, 28 Sep. 2016, Japanese, Nominated symposium
  28 Sep. 2016 - 28 Sep. 2016, [Invited]
• セシウムを表面に特異的に濃集する焼却主灰粒子の鉱物種の同定
  田村和樹; 東條安匡; 松尾孝之; 松藤敏彦
  第27回廃棄物資源循環学会研究発表会, 27 Sep. 2016, Japanese, Oral presentation
  27 Sep. 2016 - 27 Sep. 2016
• 実験および現地測定による準好気性埋立地内空気流動メカニズムに関する研究
  山田修平; 松藤敏彦; 東條安匡; 松尾孝之
  第27回廃棄物資源循環学会研究発表会, 27 Sep. 2016, Japanese, Oral presentation
  27 Sep. 2016 - 27 Sep. 2016
• 海面処分場内水位以深に存在する焼却残渣埋立物におけるﾏﾝｶﾞﾝの動態解明(その2)
  東條安匡; 阿部知恵子; 松尾孝之; 松藤敏彦
  平成27年度「廃棄物・海域水環境保全に係る調査研究費助成制度」研究成果発表会要旨集, 20 Jul. 2016, Japanese, Public discourse
  20 Jul. 2016 - 20 Jul. 2016
• What is the appropriate strategy of landfill management in arid climate?
  Yasumasa Tojo; Takayuki Matsuo; Hirotaka Momose; Toshihiko Matsuto
  The 9th Intercontinental Landfill Research Symposium, 13 Jun. 2016, English, Nominated symposium
  13 Jun. 2016 - 13 Jun. 2016, [Invited]
• Effect of leachate recirculation into incineration ash layer for lowering manganese concentration in leachate pond in sea landfill
  Chieko Abe; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
  12 May 2016 - 12 May 2016
• Reduction measures of odor generated from leachate treatment by evaporation in arid region
  Yurika Itoga; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
  12 May 2016 - 12 May 2016
• Review on the various Remediation Projects on Dumpsites in Developing Countries
  Harrison Odhiambo; Yasumasa Tojo; Toshihiko Matsuto
  20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
  12 May 2016 - 12 May 2016
• Simulation on the drying process of the waste in landfill under arid climate
  Kanta Okamoto; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
  12 May 2016 - 12 May 2016
• 乾燥地域の廃棄物埋立地における有機物分解に関する研究
  百瀬大峰; Tahereh Malmir; 田村和樹; 東條安匡; 松尾孝之; 松藤敏彦
  第23回衛生工学シンポジウム, 12 Nov. 2015, Japanese, Poster presentation
  12 Nov. 2015 - 12 Nov. 2015
• 焼却底灰中のセシウムが結晶粒子周辺の非晶質相に濃集する機構の解明
  坂本さくら; 東條安匡; 松藤敏彦; 松尾孝之
  第23回衛生工学シンポジウム, 12 Nov. 2015, Japanese, Poster presentation
  12 Nov. 2015 - 12 Nov. 2015
• 乾燥気候地域に位置する都市ごみ埋立地での長期的な浸出水生成予測
  野村 弘; 東條安匡; 松尾孝之; 松藤敏彦
  第26回廃棄物資源循環学会研究発表会, 02 Sep. 2015, Japanese, Oral presentation
  02 Sep. 2015 - 02 Sep. 2015
• 焼却底灰における結晶粒子周辺の非晶質相へのセシウム濃集機構の解明
  坂本さくら; 東條安匡; 松尾孝之; 松藤敏彦
  第26回廃棄物資源循環学会研究発表会, 02 Sep. 2015, Japanese, Poster presentation
  02 Sep. 2015 - 02 Sep. 2015
• Capturing Mechanism Of Cesium In Incineration Bottom Ash And Its Long-term Stability
  Yasumasa TOJO; Mikako ISHII; Saori IWAMOTO; Toshihiko MATSUTO; Takayuki MATSUO; Takayuki SHIMAOKA
  3rd International Conference on Final Sinks, 23 Aug. 2015, English, Oral presentation
  23 Aug. 2015 - 23 Aug. 2015
• Municipal solid waste management in Tehran: the changes during the last five years
  T. Malmir; Y. Tojo
  2nd International Conference on Waste Management and Environment (ICWME), 21 Aug. 2015, Japanese, Oral presentation
• Basic Study On Wood Waste Degradation By White Rot Fungi And Synthesis Of Humic Substance
  Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  The 6th China-Japan Joint Conference on Material Recycling and Solid Waste Management, 06 Aug. 2015, English, Oral presentation
  06 Aug. 2015 - 06 Aug. 2015
• 海面処分場内水位以深に存在する焼却残渣埋立物におけるマンガンの動態解明
  東條安匡; 田村和樹
  平成26年度「廃棄物・海域水環境保全に係る調査研究費助成制度」成果発表会, 22 Jul. 2015, Japanese, Oral presentation
  22 Jul. 2015 - 22 Jul. 2015
• ものを自然に返すということ〜物質循環と廃棄物処理〜
  東條安匡
  北海道滝川高等学校「オープンスクール」特別講演, 20 Jun. 2015, Japanese, Public discourse
  20 Jun. 2015 - 20 Jun. 2015, [Invited]
• 安全・安心な埋立地の要件
  東條安匡
  平成27年度廃棄物資源循環学会主催第1回セミナー「廃棄物処理と資源循環の課題と展望」, 29 May 2015, Japanese, Nominated symposium
  29 May 2015 - 29 May 2015, [Invited]
• Study on the accumulation mechanism of cesium in the amorphous phase around mineral particle in incineration bottom ash
  Sakura Sakamoto; Yasumasa Tojo; Toshihiko Matsuto; Takayuki Matsuo
  2nd 3R International Scientific Conference, 21 May 2015, English, Poster presentation
  21 May 2015 - 21 May 2015
• Experimental study on the biodegradation process of organic waste in landfill under arid climate
  Hirotaka Momose; Tahereh Malmir; Kazuki Tamura; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  2nd 3R International Scientific Conference, 21 May 2015, English, Poster presentation
  21 May 2015 - 21 May 2015
• Prediction of leachate formation under arid climate by using water balance Model
  Tahereh Malmir; Hiroshi Nomura; Yasumasa Tojo; Toshihiko Matsuto; Takayuki Matsuo
  2nd 3R International Scientific Conference, 21 May 2015, English, Poster presentation
  21 May 2015 - 21 May 2015
• Influence of landfilling works on the stabilization of inorganic waste residue in landfill
  Yasumasa TOJO; Kazuki TAMURA; Toshihiko MATSUTO; Takayuki MATSUO; Yugo ISOBE; Masatoshi TSUBAKI
  2nd symposium of Asian Regional Branch of International Waste Working Group (IWWG-ARB), 13 Apr. 2015, English, Oral presentation
• 放射性セシウムの存在形態からみた長期挙動
  東條安匡; 石井三香子; 松尾孝之; 松藤敏彦; 岩本早織; 島岡隆行
  廃棄物資源循環学会平成26年度第２回講演会−放射能汚染廃棄物処理に関する科学的理解−, 08 Dec. 2014
  08 Dec. 2014 - 08 Dec. 2014, [Invited]
• Leaching behavior of Cesium contained in incineration bottom ash and its long-term stability
  Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto; Takayuki Shimaoka
  8th Intercontinental Landfill Research Symposium, 19 Oct. 2014, English, Poster presentation
  19 Oct. 2014 - 19 Oct. 2014
• 埋立工法が中間処理残渣埋立物の安定化に及ぼす影響
  東條安匡; 田村和樹; 松尾孝之; 松藤敏彦; 磯部友護; 椿 雅俊; 小野雄策
  第25回廃棄物資源循環学会研究発表会, 15 Sep. 2014
  15 Sep. 2014 - 15 Sep. 2014
• 中間処理残さ主体埋立物の安定化遅延機構に関する生物学的な検討
  石垣智基; 鈴木和将; 磯部友護; 川嵜幹生; 山田正人; 東條安匡
  第25回廃棄物資源循環学会研究発表会, 15 Sep. 2014
  15 Sep. 2014 - 15 Sep. 2014
• 焼却主灰中難溶性セシウムの存在形態とその長期安定性に関する研究
  東條安匡; 石井美香子; 松尾孝之; 松藤 敏彦; 島岡 隆行
  第25回廃棄物資源循環学会研究発表会, 15 Sep. 2014, Japanese, Oral presentation
  15 Sep. 2014 - 15 Sep. 2014
• Potential of Hydrogen Sulfide Formation from Fine Residue Generated from Mixed C&D Waste Sorting Process on Its Utilization
  Yasumasa Tojo; Yasuaki Ando; Takayuki Matsuo; Toshihiko Matsuto
  Proceedings of the 5th China-Japan Joint Conference for the Community Formation on Material Recycling and Waste Management, 14 Jul. 2014
  14 Jul. 2014 - 14 Jul. 2014
• Influence of landfilling works on the stabilization of inorganic waste residue in landfill
  Kazuki Tamura; Yasumasa Tojo; Takayuki Matsuo; In-Hee Hwang; Toshihiko Matsuto
  18th Korea-Japan Joint International Session, The 2014 Spring Conference of the Korea Society of Waste Management, 15 May 2014
  15 May 2014 - 15 May 2014
