| Efficacy and microbial responses of biochar-nanoscale zero-valent during in-situ remediation of Cd-contaminated sediment | |
Liu, Qunqun1,2; Sheng, Yanqing1 ; Wang, Wenjing1; Liu, Xiaozhu1,2
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| 发表期刊 | JOURNAL OF CLEANER PRODUCTION
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| ISSN | 0959-6526 |
| 2021-03-10 | |
| 卷号 | 287页码:12 |
| 关键词 | Cadmium (Cd) Sediment immobilization Nanoscale zero-valent ion Biochar Bacterial communities |
| DOI | 10.1016/j.jclepro.2020.125076 |
| 通讯作者 | Sheng, Yanqing(yqsheng@yic.ac.cn) |
| 英文摘要 | In situ immobilization of heavy metals in sediments has been considered as a low-cost and eco-friendly remediation method. In this study, biochar (BC) and BC-nanoscale zero-valent iron composite (nZVI/BC) treatments with different doses were conducted to immobilize Cd in sediments in situ. The performance of BC and nZVI/BC in changing Cd mobility and bacterial community in sediment was investigated, and their remediation efficiencies at various pH values were also explored. After 140 d of remediation, the results showed that the application of BC and nZVI/BC reduced the released Cd concentrations in the overlying water and porewater by 31-69% and 26-73%, respectively. Compared to the control, the labile Cd in treated sediments was transformed to a stable fraction, and the TCLP (toxicity characteristic leaching produce) extracted Cd decreased by 7-29%. The reduction in Cd mobility was closely related to the additional dose of BC or nZVI/BC, and the presence of nZVI greatly enhanced the ability of nZVI/BC to stabilize Cd. Notably, nZVI/BC presented a higher restriction for Cd release from sediment than BC at various pH values, and both BC and nZVI/BC showed the highest remediation effects under alkaline condition. Bacterial community analysis indicated that the richness and diversity of bacterial communities with the low-dose treatments were enhanced, while inhibition was observed at high dose treatments due to changes in the pH and toxicity of BC and nZVI/BC. This study supplies new insights into the potential effects of BC and nZVI/BC application on Cd in situ immobilization in contaminated sediments. (C) 2020 Elsevier Ltd. All rights reserved. |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) ; Regional Key Project of STS of CAS ; Key Research and Development Program of Shandong Province |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | DISSOLVED ORGANIC-MATTER ; RIVER SEDIMENTS ; STRAW BIOCHAR ; HEAVY-METALS ; COMMUNITY ; IMMOBILIZATION ; WATER ; SOIL ; BIOAVAILABILITY ; COMPOSITES |
| 研究领域[WOS] | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| WOS记录号 | WOS:000611894600001 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/27415 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心 中国科学院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | Sheng, Yanqing |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Qunqun,Sheng, Yanqing,Wang, Wenjing,et al. Efficacy and microbial responses of biochar-nanoscale zero-valent during in-situ remediation of Cd-contaminated sediment[J]. JOURNAL OF CLEANER PRODUCTION,2021,287:12. |
| APA | Liu, Qunqun,Sheng, Yanqing,Wang, Wenjing,&Liu, Xiaozhu.(2021).Efficacy and microbial responses of biochar-nanoscale zero-valent during in-situ remediation of Cd-contaminated sediment.JOURNAL OF CLEANER PRODUCTION,287,12. |
| MLA | Liu, Qunqun,et al."Efficacy and microbial responses of biochar-nanoscale zero-valent during in-situ remediation of Cd-contaminated sediment".JOURNAL OF CLEANER PRODUCTION 287(2021):12. |
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