Liu, Qunqun1,2; Sheng, Yanqing1
; Wang, Wenjing1; Liu, Xiaozhu1,2发表期刊JOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
2021-03-10
卷号287页码:12
关键词Cadmium (Cd)Sediment immobilizationNanoscale zero-valent ionBiocharBacterial communities
DOI10.1016/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
引用统计被引频次：1[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/27415
专题中科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
中科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 7714Liu, 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.
APALiu, 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.
MLALiu, 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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