• Leaching behavior of cesium contained in incineration bottom ash
  Yasumasa Tojo; Ryo Kinoshita; Takayuki Matsuo; Toshihiko Matsuto
  Annual Conference on Civil Engineering and Engineering, 15 Mar. 2014
  15 Mar. 2014 - 15 Mar. 2014
• 大規模埋立実験槽の安定化に関する研究
  磯部友護; 渡辺洋一; 椿雅俊; 小野雄策; 東條安匡
  第35回全国都市清掃研究・事例発表会, 23 Jan. 2014
  23 Jan. 2014 - 23 Jan. 2014
• 安定化から見た管理型最終処分場の内部性状に関する研究
  磯部友護; 椿雅俊; 東條安匡
  第34回全国都市清掃研究・事例発表会, 23 Jan. 2014
  23 Jan. 2014 - 23 Jan. 2014
• 焼却灰の固結が重金属類の放出に与える影響
  野村 弘; 東條安匡; 松尾孝之; 黄 仁姫; 松藤敏彦
  第24回廃棄物学会研究発表会, 02 Nov. 2013, Japanese, Poster presentation
  02 Nov. 2013 - 02 Nov. 2013
• 焼却主灰中セシウムの存在形態と溶出挙動に関する研究
  木下 亮; 東條安匡; 松尾孝之; 黄 仁姫; 松藤敏彦; 島岡隆行
  第24回廃棄物学会研究発表会, 02 Nov. 2013, Japanese, Poster presentation
  02 Nov. 2013 - 02 Nov. 2013
• 風化促進試験による焼却主灰の風化変質がセシウムの挙動に与える影響
  東條安匡; 岩本早織; 松尾孝之; 松藤敏彦; 黄 仁姫; 島岡隆行
  第24回廃棄物学会研究発表会, 02 Nov. 2013
  02 Nov. 2013 - 02 Nov. 2013
• 金属化合物を添加した活性白土によるごみ焼却排ガス中有機塩素化合物の脱塩素化
  黄 仁姫; 金森 敦; 高橋 滋敏; 松尾 孝之; 松藤 敏彦; 東條 安匡
  第24回廃棄物学会研究発表会, 02 Nov. 2013
  02 Nov. 2013 - 02 Nov. 2013
• 風化促進試験による焼却主灰の風化変質がセシウムの挙動に与える影響
  東條安匡; 岩本早織; 松尾孝之; 黄仁姫; 松藤敏彦; 島岡隆行
  第２回環境放射能除染研究発表会, 05 Jun. 2013, Japanese, Poster presentation
• Study on the influence of solidification of MSWI bottom ash on the emission of easily mobile elements
  Yasumasa Tojo; Mikako Ishii; Toshihiko Matsuto; Takayuki Matsuo
  2nd International Conference on Final Sinks, 16 May 2013, English, Poster presentation
• Questionnaire survey on operation and maintenance of semi-aerobic landfill in Japan
  Xin Zhang; Toshihiko Matsuto; Toshihiko Matsuto; Takayuki Matsuo; Yasumasa Tojo
  17th Korea-Japan Joint International Session, The 2013 Spring Conference of the Korea Society of Waste Management, 08 May 2013, English, Poster presentation
  08 May 2013 - 08 May 2013
• Influence of bottom ash solidification on leaching behavior of heavy metals
  Hiroshi Nomura; Yasumasa Tojo; Takayuki Matsuo; In-Hee Hwang; Toshihiko Matsuto
  17th Korea-Japan Joint International Session, The 2013 Spring Conference of the Korea Society of Waste Management, 08 May 2013, English, Poster presentation
  08 May 2013 - 08 May 2013
• Dechlorination of organochlorine compound in flue gas from municipal solid waste incinerator using metal compound added activated clay
  In-Hee Hwang; Atsushi Kanamori; Shigetoshi Takahashi; Takayuki Matsuo; Yasumasa Tojo; Toshihiko Matsuto; Masaharu Ohue; Yoshitada Kakuta
  17th Korea-Japan Joint International Session, The 2013 Spring Conference of the Korea Society of Waste Management, 08 May 2013, English, Poster presentation
  08 May 2013 - 08 May 2013
• Assessment of aerobic condition in a roofed landfill with semi-aerobic structure
  Xin Zhang; Toshihiko Matsuto; Takayuki Matsuo; Yasumasa Tojo
  The 12th Expert Meeting on Solid Waste Management in Asia and Pacific Islands (SWAPI), 26 Feb. 2013
  26 Feb. 2013 - 26 Feb. 2013
• Dechlorination of mono-chlorobenzene in flue gas of municipal solid waste incinerator using activated clay
  Shigetoshi Takahashi; In-Hee Hwang; Takayuki Matsuo; Toshihiko Matsuto; Yasumasa Tojo
  The 12th Expert Meeting on Solid Waste Management in Asia and Pacific Islands (SWAPI), 26 Feb. 2013
  26 Feb. 2013 - 26 Feb. 2013
• 戻し堆肥を行う生ごみ堆肥化施設の処理特性と運転改善に関する研究
  西俊輔; 黄仁姫; 松藤敏彦; 松尾孝之; 東條安匡
  第20回衛生工学シンポジウム, 04 Dec. 2012, Japanese, Poster presentation
  04 Dec. 2012 - 04 Dec. 2012
• 埋立地における焼却灰固結機構の解明および洗い出し効果に与える影響
  石井三香子; 東條安匡; 松尾孝之; 黄仁姫; 松藤敏彦
  第20回衛生工学シンポジウム, 04 Dec. 2012, Japanese, Poster presentation
  04 Dec. 2012 - 04 Dec. 2012
• 廃棄物埋立地における多環芳香族炭化水素の好気性微生物分解に関する研究
  長谷川健太; 東條安匡; 松藤敏彦; 松尾孝之; 黄仁姫
  第20回衛生工学シンポジウム, 04 Dec. 2012, Japanese, Poster presentation
  04 Dec. 2012 - 04 Dec. 2012
• 活性白土を用いたごみ焼却排ガス中クロロベンゼンの脱塩素効果に関する研究
  高橋滋敏; 黄仁姫; 松尾孝之; 松藤敏彦; 東條安匡
  第23回廃棄物資源循環学会研究発表会, 22 Oct. 2012, Japanese
  22 Oct. 2012 - 22 Oct. 2012
• Feasibility of hydrothermal treatment for recovery of liquid fertilizer from scallop entrails
  In-Hee Hwang; Hiroya Aoyama; Takayuki Matsuo; Toshihiko Matsuto; Yasumasa Tojo
  Proc. f the 23rd Annual Conference of Japan Society of Material Cycles and Waste Management, 22 Oct. 2012
  22 Oct. 2012 - 22 Oct. 2012
• 各種粘土鉱物及び自然土壌を用いたセシウム・ストロンチウムの吸脱着反応
  加古賢一郎; 鈴木和将; 川嵜幹生; 東條安匡; 小野雄策
  第23回廃棄物学会研究発表会, 22 Oct. 2012
  22 Oct. 2012 - 22 Oct. 2012
• 焼却残渣埋立地における多環芳香族炭化水素の長期的な放出予測
  佐藤昌宏; 佐藤昌宏; 東條安匡; 松尾孝之; 松藤敏彦
  第23回廃棄物学会研究発表会, 22 Oct. 2012
  22 Oct. 2012 - 22 Oct. 2012
• 焼却主灰の固結化が塩類洗い出しに与える影響に関する基礎的検討
  東條安匡; 石井美香子; 松尾孝之; 松藤敏彦
  第23回廃棄物学会研究発表会, 22 Oct. 2012
  22 Oct. 2012 - 22 Oct. 2012
• Verification by Coupled Simulation on the Effect of Vertical Gas Ventilation Pipes Installed for Promoting Waste Stabilization
  Yasumasa Tojo; Natsuki Kishizawa; Toshihiko Matsuto
  Seminar and Workshop on Landfill Operation & Management in Tropical Country, 26 Aug. 2012, English, Invited oral presentation
  [Invited]
• 最終処分場の中間覆土におけるセシウム・ストロンチウム吸脱着
  加古賢一郎; 村上大; 小野雄策; 鈴木和将; 東條安瓠
  第34回全国都市清掃研究・事例発表会抄録集, 24 Jul. 2012
  24 Jul. 2012 - 24 Jul. 2012
• 建設混合廃棄物破砕選別施設における疼下残渣の安定型処分または資源利用可能性の検討
  東條安匡; 安藤泰明; 松尾孝之; 松藤敏彦; 黄仁姫
  平成24年度廃棄物資源循環学会研究討論会, 31 May 2012
  31 May 2012 - 31 May 2012
• 埋立地における多環芳族炭化水素の長期的放出予測に関する研究
  佐藤昌宏; 東條安匡; 松尾孝之; 松藤敏彦
  平成24年度廃棄物資源循環学会研究討論会, 31 May 2012
  31 May 2012 - 31 May 2012
• ホタテ内臓処理の現状および亜臨界水熱処理によるホタテ内臓からの液肥回収可能性の検討
  黄仁姫; 青山普哉; 松藤敏彦; 東條安匡; 松尾孝之
  平成24年度廃棄物資源循環学会研究討論会, 31 May 2012
  31 May 2012 - 31 May 2012
• Investigation on the solidification process of MSW bottom ash and their effect on the washout
  Mikako Ishii; Yasumasa Tojo; Takayuki Matsuo; Hwang In-Hee; Toshihiko Matsuto
  16th Korea-Japan Joint International Session, The 2012 Spring Conference of the Korea Society of Waste Management, 10 May 2012
  10 May 2012 - 10 May 2012
• Prediction on the long-term fate of polycyclic aromatic hydrocarbons in the landfill brought by municipal solid waste incineration residue
  Masahiro Sato; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  16th Korea-Japan Joint International Session, The 2012 Spring Conference of the Korea Society of Waste Management, 10 May 2012
  10 May 2012 - 10 May 2012
• Aerobic biodegradation of polycyclic aromatic hydrocarbons in landfill
  Kenta Hasegawa; Yasumasa Tojo; Toshihiko Matsuto; Takayuki Matsuo; Hwang In-Hee
  16th Korea-Japan Joint International Session, The 2012 Spring Conference of the Korea Society of Waste Management, 10 May 2012
  10 May 2012 - 10 May 2012
• 広域処理の難しさ（被災県の窮状―岩手県を例に）
  東條安匡
