2022 Fiscal Year Final Research Report
Application of ISO Column Percolation Tests -Development of Contaminant Behavior Models in Actual Environments-
| Project/Area Number |
19K04606
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22030:Geotechnical engineering-related
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| Research Institution | Fukuoka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
肴倉 宏史 国立研究開発法人国立環境研究所, 資源循環・廃棄物研究センター, 室長 (70331973)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 土壌汚染 / 環境安全性評価 / 重金属 / 上向流カラム通水試験 / 地下水 / 移流分散 / 液固比バッチ試験 / 溶出挙動 |
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| Outline of Final Research Achievements |
In order to utilize up-flow column percolation test as a method for evaluating the environmental impact of contaminated soil, the current status and issues of column tests were summarized, and experimental studies were conducted to resolve the issues. Specifically, this study was examined the range of influence of flow rate, the influence of handling of lumpy samples and crushed particle size on the test results, and the influence of different sample filling densities in the column on the test results and its range of application.
In addition, a new advection-dispersion analysis method using parameters obtained from liquid-solid ratio batch tests and an elution behavior model that takes internal diffusion into account were proposed to construct a model that can reproduce elution behavior of contaminants under actual environmental conditions. As a result, it was revealed that the proposed method can shorten the test time of column tests and predict the elution behavior of contaminants.
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| Free Research Field |
地盤環境工学
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| Academic Significance and Societal Importance of the Research Achievements |
土壌汚染の判定や対策費用の負担など種々の問題が顕在化しているため、環境安全性の評価を適切に行うことが求められる社会的背景の中、上向流カラム通水試験は、これらの打開策の1つのツールとなり得ることを実験的に明らかとした。さらに、実現象を考慮した新たな解析モデルの提案は、試験時間の短縮化や溶出挙動を簡易的に予測できる点において学術的意義は大きいと考えられる。また、上向流カラム通水試験は、土壌汚染の判定のみならず、種々のリサイクル材料を地盤材料として有効利用した際の環境影響評価手法にも適用できることから、循環型社会形成の構築を目指した新しい研究分野への波及効果にも十分な期待が持てる。
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