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j.sandf.2021.05.004.pdf | 1.83 MB | Adobe PDF | 見る/開く |
タイトル: | Sorption-desorption column tests to evaluate the attenuation layer using soil amended with a stabilising agent |
著者: | Kato, Tomohiro https://orcid.org/0000-0003-3322-4791 (unconfirmed) Gathuka, W., Lincoln Okada, Takaomi Takai, Atsushi https://orcid.org/0000-0003-3063-471X (unconfirmed) Katsumi, Takeshi https://orcid.org/0000-0003-1936-275X (unconfirmed) Imoto, Yukari Morimoto, Kazuya Nishikata, Miu Yasutaka, Tetsuo |
著者名の別形: | 加藤, 智大 岡田, 雄臣 高井, 敦史 勝見, 武 |
キーワード: | Fluoride Geogenic contamination Magnesium oxide Partition coefficient Advection-dispersion analysis |
発行日: | Aug-2021 |
出版者: | Elsevier BV |
誌名: | Soils and Foundations |
巻: | 61 |
号: | 4 |
開始ページ: | 1112 |
終了ページ: | 1122 |
抄録: | Sorption-desorption column tests using acrylic columns (ϕ 5 cm × h 10 cm) were employed to evaluate the sorption performance of an attenuation layer against geogenic contamination. The attenuation layer material was silica sand amended with 1, 5, or 10% of a stabilising agent. The main component of the agent was magnesium oxide. The sorption behaviour of the materials was determined by a fluoride solution (C₀ = 80 mg/L F-), while the desorption behaviour was determined by distilled water. Breakthroughs (C/C₀ > 0.05) occurred after approximately 1, 20, and 50 PVF for stabilising agent contents of 1, 5, and 10%, respectively. The one-dimensional advection-dispersion equation modelled the breakthrough curves obtained from the tests. The predictions gave unrealistic estimates, especially for the breakthrough point where C/C₀ = 0.05. For the 1% agent content, approximately 20% of the sorbed mass, Ss, was desorbed, but the percentage of desorbed mass, Sd, was much smaller for the higher agent contents. The difference between the sorbed and desorbed masses was defined as the immobilised fraction, Ss - Sd. For the 5% agent content, Ss - Sd = 4.0 mg/g. The results suggest that when silica sand is amended with magnesium oxide as an agent, the mixture can immobilise the fluoride in the attenuation layer. |
著作権等: | © 2021 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY-NC-ND license |
URI: | http://hdl.handle.net/2433/276206 |
DOI(出版社版): | 10.1016/j.sandf.2021.05.004 |
出現コレクション: | 学術雑誌掲載論文等 |
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