  平成23年度廃棄物資源循環学会北海道支部セミナー, 10 Dec. 2011, Public discourse
  10 Dec. 2011 - 10 Dec. 2011
• 廃棄物最終処分場におけるセシウムの吸脱着特性の評価
  鈴木和将; 川嵜幹生; 渡辺洋一; 加古賢一郎; 小野雄策; 遠藤和人; 山田正人; 東條安匡
  全国都市清掃研究・事例発表会講演論文集, Dec. 2011
  Dec. 2011 - Dec. 2011
• 東日本大震災発生後早期に生じた多くの課題（災害廃棄物を中心に）
  東條安匡
  第19回衛生工学シンポジウム, 18 Nov. 2011
  18 Nov. 2011 - 18 Nov. 2011
• 亜臨界水熱処理によるホタテ内蔵からの液肥回収に関する研究
  黄 仁姫; 阿部夏季; 松藤敏彦; 東條安匡; 松尾孝之
  第22回廃棄物学会研究発表会, 03 Nov. 2011, Japanese, Oral presentation
  03 Nov. 2011 - 03 Nov. 2011
• 建設混合廃棄物破砕選別残渣中の生物分解性有機炭素の分画と硫化水素生成能
  東條安匡; 斎藤隆生; 松尾孝之; 黄 仁姫; 松藤敏彦
  第22回廃棄物学会研究発表会, 03 Nov. 2011, Japanese, Oral presentation
  03 Nov. 2011 - 03 Nov. 2011
• Resource Recovery from Mixed Construction and Demolition Waste
  Yasumasa Tojo
  The 3rd China-Japan Joint Conference for the community formation on material recycling and waste management, 27 Aug. 2011
  27 Aug. 2011 - 27 Aug. 2011
• 埋立廃棄物由来の溶存有機炭素への多環芳香族炭化水素の吸着特性
  佐藤昌宏; 東條安匡; 岩本早織; 松藤敏彦; 松尾孝之
  平成23年度廃棄物資源循環学会研究討論会, 31 May 2011
  31 May 2011 - 31 May 2011
• 硫化水素生成に寄与する建設混合廃棄物破砕選別残渣中の生物分解性有機物の定量
  東條安匡; 松尾孝之; 黄 仁姫; 松藤敏彦
  平成23年度廃棄物資源循環学会研究討論会, 31 May 2011
  31 May 2011 - 31 May 2011
• Sorption characteristics of PAHs on the dissolved organic carbon derived from waste
  Saori Iwamoto; Yasumasa Tojo; Masahiro Sato; Toshihiko Matsuto; Takayuki Matsuo
  15th Korea-Japan Joint International Session, The 2011 Spring Conference of the Korea Society of Waste Management, May 2011
  May 2011 - May 2011
• さまざまな有機性廃棄物のメタン発酵処理における炭素および肥料成分収支
  板倉彩夏; 松藤敏彦; 張会均; 東條安匡
  第21回廃棄物学会研究発表会講演論文集, 04 Nov. 2010
  04 Nov. 2010 - 04 Nov. 2010
• 都市ごみ焼却残渣からの多環芳香族炭化水素抽出溶媒の検討
  佐藤昌宏; 東條安匡; 倉田泰人; 松尾孝之; 松藤敏彦
  第21回廃棄物学会研究発表会講演論文集, 04 Nov. 2010
  04 Nov. 2010 - 04 Nov. 2010
• 建設混合廃棄物破砕選別施設における資源分離能に関する調査
  東條安匡; 安藤泰明; モンテロ アロンソ; 松尾孝之; 松藤敏彦; 山田 正人
  第21回廃棄物学会研究発表会講演論文集, 04 Nov. 2010
  04 Nov. 2010 - 04 Nov. 2010
• Leaching Characteristics of Organic Compounds from Mixed C&D Waste Residue
  Alonso Montero; Yasumasa Tojo; Matsuo Takayuki; Matsuto Toshihiko; Masato Yamada
  Proc. Of the 21st Annual Conference of Japan Society of Material Cycles and Waste Management, 04 Nov. 2010
  04 Nov. 2010 - 04 Nov. 2010
• Characterization of Fly Ash from Municipal Solid Waste Melting Furnace in Hokkaido
  INANO HIROYUKI; ITABASHI KOJI; AKAZAWA TOSHIYUKI; HORIKAWA HIROYOSHI; TOMITA KEIICHI; OKADA TAKASHI; TOJO YASUMASA
  北海道立総合研究機構工業試験場報告, 31 Aug. 2010, Japanese
  31 Aug. 2010 - 31 Aug. 2010
• Investigation of PAHs concentration in several incineration residues and simple estimation of their fate in landfill
  Masahiro Sato; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  Proceedings of the 6th Intercontinental Landfill Research Symposium, 08 Jun. 2010
  08 Jun. 2010 - 08 Jun. 2010
• Efficiency of resource recovery in mixed construction and demolition waste sorting process
  Yasuaki Ando; Yasumasa Tojo; Tosihiko Mastuto; Takayuki Matuo
  Proceedings of the 14th Korea-Japan Joint International Session in the 2010 Spring Conference of the Korea Society of Waste Management, May 2010
  May 2010 - May 2010
• Experimental Study on the Effect of Forced Aeration on Carbon Fate in Landfill
  Natsuki Kishizawa; Yasumasa Tojo; Toshihiko Matsuto
  Proceedings of the 14th Korea-Japan Joint International Sessionin the 2010 Spring Conference of the Korea Society of Waste Management, May 2010
  May 2010 - May 2010
• COMPARISON OF LEACHING CHARACTERISTICS OF SULFATE AND TOC FROM MIXED C&D WASTE RESIDUE, AGRICULTURAL FERTILIZERS AND SOIL CONDITIONERS
  A. Montero; Y. Tojo; T. Matsuo; T. Matsuto; M. Yamada
  2ND INTERNATIONAL CONFERENCE ON WASTE ENGINEERING MANAGEMENT, ICWEM 2010, 2010, R I L E M PUBLICATIONS, English
  2010 - 2010, Inoue (2005) reported that H2S generation in landfills significantly increases by disposal of waste gypsum board because it contains sulfate and organic matter Shredded residue generated from sorting facility of mixed construction and demolition (C&D) waste is also suspected of the source of sulfate and organic matter so that it became difficult to dispose of It into non controlled landfill However H2S generation was hardly identified in Inoue's study Then, it is deemed that potential of H2S generation from the residue must be evaluated from the viewpoint of releasing sulfate and organic matter Several fertilizers and soil conditioners contain both sulfate and organic matter Therefore, the purpose of this research is to investigate the leaching behavior of materials containing both sulfate and organic matter and to compare it against the residue s For this eleven samples including C&D waste residue fertilizers and soil conditioners will be used in a serial batch test, to evaluate its long-term leaching behavior For the obtained leachate, sulfate ton, TOC, VFA (acetic, lactic and propionic acid) and glucose were measured in order to determine how they are different among the samples
• Landfill Management-2, Post-closure Care and its Completion
  Yasumasa TOJO
  China-Japan Joint Conference for the Community Formation on Material Recycling and Solid Waste Management, Dec. 2009
  Dec. 2009 - Dec. 2009
• 建設混合廃棄物からの石膏回収の可能性と選別残渣からの溶出ポテンシャル把握
  東條安匡; Alonso Montero; 松尾孝之; 松藤敏彦
  「廃石こうボード」リサイクル シンポジウム, 26 Oct. 2009
  26 Oct. 2009 - 26 Oct. 2009
• 埋立処分される廃棄物中の多環芳香族炭化水素 (PAHs) に関する研究
  佐藤昌宏; 東條安匡; 松尾孝之; 松藤敏彦
  第20回廃棄物資源循環学会研究発表会, 17 Sep. 2009
  17 Sep. 2009 - 17 Sep. 2009
• Comparison of leaching characteristics of sulfate and TOC from shredded residue of mixed C&D waste and some recycled materials
  Jose Alonso Montero Alfaro; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto; Masato Yamada
  Proceedings of the 20th Annual Conference of Japan Society of Material Cycles and Waste Management, 17 Sep. 2009
  17 Sep. 2009 - 17 Sep. 2009
• Study on the long-term carbon balance in an industrial solid waste landfill
  Hee Jong Kim; Toshihiko Matsuto; Yasumasa Tojo
  Proc. Of the 20th Annual Conference of Japan Society of Material Cycles and Waste Management, 17 Sep. 2009
  17 Sep. 2009 - 17 Sep. 2009
• 建設混合廃棄物破砕選別施設の物質フローに果たす役割と残渣品位の向上
  東條安匡
  第17回衛生工学シンポジウム論文集, 29 Jun. 2009
  29 Jun. 2009 - 29 Jun. 2009
• Investigation on material separation of mixed construction and demolition waste by sorting process
  A. Montero; Y. Tojo; T. Matsuo; T. Matsuto; M. Yamada; H. Asakura; Y. Ono
  Proceedings of the Second International Conference on Environmental Management, Engineering, Planning and Economics (CEMEPE 09), 2009
  2009 - 2009
