Insight into migration of Cr(VI) in self-hardening slurry materials for trench cutoff wall
文献类型：期刊论文
| 作者 | Huang, Xiao2,4,5; Zhang, Jinfang2,4,5; Jiang, Wenhao1,3 |
| 刊名 | ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2025-03-15 |
| 卷号 | 269页码:13 |
| 关键词 | Adsorption property Free-diffusion behavior Self-hardening slurry Cr(VI) Migration |
| ISSN号 | 0013-9351 |
| DOI | 10.1016/j.envres.2025.120876 |
| 英文摘要 | The migration and immobilization of heavy metals in soil and groundwater pose significant environmental challenges, particularly in the context of Cr(VI), a highly toxic and mobile contaminant. Self-hardening slurry materials, commonly used for trench cutoff walls, have gained great attention due to their potential for pollutant containment. However, the relationship between their adsorption properties and pollutant diffusion behaviors remains poorly understood. This study investigates the adsorption properties and free-diffusion behaviors of Cr (VI) in two self-hardening slurry materials, SCB (slag-cement-bentonite) and MASB (MgO activated slagbentonite), to better understand the pollutant migration and immobilization mechanisms. Adsorption experiments reveal that MASB exhibits a higher Cr(VI) adsorption capacity than SCB, resulting in greater retardation factors and longer breakthrough times, improved by 57.6% and 94.9% at Cr(VI) concentrations of 2600 mg/L and 26000 mg/L, respectively. However, free-diffusion tests show that MASB has a larger migration depth and shorter breakthrough times, reduced by 68.2% and 57.9%. Microscopic analysis reveals that the presence of stable and ion-exchangeable hydration products (hydrotalcite-like phases) in MASB enhances its Cr(VI) adsorption capacity but provides favorable conditions for Cr(VI) diffusion. SCB demonstrates superior retardation to Cr(VI) in free-diffusion due to the transformation of AFm phases absorbed with Cr(VI) into stable AFt phases. |
| 资助项目 | National Natural Science Foundation of China[52370156] ; National Natural Science Foundation of China[42007260] ; Guangxi Science and Technology Major Project[AA23073018] ; Guangxi Science and Technology Major Project[AD24010062] |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| WOS记录号 | WOS:001405706400001 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37457]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jiang, Wenhao |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Guangxi Univ, Educ Dept Guangxi Zhuang Autonomous Reg, Key Lab Environm Protect, Nanning 530004, Guangxi, Peoples R China 3.Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China 4.Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China 5.Guangxi Univ, State Key Lab Featured Met Mat & Life Cycle Safety, Nanning 530004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Xiao,Zhang, Jinfang,Jiang, Wenhao. Insight into migration of Cr(VI) in self-hardening slurry materials for trench cutoff wall[J]. ENVIRONMENTAL RESEARCH,2025,269:13. |
| APA | Huang, Xiao,Zhang, Jinfang,&Jiang, Wenhao.(2025).Insight into migration of Cr(VI) in self-hardening slurry materials for trench cutoff wall.ENVIRONMENTAL RESEARCH,269,13. |
| MLA | Huang, Xiao,et al."Insight into migration of Cr(VI) in self-hardening slurry materials for trench cutoff wall".ENVIRONMENTAL RESEARCH 269(2025):13. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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