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Swelling Properties of Water-Swelling Materials Exposed to Organic Water Pollution

Journal of Environmental Science and Engineering 2011年第4期5卷 453-459页

作者： S. Inazumi M. Kobayashi T. Wakatsuki K. Shishido Department of Urban Management Kyoto University Kyoto 6158540 Japan Nihon Chemical Paints Co. Ltd. Kanagawa 2521111 Japan tomec corporation Tokyo 1050012 Japan

A water-swelling material is one of the rubbery impermeable materials which mixed synthetic resin elastomers as a base material, high absorbency polymers, filler and solvents. In this study, swelling characteristics of the water-swelling material on the water polluted with COD and BOD, as an impermeable material at coastal landfill sites, are examined by laboratory swelling ratio test. Furthermore, the factor in which it influences the swelling pressure of water-swelling material is clarified by measuring the swelling pressure. As the results, the COD nor the BOD concentrations in the soaked water influence the swelling ratio of the water-swelling material. When the thicknesses of water-swelling material are 2 mm and 3 mm, the maximum swelling pressure of 0.5 MPa or more that corresponds to hydraulic pressure by depth of 50 m is possessed.

关键词： Coastal landfill site swelling pressure swelling ratio water-swelling material

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Evaluation of Maintenance Strategies Based on Leakage Risk Assessment on Side Impervious Walls at Coastal Landfill Sites

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Materials Sciences and Applications 2017年第6期8卷 448-475页

作者： Shinya Inazumi Misato Sekitani Kwang-Seok Chae Ken-Ichi Shishido Department of Civil Engineering College of Engineering Shibaura Institute of Technology Tokyo Japan Graduate School of Global Environmental Studies Kyoto University Kyoto Japan Infra & Offshore Research Team GS Engineering & Construction Seoul Korea tomec corporation Tokyo Japan

Asset management is a strategic decision-making aspect of social infra-structure that ensures safety by predicting long-term conditions and maximizing effectiveness under budgetary constraints. Predicting the deterioration of impervious walls is essential in the asset management of coastal landfill sites, particularly in the design of their maintenance and repair strategy. In this paper, a quantitative evaluation of the leakage of toxic substances in coastal landfill sites where deterioration of side impervious walls has decreased the water interception performance is reported. In addition, risk evaluation based on the asset management of the leakage is applied to determine an appropriate repair method. The strategy of repairing the walls when the concentration of the toxic substances leaking into the sea area exceeds the closure and abandonment of coastal landfill sites is demonstrated to be superior. Moreover, the strategy of repairing only the seaside side impervious wall is shown to be cost-effective.

关键词： Coastal Landfill Site Impervious Wall Maintenance Strategy Risk Assessment

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Remediation of Heavy Metals Polluted Soil Using Metal Insolubilizing Materials

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Journal of Environmental Protection 2018年第7期9卷 770-789页

作者： Shinya Inazumi Ken-Ichi Shishido Supakij Nontananandh Kosuke Moriiwa Department of Civil Engineering College of Engineering Shibaura Institute of Technology Tokyo Japan tomec corporation Tokyo Japan Department of Civil Engineering Faculty of Engineering Kasetsart University Bangkok Thailand Division of Architecture and Civil Engineering Graduate School of Engineering and Science Shibaura Institute of Technology Tokyo Japan

Heavy metal ions, one kind of harmful substance, may exist in the soil irrelevant to artificial development, and soil contamination, due to soil and rock containing these naturally derived heavy metals, has recently become apparent. Thus, in an amendment that came into effect in 2010 of Japan, the scope of countermeasures and regulations for contaminated soil was amended to “contaminated soil derived from artificial development” and “naturally derived contaminated soil”. When naturally derived contaminated soil is encountered during the carrying out of construction work, countermeasures against this type of soil contamination are necessary. In this research, new metal-insolubilizing materials are developed in order to improve the insolubilization treatment which is one method for treating contaminated soil. Specifically, tests are conducted to clarify the insolubilization effect on heavy metals, and the insolubilization mechanism is chemically and mineralogically discussed.

关键词： Insolubilization Treatment Insolubilization Mechanism Metal-Insolubilizing Material Leaching Test Contaminated Soil

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