• 都市ごみ焼却施設における高温・低温二段階集じんによる塩類と重金属類の分離捕集に関する研究
  西本薫; 岡田敬志; 東條安匡; 松藤敏彦; 松尾孝之; 鮫島良二
  第19回廃棄物学会研究発表会講演集, 19 Nov. 2008
  19 Nov. 2008 - 19 Nov. 2008
• Gypsum distribution in mixed C&D waste sorting process and its state of existence in residue
  Alonso Montero; Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto; Hiroshi Asakura; Masato Yamada; Yusaku Ono
  Proceedings of the 19th Annual Conference of THe Japan Society of Waste Management Experts, 19 Nov. 2008
  19 Nov. 2008 - 19 Nov. 2008
• 都市ごみ焼却施設における高温・低温二段階集じんによる塩類と重金属類の分離捕集に関する研究
  西本薫; 岡田敬志; 東條安匡; 松藤敏彦; 松尾孝之; 鮫島良二; 稲野浩行
  第16回衛生工学シンポジウム, 13 Nov. 2008
  13 Nov. 2008 - 13 Nov. 2008
• 重金属濃度の異なるごみ溶融飛灰のXPSによる化学状態分析
  稲野浩行; 板橋孝至; 岡田敬志; 東條安匡
  第16回衛生工学シンポジウム, 13 Nov. 2008
  13 Nov. 2008 - 13 Nov. 2008
• Basic study on wood waste degradation by white rot fungi and synthesis of humic substance
  Junpei Kawata; Yasumasa Tojo; Toshihiko Matsuto
  The 12th Korea-Japan Joint International Session, Proceedings of the 2008 Spring Conference of the Korea Society of Waste Management, May 2008
  May 2008 - May 2008
• Separation of salt and heavy metals by two-stage particulate collection in municipal solid waste incinerators
  Kaoru Nishimoto; Takashi Okada; Yasumasa Tojo; Toshihiko Matsuto; Takayuki Matsuo
  The 12th Korea-Japan Joint International Session, Proceedings of the 2008 Spring Conference of the Korea Society of Waste Management, May 2008
  May 2008 - May 2008
• X線光電子分光分析法、遂次抽出法による溶融飛灰中Pbの化合物形態分析
  岡田敬志; 東條安匡; 稲野浩行; 板橋孝至
  平成19年度土木学会北海道支部年次技術研究発表会, Feb. 2008
  Feb. 2008 - Feb. 2008
• 産業廃棄物フローのデータベース化と制御方法の検討 (社会システムとして持続可能な最終処分:高規格最終処分とは)
  山田 正人; 東條 安匡; 朝倉 宏
  廃棄物学会研究討論会講演論文集, 2008, Japanese
  2008 - 2008
• ごみ溶融飛灰のXPSによる化学状態分析
  稲野浩行; 板橋孝至; 岡田敬志; 東條安匡
  化学系学協会北海道支部2008年冬季研究発表会, Jan. 2008
  Jan. 2008 - Jan. 2008
• ガス抜き管内貯留水の水質による安定化モニタリングの可能性
  佐藤昌宏; 東條安匡; 松尾孝之; 松藤敏彦
  第18回廃棄物学会研究発表会講演集, 19 Nov. 2007
  19 Nov. 2007 - 19 Nov. 2007
• 埋め立て後長期間を経過した廃棄物の生物分解性を把握する手法に関する基礎的研究
  東條安匡; Pueboobpaphan Suthatip; 松尾孝之; 松藤敏彦
  第18回廃棄物学会研究発表会講演集, 19 Nov. 2007
  19 Nov. 2007 - 19 Nov. 2007
• 再生製品からの重金属溶出に環境因子が与える得る影響の把握
  水林晋哉; 東條安匡; 松藤敏彦; 肴倉宏史; 大迫政浩
  第18回廃棄物学会研究発表会講演集, 19 Nov. 2007
  19 Nov. 2007 - 19 Nov. 2007
• 高温集塵を採用した二段階捕集における焼却排ガス中重金属と塩類の分離
  牧志諒; 東條安匡; 岡田敬志; 松尾孝之; 松藤敏彦; 角田芳忠; 鮫島良二; 渡辺 純
  第15回衛生工学シンポジウム, 08 Nov. 2007
  08 Nov. 2007 - 08 Nov. 2007
• Study on moisture storage and movement in a municipal solid waste landfill under works for promoting stabilization
  Masahiro Sato; Toshihiko Matsuto; Yasumasa Tojo; Takayuki Matsuo
  The 2007 Environmental Societies Joint Conference, The 11th Korea-Japan Joint International Session, May 2007
  May 2007 - May 2007
• Study on production of humic substances in the process of biodegradation of organic matters
  Ai Shinbori; Yasumasa Tojo; Toshihiko Matsuto
  The 2007 Environmental Societies Joint Conference, The 11th Korea-Japan Joint International Session, May 2007
  May 2007 - May 2007
• Case analysis on generation and management of solid waste generated by natural disaster
  Yasumasa Tojo; Yuko Inoue; Toshihiko Matsuto
  The 2007 Environmental Societies Joint Conference, The 11th Korea-Japan Joint International Session, May 2007
  May 2007 - May 2007
• 建設系リサイクル製品を対象とした環境安全性評価試験のシステム規格化研究
  肴倉宏史; 大迫政浩; 遠藤和人; 貴田晶子; 宮脇健太郎; 坂本広美; 東條安匡; 崎田省吾; 田野崎隆雄; 酒井伸一
  全国環境研協議会廃棄物研究発表会, 2007
  2007 - 2007
• 産業廃棄物適正処理のための物質収支モデルの作成
  浜田雄平; 東條安匡; 松尾孝之; 松藤敏彦; 角田芳忠
  第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
  20 Nov. 2006 - 20 Nov. 2006
• 埋立地由来の健康リスク評価モデルの作成
  花田茂久; 松藤敏彦; 東條安匡
  第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
  20 Nov. 2006 - 20 Nov. 2006
• 金属回収のための溶融炉運転条件による重金属揮発挙動に関する研究
  冨川博貴; 岡田敬志; 東條安匡; 松藤敏彦; 角田芳忠; 倉田昌明; 鮫島良二
  第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
  20 Nov. 2006 - 20 Nov. 2006
• 溶融飛灰中の塩素除去法に関する研究
  岡田敬志; 牧志涼; 東條安匡; 松藤敏彦
  第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
  20 Nov. 2006 - 20 Nov. 2006
• 建設資材として利用される再生製品の溶出挙動予測モデルの作成
  東條安匡; 松藤敏彦; 大迫政浩; 肴倉宏史
  第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
  20 Nov. 2006 - 20 Nov. 2006
• 再生製品を対象とした環境安全性評価試験の規格化研究（第１法）
  肴倉宏史; 大迫政浩; 宮脇健太郎; 崎田省吾; 東條安匡; 坂本広美; 遠藤和人; 田野崎隆雄; 貴田晶子; 酒井伸一
  第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
  20 Nov. 2006 - 20 Nov. 2006
• Effect of operational condition on the behavior of metals in melting furnace
  Takashi Okada; Hiroki Tomikawa; Yasumasa Tojo; Toshihiko Matsuto; Yoshitada Kakuta; Masaaki Kurata; Ryoji Samejima
  4th International Conference on Combustion, Incineration/Pyrolysis and Emission Control, 26 Sep. 2006
  26 Sep. 2006 - 26 Sep. 2006
• Basic study on spontaneous ignition characteristics driven by low temperature oxidation in waste fuel storage
  Yoshitada Kakuta; Toshihiko Matsuto; Yasumasa Tojo; Takayuki Matsuo
  4th International Conference on Combustion, Incineration/Pyrolysis and Emission Control, 26 Sep. 2006
  26 Sep. 2006 - 26 Sep. 2006
• Study on promotion of waste plastic recycling based on material flow analysis
  Yoshitada Kakuta; Toshihiko Matsuto; Yasumasa Tojo; S.Ohnuma
  2nd International Conference on Environmental Science and Technology, 19 Aug. 2006
  19 Aug. 2006 - 19 Aug. 2006
• Investigation on characteristic of waste and leachate in semi-aerobic landfill under closure operation
  Yasumasa Tojo; Toshihiko Matsuo; Takayuki Matsuto
  Proc. of the 4th Intercontinental Landfill Research Symposium, 14 Jun. 2006
  14 Jun. 2006 - 14 Jun. 2006
• Effect of operational condition on the behavior of heavy metals in melting furnace
  Takashi Okada; Hiroki Tomikawa; Yasumasa Tojo; Toshihiko Matsuo; Takayuki Matsuto
  The 2006 Spring Conference of the Korea Society of Waste Management, May 2006
  May 2006 - May 2006
• 安全安心な廃棄物処理を目指して−田中信壽先生が残した足跡−(企画セッション１）埋立地内の水分移動と長期モデリング
  東條安匡
  第１３回衛生工学シンポジウム, 17 Nov. 2005
  17 Nov. 2005 - 17 Nov. 2005
• 溶融飛灰中重金属の連続抽出による形態分析に関する研究
  岡田敬志; 鈴木賢; 東條安匡; 松藤敏彦
  第１３回衛生工学シンポジウム, 17 Nov. 2005
  17 Nov. 2005 - 17 Nov. 2005
• 『平成16年度廃棄物学会奨励賞』廃棄物層内における水分移動現象とその制御法に関する研究
  東條安匡
  第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
  31 Oct. 2005 - 31 Oct. 2005
• 溶融飛灰からの金属回収に関する研究−溶融飛灰性状と水洗処理による山元還元の可能性−
  岡田敬志; 東條安匡; 松藤敏彦
  第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
  31 Oct. 2005 - 31 Oct. 2005
• 埋立地からの浸出水漏水・溢流量推定モデルの作成
  花田茂久; 東條安匡; 松藤敏彦
  第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
  31 Oct. 2005 - 31 Oct. 2005
• 産業廃棄物の埋立物に関する特性の調査と分類法の検討
  東條安匡; 牧志諒; 松藤敏彦; 松尾孝之; 角田芳忠
