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Model test of in-situ remediation for heavy metal-contaminated clayey soil by artificial freezing and shaft washing

文献类型：期刊论文

作者Zhang, Jun2,3,4; Nie, Wenjun3; Kim, Mintae1; He, Xianghong3; Rui, Dahu3; Pan, Weidong5
刊名COLD REGIONS SCIENCE AND TECHNOLOGY
出版日期2024-12-01
卷号228页码:11
关键词Artificial freezing Plastic drainage plate Clayey soil Soil washing Heavy metal Vacuum pump
ISSN号0165-232X
DOI10.1016/j.coldregions.2024.104330
英文摘要The low permeability of clayey soil and the pressure of liquid extraction and injection tend to form preferential flow paths in the soil, diminishing the remediation efficiency of shaft washing. Therefore, a new in-situ repair method combining artificial freezing and shaft washing is proposed. Using Pb and Cd contaminated clayey soil as the research object, in-situ model tests of different eluent types, concentrations, and suction modes were conducted to investigate the removal rate of heavy metals and the distribution of temperature and water field. The results demonstrated that the artificial freezing method can effectively induce the water (eluent) migration from the unfrozen zone to the freezing front. Besides, it effectively resolved the issue of poor washing efficiency caused by preferential flow between the extraction and injection wells during the extraction process. After five freezethaw cycles, the removal rate of Pb and Cd reached 46.16 % and 59.04 %, respectively. The combination of artificial freezing and plastic drainage plate technology merges artificial freezing and shaft washing methods to achieve the remediation of heavy metal-contaminated soil, providing a reference for the in-situ remediation of heavy metal-contaminated clayey soil.
资助项目Key Scien-tific and Technological Project of Henan Province[222102320226] ; Basic Research Expenses of Henan Polytechnic University[NSFRF230424] ; Natural Science Foundation of Henan Province[242300421650] ; National Natural Science Foundation of China[U2004181] ; National Natural Science Foundation of China[41371092]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:001324830600001
出版者ELSEVIER
源URL[http://119.78.100.198/handle/2S6PX9GI/42692]  
专题中科院武汉岩土力学所
通讯作者Kim, Mintae
作者单位1.Korea Univ, Res Prof Sch Civil Environm & Architectural Engn, 145 Anam Ro, Seoul 02841, South Korea
2.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430064, Peoples R China
3.Henan Polytech Univ, Int Joint Res Lab Henan Prov Underground Space Dev, Jiaozuo 454003, Peoples R China
4.Henan Acad Geol, Zhengzhou 450016, Peoples R China
5.Zhengzhou Metro Grp Ltd Co, Zhengzhou 450000, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Jun,Nie, Wenjun,Kim, Mintae,et al. Model test of in-situ remediation for heavy metal-contaminated clayey soil by artificial freezing and shaft washing[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2024,228:11.
APA Zhang, Jun,Nie, Wenjun,Kim, Mintae,He, Xianghong,Rui, Dahu,&Pan, Weidong.(2024).Model test of in-situ remediation for heavy metal-contaminated clayey soil by artificial freezing and shaft washing.COLD REGIONS SCIENCE AND TECHNOLOGY,228,11.
MLA Zhang, Jun,et al."Model test of in-situ remediation for heavy metal-contaminated clayey soil by artificial freezing and shaft washing".COLD REGIONS SCIENCE AND TECHNOLOGY 228(2024):11.

入库方式： OAI收割

来源：武汉岩土力学研究所

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