  第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
  31 Oct. 2005 - 31 Oct. 2005
• 産業廃棄物埋立処分場搬入物の調査と埋立負荷の将来予測に関する研究
  筑紫康男; 東條安匡; 松藤敏彦
  第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
  31 Oct. 2005 - 31 Oct. 2005
• Ideal Feature of Landfill in Recycle Oriented Society - Japan's Strategy
  Yasumasa Tojo
  WORKSHOP "LANDFILL MANAGEMENT IN SYRIA", 19 Sep. 2005
  19 Sep. 2005 - 19 Sep. 2005
• Forecasting long-term waste stabilization Process through the use of landfill simulator
  Yasumasa Tojo
  NATIONAL SEMINAR ON UNIVERSITIES ENVIRONMENTAL ENGINEERING RESEARCH RESULTS (Bandung, Indonesia), 01 Aug. 2005
  01 Aug. 2005 - 01 Aug. 2005
• Characterization of organics and heavy metals in industrial waste in final disposal site
  Ryo Makishi; Yasumasa Tojo; Takayuki Matsuto; Toshihiko Matsuto; Nobutoshi Tanaka
  The 2005 Spring Conference of the Korea Society of Waste Management, Korea, 12 May 2005
  12 May 2005 - 12 May 2005
• Effect of waste paper addition in thermophilic and dry methane fermentation of food waste
  Moon Chung-Man; Yasumasa Tojo; Takayuki Matsuto; Nobutoshi Tanaka; Toshihiko Matsuto
  The 2005 Spring Conference of the Korea Society of Waste Management, 12 May 2005
  12 May 2005 - 12 May 2005
• Improvement of char in quality by chlorine removal and ash separation
  In-Hee Hwnag; Toshihiko Matsuto; Nobutoshi; Yasumasa Tojo
  The 2005 Spring Conference of the Korea Society of Waste Management, 12 May 2005
  12 May 2005 - 12 May 2005
• Assessment of short-term and long-term gas generation potential of solid waste
  Suthatip Pueboobpaphan; Yasumasa Tojo; Toshihiko Matsuto
  The 2005 Spring Conference of the Korea Society of Waste Management, May 2005
  May 2005 - May 2005
• 都市ごみ埋立処分における量の大幅削減と質の適正化戦略に関する研究
  東條安匡
  平成16年度廃棄物対策研究推進事業，第4回廃棄物対策研究発表会成果発表抄録集, 08 Dec. 2004
  08 Dec. 2004 - 08 Dec. 2004
• Investigation on Organic Load and Heavy Metal Content in Landfilled Waste
  Yasumasa Tojo; Yuhei HAMADA; Toshihiko MATSUTO; Takayuki MATSUO; Yoshitada KAKUTA; Nobutoshi TANAKA
  The 3rd Intercontinental Landfill Research Symposium, 29 Nov. 2004
  29 Nov. 2004 - 29 Nov. 2004
• Numerical modeling of long-term behavior of waste in landfill
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO; Masahiko OSAKO
  The 3rd Intercontinental Landfill Research Symposium, 29 Nov. 2004
  29 Nov. 2004 - 29 Nov. 2004
• 厨芥単独処理の高温・高固形物濃度メタン発酵の運転条件に関する検討
  石原和真; 東條安匡; 田中信壽; 松藤敏彦; 松尾孝之
  第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
  17 Nov. 2004 - 17 Nov. 2004
• 炭化処理による産業廃棄物の資源化と埋立前処理の可能性
  佐々木通充; 松藤敏彦; 東條安匡; 角田芳忠; 松尾孝之; 田中信壽
  第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
  17 Nov. 2004 - 17 Nov. 2004
• 溶融飛灰からの金属回収に関する研究−化学的金属回収法の評価・比較
  岡田敬志; 東條安匡; 田中信壽; 松藤敏彦
  第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
  17 Nov. 2004 - 17 Nov. 2004
• 各種焼却飛灰のカーボン特性とDXN加熱処理特性
  角田芳忠; 松藤敏彦; 田中信壽; 東條安匡; 松尾孝之; 富川博貴; 増田孝弘
  第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
  17 Nov. 2004 - 17 Nov. 2004
• 一般廃棄物最終処分場における搬入物の有機物・金属負荷の実態調査
  東條安匡; 爛田雄平; 田中信壽; 松藤敏彦; 松尾孝之; 角田芳忠
  第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
  17 Nov. 2004 - 17 Nov. 2004
• 埋立物の土壌還元を目指す−焼却残渣の土壌化と長期挙動
  大迫政浩; 田中信壽; 東條安匡
  廃棄物学会研究討論会講演論文集, 27 May 2004
  27 May 2004 - 27 May 2004
• Effect of parts recovery from End-of-Life Vehicle on the characteristics of Automobile Shredder Residue
  Nobuyuki NAKAMURA; Toshihiko MATSUTO; Yoshitada KAKUTA; Yasumasa Tojo; Takayuki MATSUO; Nobutoshi TANAKA
  The 2004 Spring Conference of the Korea Society of Waste Management, 19 May 2004
  19 May 2004 - 19 May 2004
• Determination of organics and heavy metal contents in waste disposed of in MSW Landfill
  Yuhei HAMADA; Yasumasa Tojo; Toshihiko MATSUTO; Takayuki MATSUO; Yoshitada KAKUTA; Nobutoshi TANAKA
  The 2004 Spring Conference of the Korea Society of Waste Management, 19 May 2004
  19 May 2004 - 19 May 2004
• Water Movement in Waste Landfill and its control
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO; Takayuki MATSUO
  COE International Seminar Proceedings, Water/Waste Metabolism and Groundwater pollution, 19 May 2004
  19 May 2004 - 19 May 2004
• 都市ごみ溶融飛灰の水洗処理による金属濃縮に関する研究
  津山陽祐; 東條安匡; 田中信壽
  第14回廃棄物学会研究発表会講演論文集, 22 Oct. 2003
  22 Oct. 2003 - 22 Oct. 2003
• 廃棄物埋立地内の超長期的物質挙動予測モデルの開発
  東條安匡; 田中信壽; 大迫政浩
  第14回廃棄物学会研究発表会講演論文集, 22 Oct. 2003
  22 Oct. 2003 - 22 Oct. 2003
• Study on Collection and Disposal Method of Incombustible Waste in Japan
  Takuya Ohno; Yasumasa Tojo; Toshihiko Matsuto; Takayuki Matsuo; Nobutoshi Tanaka; Yoshitada Kakuta
  The 2003 Spring Conference of the Kore a Society of Waste Management, May 2003
  May 2003 - May 2003
• 埋立地浸出水水平排水材(ジオシンセティックス)の通水性能に関する研究
  廣川有司; 田中信壽; 東條安匡
  第13回廃棄物学会研究発表会講演論文集, 28 Nov. 2002
  28 Nov. 2002 - 28 Nov. 2002
• Lateral drainage promotion at waste and intermediate cover boundary
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO; Takayuki MATSUO
  Proceedings of the 2002 spring conference of the Korea Society of waste Man agement, May 2002, English
  May 2002 - May 2002
• Unsaturated Hydraulic Characteristic of Various Residues from Intermediate Waste Treatment Process
  Yasumasa Tojo; Nobutoshi TANAKA; Toshihiko MATSUTO; Takayuki MATSUO
  Proceedings of SARDINIA 2001 Eighth International Waste Management and Landfill Symposium, 2001, English, Oral presentation
  2001 - 2001
• 埋立地内水分移動シミュレーションによる埋立構造と底部負荷水圧の関係
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之
  第８回衛生工学シンポジウム論文集, 16 Nov. 2000
  16 Nov. 2000 - 16 Nov. 2000
• 廃棄物・覆土互層構造での水分移動に関する実験的研究
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之; 古林祐正
  土木学会第55回年次学術講演会講演概要集, 21 Sep. 2000
  21 Sep. 2000 - 21 Sep. 2000
• 廃棄物の最終処分法，地域セミナー環境〜循環型社会を目指して
  東條安匡
  北海道土木技術会コンクリート研究委員会, 2000
  2000 - 2000
• キャピラリーバリアを利用した廃棄物処分場排水システムの開発
  東條安匡; 松藤敏彦; 田中信壽; 松尾孝之; 相楽光宏
  第７回衛生工学シンポジウム, 11 Nov. 1999
  11 Nov. 1999 - 11 Nov. 1999
• ごみ埋立地表面流の生成機構とその排除に関する研究
  毛利慎也; 東條安匡; 田中信寿
  廃棄物学会第10回研究発表会, 26 Oct. 1999
  26 Oct. 1999 - 26 Oct. 1999
• 各種廃棄物充填層の水分特性値の把握
  寺沢孝; 東條安匡; 田中信寿; 松藤敏彦; 松尾孝之
  廃棄物学会第10回研究発表会, 26 Oct. 1999
  26 Oct. 1999 - 26 Oct. 1999
• 廃棄物処分場底部の水分移動制御に関する研究
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之; 相楽光宏
  第54回土木学会年次学術講演会（第?部）, Sep. 1999
  Sep. 1999 - Sep. 1999
• 多層型底部集排水構造の排水効果に与える影響因子に関する実験的研究
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之; 菅原 淳
  廃棄物学会第９回研究発表会講演論文集, 27 Oct. 1998
  27 Oct. 1998 - 27 Oct. 1998
• 最終処分場浸出水のアンケート調査に基づくマクロ水分収支モデルの検討
  東條安匡; 田中信寿; 川口知司; 松藤敏彦; 松尾孝之
  土木学会第53回年次学術講演会講演論文集, 10 Oct. 1998
  10 Oct. 1998 - 10 Oct. 1998
• キャピラリーバリアを利用した廃棄物処分場底部浸出水集排水構造に関する基礎的研究
  河野孝志; 田中信寿; 東條安匡
  廃棄物学会第８回研究発表会講演論文集, 28 Oct. 1997
  28 Oct. 1997 - 28 Oct. 1997
• 焼却灰充填層の２次元不飽和水分移動とそのモデル化
  東條安匡; 松藤敏彦; 田中信寿; 松尾孝之; 森田祥子
  廃棄物学会第８回研究発表会講演論文集, 28 Oct. 1997
  28 Oct. 1997 - 28 Oct. 1997
• 最終処分場の廃棄物層における浸透能の原位置測定
  東條安匡; 松尾孝之; 田中信寿; 松藤敏彦; 毛利慎也
  土木学会第５２回年次学術講演会講演論文集, 10 Sep. 1997
  10 Sep. 1997 - 10 Sep. 1997
• Heavy Metal Concentrations in Peripheral Soil of MSW Landfill Site
  Yasumasa Tojo; Takayuki Matsuo; Toshihiko Matsuto
  第１回韓・日廃棄物学会共同学術発表会, May 1997
  May 1997 - May 1997
• 北海道大学工学部における物質収支とゴミ収集作業の現状
  田中信寿; 松藤敏彦; 東條安匡
  廃棄物学会第７回研究発表会講演論文集, 07 Oct. 1996
  07 Oct. 1996 - 07 Oct. 1996
• 焼却灰飛散による最終処分場周辺の重金属分布（第２報）
  松尾孝之; 東條安匡; 田中信寿他
  土木学会第５１回年次学術講演会講演論文集, 17 Sep. 1996
  17 Sep. 1996 - 17 Sep. 1996
• 焼却灰層内における含水率と不飽和移動水分の関係
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之; 三井奈保子
  土木学会第５１回年次学術講演会講演論文集, 17 Sep. 1996
  17 Sep. 1996 - 17 Sep. 1996
• 北海道における地震災害と廃棄物対策
  東條安匡
  廃棄物学会災害廃棄物フォーラム講演論文集, 25 Apr. 1996
  25 Apr. 1996 - 25 Apr. 1996
• 北海道大学工学部におけるゴミの発生・資源化の把握及び意識調査
  田中信寿; 松藤敏彦; 東條安匡
  廃棄物学会第６回研究発表会講演論文集, 16 Oct. 1995
  16 Oct. 1995 - 16 Oct. 1995
• 焼却灰の不飽和水分特性と不飽和透水係数の測定
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之; 前崎 巧
  土木学会第５０回年次学術講演会講演論文集, 19 Sep. 1995
  19 Sep. 1995 - 19 Sep. 1995
• 家庭系ゴミからの資源リサイクルに関する考察
  田中信寿; 松藤敏彦; 東條安匡
  第４回化学工学・粉体工学北海道研究交流会発表要旨, 1995
  1995 - 1995
• 焼却灰充填層における２次元不飽和浸透の実験的研究
  東條安匡; 酒井 勲; 田中信寿; 松藤敏彦; 松尾孝之
  廃棄物学会第５回研究発表会講演論文集, 07 Nov. 1994
  07 Nov. 1994 - 07 Nov. 1994
• 焼却灰飛散による最終処分場周辺の重金属分布
  東條安匡; 肴倉宏史; 田中信寿; 松藤敏彦; 松尾孝之
  土木学会第49回年次学術講演会講演概要集, 15 Sep. 1994
  15 Sep. 1994 - 15 Sep. 1994
• 廃棄物充填層の２次元不飽和浸透に関する研究
  東條安匡; 田中信寿; 松藤敏彦; 松尾孝之
  廃棄物学会第４回研究発表会講演論文集, 13 Oct. 1993
  13 Oct. 1993 - 13 Oct. 1993
• 札幌市における家庭系ごみ流れについて−発生・排出・収集原単位の推定とその影響要因−
  東條安匡; 田中信寿; 松藤敏彦
  第１回化学工学・粉体工学北海道研究交流会発表要旨, 1992
  1992 - 1992
• 家庭系ごみ排出原単位の推定
  松藤敏彦; 田中信壽; 東條安匡
  衛生工学研究討論会講演集, 1992
  1992 - 1992
• 廃棄物管理エキスパートシステムの知識ベース構築に関する基礎的研究
  東條安匡; 田中信寿; 松藤敏彦
  廃棄物学会第２回研究発表会講演論文集, 28 Oct. 1991
  28 Oct. 1991 - 28 Oct. 1991
• 繊維等を混入した小型模型盛土の降雨による崩壊実験
  川名泰之; 中村実和子; 東條安匡; 飯竹重夫; 金井太一
  土木学会第16回関東支部技術研究発表会, 1988
  1988 - 1988

• 大学院共通授業科目（一般科目）：複合領域, 2024年, 修士課程, 大学院共通科目
• 廃棄物埋立処分工学特論, 2024年, 修士課程, 工学院
• 廃棄物埋立処分工学特論, 2024年, 修士課程, 工学院
• 北極域総論, 2024年, 修士課程, 環境科学院
• 廃棄物埋立処分工学特論, 2024年, 博士後期課程, 工学院
• 廃棄物埋立処分工学特論, 2024年, 博士後期課程, 工学院
• 環境工学, 2024年, 学士課程, 工学部
• 設計製図, 2024年, 学士課程, 工学部
• 環境統計学, 2024年, 学士課程, 工学部
• 環境モデリング, 2024年, 学士課程, 工学部
• 数理計算演習, 2024年, 学士課程, 工学部
• 環境工学実験Ⅱ, 2024年, 学士課程, 工学部
• 環境工学実験Ⅲ, 2024年, 学士課程, 工学部
• 廃棄物処理工学, 2024年, 学士課程, 工学部
• 環境工学概論, 2024年, 学士課程, 工学部

• A challenge for the establishment of the evaluation method of the penetration of minor harmful ions in concrete by using radio isotopes
  Grants-in-Aid for Scientific Research
  28 Jun. 2019 - 31 Mar. 2021
  Yamada Kazuo
  A separating quantification method for Cs and Sr simultaneous penetration of 10 μM in mortar based on the autoradiograph using imaging plate (IP) for radioisotopes (RI) has been developed. The separation was realized by using the energy difference between the beta-rays of Cs-137 and Sr-90. From the difference of the degree of attenuation when the samples were exposed under the shielded condition by aluminum plate of 0.1 mm were applied. For quantification, cement pastes containing RI whose concentration is known were fabricated separately as standards and those are exposed on IP simultaneously with mortar samples for evaluation and the signals from samples and standards were compared.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), National Institute for Environmental Studies, 19K21998
• アルカリ長石による焼却飛灰中重金属の溶出抑制と最終安定化物化の実現
  科学研究費補助金（基盤研究（B））
  2019 - 2021
  文部科学省, 北海道大学, Principal investigator
• Evaluation of Integrated waste management system based on MBT concept for municipal solid waste
  Grants-in-Aid for Scientific Research
  01 Apr. 2017 - 31 Mar. 2020
  Matsuto Toshihiko
  MBT is a combination of mechanical, biological, and thermal process as an integrated system. Two MBT systems were studied: combined system of Anaerobic Digestion (AD) and incineration, and Biodrying MBT which is followed by mechanical separation to recover solid fuel. Field study was conducted in real-scale facility, where solid waste and output material were sampled, and material balance and energy balance were clarified. Lab-experiment of biodrying was also carried out to construct moisture removal model. By taking two other system, incineration and RDF production system, four systems were evaluated in terms of energy recovery and CO2 emission. By using data obtained in our study and from literature review, material flow were drawn, and energy balance was estimated. Finally, sensitivity analysis of main parameters was carried out to find factors which should be improved for higher energy recovery rate.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 17H01917
• 指定廃棄物熱処理残渣中セシウムのアルミノ珪酸塩による捕捉・難溶性態化技術の確立
  環境研究総合推進費
  2018 - 2020
  環境省, 北海道大学, Principal investigator
• 焼却主灰中の難溶性態セシウムが結晶表面の非晶質相に濃集する機構の解明とその応用
  環境研究総合推進費
  2015 - 2017
  環境省, 北海道大学, Principal investigator
• 乾燥地域に位置する廃棄物埋立地の安定化シナリオの構築とその実現技術の開発
  科学研究費補助金（基盤研究（C））
  2015 - 2017
  文部科学省, 基盤研究（C）, 北海道大学, Principal investigator
• Inspection methodology of solid waste landfill for knowledge develop of landfill operators
  Grants-in-Aid for Scientific Research
  01 Apr. 2013 - 31 Mar. 2016
  Matsuto Toshihiko; TOJO Yasumasa
  The main finding of this study is the air pathway in landfill and its mechanism. By use of gas tracer test in full size landfill, air is induced from leachate collection pipe, and it moves through solid waste layer, then discharged to passive gas vent. This mechanism was well matched with natural ventilation model. Because temperature and gas velocity can be index to know the magnitude of aeration around gas vent, extensive survey was conducted to know the degree of aeration in municipal and industrial solid waste landfill. Since gas flow was detected in a landfill in which leachate is accumulated at the bottom, gas vent is primarily important to provide exit and air can be induced from peripheral gas vents instead of leachate collection pipe.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 25281035
• Identification of chemical form of cesium contained in incineration bottom ash and evaluation of its long term stability.
  Grants-in-Aid for Scientific Research
  2012 - 2013
  TOJO Yasumasa
  In this study, why cesium (Cs) contained in incineration bottom ash is hardly soluble, was investigated by focusing on its chemical form. By combusting simulated waste with stable Cs, artificially created bottom ash in which Cs content became high was created. From the observation by scanning electron microscope and polarization microscope, it was found that Cs accumulates at peripheral area of specific mineral. In its location, glassy amorphous phase formed and Cs is captured in it physically. The mineral is comprised of aluminum, silicon, and oxygen, mainly. To investigate the origin of the mineral, several inorganic and organic material was combusted with stable Cs and its ash was analyzed by the same method. However, the similar mineral was not identified. Clay mineral was too small when comparing to the mineral, which capture Cs in high concentration and was identified in artificially created ash.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 24510089
• Evaluation of risk on hydrogen sulfide formation from recycled material and fine residue containing gypsum
  Grants-in-Aid for Scientific Research
  2009 - 2011
  TOJO Yasumasa
  Possibility of hydrogen sulfide formation was investigated for construction and demolition waste sorting residue, fertilizer, soil conditioner, and recycled material containing sulfate or gypsum, assuming that they are utilized in ordinary environment. Long-term leaching behavior of sulfate from residue was almost the same with other materials. Though leached amount of organic carbon from residue was higher than from others, it was only 1% of its original content. Occurrence of sulfate reduction in residue was prevented by maintaining high pH.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 21510076
• Carbon balance, gas and moisture movement in solid waste landfills for estimating stability
  Grants-in-Aid for Scientific Research(基盤研究(B))
  2007 - 2009
  Toshihiko MATSUTO; 島岡 隆行; 吉田 英樹; Yasumasa TOJO; Takayuki SHIMAOKA; Hideki YOSHIDA
  Understanding the conditions inside the landfills is critically important in terms of the estimation of long-term aftercare period. Carbon balance, and gas and water movement in landfill was estimated in this study. The most notable finding, the fact that passive gas vents can help to aerate landfilled waste as well as collect and release LFG, will help developing new design concept of landfill in the future.
  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, 19360408
• Upgrading numerical model for expressing long-term behavior of wastein landfill
  Grants-in-Aid for Scientific Research(基盤研究(C))
  2007 - 2008
  Yasumasa TOJO
  廃棄物埋立地での物質挙動を表現する数値計算モデルに有害化学物質の挙動を組み込むために, 有機物分解に伴って生成する腐植物質の挙動を実験的に追跡した. 易分解性物では分解初期に腐植物質の僅かな生成が確認されたものの, 継続的な腐植の生成は認められなかった. また白色腐朽菌による木質分解においてはリグニン減少は起こったものの腐植の生成を確認するには至らなかった. 埋立物中のPAH含有量を実測し, 長期動態モデルに組み込んだ結果, 分配係数の大きな物質は固相に長期残存することが明らかになった.
  Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Principal investigator, Competitive research funding, 19560816
• 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
• 都市ごみ溶融飛灰中重金属の簡易抽出/高率濃縮を実現する溶融処理条件の確立
  科学研究費補助金(若手研究(B))
  2004 - 2006
  東條 安匡
  過去2年間で,実際の施設から採取した溶融飛灰中の金属濃縮法,飛灰中のPb,Znの形態分析法,溶融飛灰の金属含有量を向上させるための溶融条件の最適化に関して検討を行ってきた.本年度は,飛灰が捕集される部分に関して,高温集塵を採用して2段捕集とすることで,重金属が濃縮した飛灰と塩類を主体とした不溶化前処理不要な飛灰とに分離することを検討した.実験は,電気管状炉を用いて,飛灰を模擬した純物質からなる試料を揮発させ,その後段の500〜800℃に高温捕集部を,100℃の地点に低温捕集部を設けて飛灰の捕集を行った.まず1段捕集と2段捕集とでの捕集飛灰の品位を比較した結果,2段捕集とすることで,高温側に塩類が,低温側に重金属類が分配されることを確認した.次に高温捕集部の温度を変化させ,最も分離効率の高い設定温度域を検討した結果,高温捕集部を700℃〜800℃とすることで,Pbは90%以上が低温部で捕集され,高温部で僅かに捕集されたPbは,難水溶性であることを確認した.この結果は,低温部捕集灰は山本還元に,高温捕集灰は不溶化前処理を必要とせずに,埋立処分が可能であることを暗示するものである.次に,より多様な金属元素に対しても分離捕集の効果を検証するために,元素の揮発挙動に影響を与えるガス雰囲気,投入試料の元素組成(C,S,C1含有量)を変化させた実験を実施した.還元雰囲気とすることで,亜鉛,...
  文部科学省, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 16710042
• Heavy Metal Flow in Solid Waste Management System and Evaluation of Environmental Effect
  Grants-in-Aid for Scientific Research(基盤研究(C))
  2003 - 2004
  Toshihiko MATSUTO; 東條 安匡
  Heavy metals in goods will be dispersed to the environment if end-of-life goods (solid waste) are treated inadequately. This will eventually result in (1)high environmental risk and (2)valuable resource loss. Heavy metals should therefore be given higher priority in solid waste management system. Treatment and recycling process of solid waste is last stage in goods' life cycle and also critical stage to determine whether heavy metals are released to the environment or not. So, it is significant which process is selected for solid waste management. This study aimed to estimate heavy metal fl...
  Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 15560467
• 廃棄物の資源化適正処分プロセスの解析・定式化によるリサイクルシステム工学の展開
  科学研究費補助金(萌芽研究)
  2003 - 2004
  田中 信壽; 東條 安匡; 松藤 敏彦
  循環型社会を目指してさまざまな取り組みがなされているが、リサイクルの促進が大量消費・廃棄を大量リサイクルに変えるだけではないかとの懸念がある。廃棄物処理・資源化は製品ライフサイクルの最終段階であり、循環型社会の本来の目的である(1)環境負荷の低減、(2)天然資源の削減を、(3)適正なコストで実行できるシステムでなければならない。また部分的な適正化ではなく、(4)廃棄物の発生から資源化・処分に至るまでを安定的に運用できなければならない。本研究はこのような要求にこたえる「リサイクルシステム工学」のために実施した。廃棄物処理・資源化システムは、多様な廃棄物の発生、その分別、ごみ種ごとの処理選択肢の多さのため、非常に複雑である。本研究では、発生から最終処分までの各処理プロセスをモデル化し、(1)物質収支を定量的に記述し、(2)エネルギー収支、(3)電力、燃料等の用役投入、(4)コスト評価、(5)二酸化炭素排出量推定を行うプログラムを作成した。本プログラムは、分別方法、収集方法、分別されたごみの処理方法を任意に選択できるもので、さまざまな処理シナリオを環境影響、コストの点から評価できるものである。このプログラムを用い、資源化処理、堆肥化処理、メタン発酵、RDF製造、破砕選別処理、焼却、ガス化溶融、埋立、収集輸送の詳細な検討を行った。さらに、さまざまな処理シナリオを想定し、循環型社会にふ...
  文部科学省, 萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 15656228
• 浸出水の高塩類化が最終処分場排水システムに与える影響
  科学研究費補助金(奨励研究(A), 若手研究(B))
  2001 - 2002
  東條 安匡
  昨年度の研究の結果,ジオシンセティック排水材に浸出水を長期間通水していると,間隙が閉塞し,通水能が低下していく事を確認した.本年度は,昨年度の研究を継統し,浸出水中のスケール生成ポテンシャルが排水材の通水能に与える影響について検討した.排水材の物理的目詰まり以外の主要な閉塞要因は,CaCO_3沈殿が排水材繊維に付着堆積することと考えられたが,このCaCO_3沈殿の生成式は,(Ca^<2+>+2OH^-)+(2H^++CO_3^<2->)→CaCO_3+2H_2Oで表され,この式が平衡状態になるときのpH(飽和pH[pHS])は,pHs=pCa^<2+>+pAlK+(pK_2'-pK_s')で表される.そこで,実験には浸出水のLIの異なる5種類の試料水(A, B, C, D, E)を作成して通水実験を行い,浸出水の水質による通水能の低下について検討した.試料水は毎週作成し,水質の分析を平行して行った.試料水のLIの経日変化は,(A)埋立地浸出水原水および(B)高Ca浸出水はおよそ2で推移し,常にCaCO_3沈殿の生成域にあった.(C)高pH浸出水および(D)焼却灰浸出水も常に正の値を示しCaCO_3沈殿の生成域にあったが,(C)がおよそ4で推移したのに対し,(D)は6週目までは2〜5の範囲で変動し,7週目以降は6以上と更に大きい値を示した.一方,(E)低pH浸出水は1〜5週目で...
  文部科学省, 奨励研究(A), 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 13750519
• Experimental study on Dispersion of incineration residue at MSW Landfill
  Grants-in-Aid for Scientific Research(基盤研究(C))
  2000 - 2001
  Toshihiko MATSUTO; 東條 安匡
  In Japan dioxin has been a big environmental concern. Incineration residue contains dioxin, and pose an environmental risk when dumped in a landfill. In this study, the possibility of dispersion of residues was studied by using lab-scale wind chamber, with moisture content as an main variable. Bottom ash from several MSW incinerators were injected in a wind chamber to simulate dumping practice in a landfill. Moisture content was main control variable in this study, and particle size of ash samples and dispersed ash captured by air samplers in the chamber were determined.Particle size and mo...
  Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 12650541
• 効率的集排水を目的とした廃棄物処分場底部構造の開発
  科学研究費補助金(奨励研究(A))
  1997 - 1998
  東條 安匡
  廃棄物処分場からの浸出水漏洩は処分場の底部に浸出水が貯留し正の水圧が付加されることに起因する。本研究ではこの水分貯留を抑制するためにキャピラリーバリアを用いた排水構造を底部に設け,水分を迅速に排除する機構を開発した。上部層試料,下部層試料に種々の材料の組み合わせを採用し,数段階の勾配,降水量で小規模実験(幅60cm,奥行き15cm,高さ55cm),及び大規模実験(幅350cm,奥行き20cm,高さ95cm)を行い,排水効率とそれを左右する影響因子について検討した結果,バリアの効率には上部から供給される水量が最も大きな影響を与えることが明らかとなった。バリアが効率的に機能し,100%の水分を鉛直方向へ通過させることなく側方へ排除できる限界の水量は概ね100cm^3/h/cmであった。これは,例えば,距離20m程度の実規模を想定した場合,約0.5mm/h程度の水量に相当する。従って,処分場底部に到達する水量を,覆土による排除,廃棄物層内における水量変動のピークカットによって0.5m/h程度にまで低減させることができたならば,処分場底部においては,浸出水が遮水シートに到達することはなくなり,漏洩リスクは低減するものと考えられる。本研究では,さらに,バリアの排水機能を向上させるために二層境界部にジオテキスタイルを敷設した条件,及び下部引き込み深さを変化させた条件についても検討を行い,...
  文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 09750628
• Environmental Impact from Urban Activities
  Grants-in-Aid for Scientific Research(基盤研究(C))
  1997 - 1998
  Toshihiko MATSUTO; 東條 安匡
  There are many possible sources of environmental impact in a city. In this study, all kinds of activities in urban area were categorized into four groups, and energy consumption, which is one of the major index of environmental load used in LCA research, was estimated for human activities in a city of Sapporo.The four groups defined in this research are : (A) household activity, (B) industrial & commercial activity , (C) transportation, and (D)environmental pollution control facilities. Citizen's life, A, are supported by the latter three. Water treatment, sewage water treatment, and solid ...
  Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 09650596
• 焼却灰飛散による最終処分場周辺の重金属分布に関する研究
  科学研究費補助金(奨励研究(A))
  1995 - 1995
  東條 安匡
  焼却灰中の微細な粒子は乾燥することによって大気中に舞い上がり、風などで輸送されて周辺環境へ飛散することが懸念される。本研究では実際に最終処分場の周辺土壌をサンプリングし、その金属含有量を調査した。周辺土壌を採取するために選定した処分場はA(焼却灰主体埋立地、即日覆土等はなされず、長期間露天投棄)、B(不燃ごみ主体埋立地、焼却灰割合13%、サンドイッチ方式埋立、即日覆土はあるものの覆土に焼却灰が混合されている)の2処分場である。両処分場ともに平地に造成されており、直接風の影響を受けるような立地条件にある。A処分場については93年に南東側で調査が行われているので、本研究では北西側にサンプリングフィールドをとった。B処分場ではAブロックの西側に調査地点を決め、試料を採取した。試料採取地点はA処分場で70地点、B処分場で54地点である。採取した試料は炉乾燥し、2mmふるい通過分について四分法によって代表試料を得た。それを塩酸抽出法によって金属を抽出した後、原子吸光法によって分析した。なお、各代表試料について3回の分析を行っている。定量した元素は、Ca,Zn,Cu.Na,K,Fe,Mn,Mgである。焼却灰中には一般の土壌と比較してCa,Zn,Cu,Naが2桁から3桁多く含まれている。一方Fe,Mg,Mn等は土壌と比較して含有量差はほとんどない。そのことを基に土壌の金属濃度分析結果を検討...
  文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 07750631
• Developmental of Calculation Scheme for Municipal Solid Waste Management to Minimize Solid Waste Volume and Maximize Resource Recovery
  Grants-in-Aid for Scientific Research(試験研究(B))
  1994 - 1995
  Nobutoshi TANAKA; 羽原 浩史; 手島 肇; 樋口 壮太郎; 東條 安匡; 松藤 敏彦
  The object of this research is the construction of calculation scheme about mass and energy balance, cost evaluation, resource recovery and emission of hazardous materials for municipal solid waste management to minimize solide waste volume and maximize resource recovery. It must be comprehensive and be composed of all subsystems, such as waste generation, recycle, reduction, treatment and ultimate disposal.The following results are obtained.1.The calculation model for estimating the collection weight of some kind of solid wastes, such as combustible refuse, imcombustible refuse, bulky wast...
  Ministry of Education, Culture, Sports, Science and Technology, 試験研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 06555160
• 廃棄物充填層における2次元不飽和水分移動及び溶質輸送に関する研究
  科学研究費補助金(奨励研究(A))
  1994 - 1994
  東條 安匡
  幅32cm、奥行き6cm、高さ85cmの直方体で、下部を7つのコンパートメントに分割したカラムを試作し、その中に、任意の高さに焼却灰を充填した。そして、その上部中央へ線上の降水を行い、下端の各流出口からの流出水量を時間経過と共に測定した。供給した水分は、焼却灰層内を鉛直下方に移動しながら横方向へも拡散しつつ浸透し、最終的に下端より流出して、2次元的な流出分布を形成する。このようにして、焼却灰層に於ける2次元の不飽和水分移動実験を実現した。実験は、充填層厚さ、降水量、充填密度等を様々に変化させて、同様の測定を繰り返した。そして、得られたこの2次元流出分布に対し、土壌の不飽和浸透理論の適用性の検討を試みた。まず、水分特性曲線、飽和透水係数を実測し、Van Genuchtenの方法で不飽和透水係数を推定した。そして、2次元に拡張したRichardsの不飽和浸透式をコンパートメントモデルを用いて解くことで、理論上の2次元流出分布を得た。その結果と実験値を比較すると、対照実験として用いた砂の場合は、比較的良好な一致を見たが、焼却灰の場合、全く一致しなかった。焼却灰の場合、計算値は実験値に対し、横方向拡散がほとんど進行せず、また、定常に至るまでの時間が10倍以上も長くなった。このような焼却灰層の場合に理論値が実験値と一致しなくなった理由として考えられたのが、不飽和透水係数の極端な小ささで...
  文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 06750577

• 難溶環境有害金属含有粉末およびその製造方法
  Patent right, 東條安匡, 国立大学法人北海道大学
  特願2021- 11762, 28 Jan. 2021
• 飛灰の重金属類除去方法
  Patent right, 田中 信壽; 松藤 敏彦; 東條 安匡; 杉本 富男; 山本 誠; 竹内 和則, 三井造船株式会社, 国立大学法人 北海道大学
  特願2005-072610, 15 Mar. 2005
  特開2006-255501, 28 Sep. 2006
  200903034868640356