Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading
Liu, Qunqun; Sheng, Yanqing; Wang, Wenjing; Li, Changyu; Zhao, Guoqiang
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
2020-04-15
Volume713Pages:136650
KeywordDISSOLVED ORGANIC-MATTER EXTRACELLULAR POLYMERIC SUBSTANCES IN-SITU STABILIZATION MICROBIAL COMMUNITY METAL CONTAMINATION RIVER SEDIMENTS STRAW BIOCHAR PADDY SOILS CADMIUM IMMOBILIZATION
MOST Discipline CatalogueEnvironmental Sciences
DOI10.1016/j.scitotenv.2020.136650
Contribution Rank[Liu, Qunqun; Sheng, Yanqing; Wang, Wenjing; Li, Changyu; Zhao, Guoqiang] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai, Peoples R China; [Liu, Qunqun; Li, Changyu; Zhao, Guoqiang] Univ Chinese Acad Sci, Beijing, Peoples R China
Department海岸带环境工程技术研究与发展中心
AbstractRemediation of Cd pollution in sediments is crucial for the safety of aquatic environments and human health. In this study, four effective, common, and low-cost remediation materials (zeolite, sepiolite, red mud (RM), and biochar (BC)) loaded with nanoscale zero-valent iron (nZVI) and themselves were employed to immobilize Cd in sediments. The effects of different materials on sediment properties, immobilization effectiveness, bacterial communities, enzyme activities, and dissolved organic matter (DOM) were investigated. Results showed that sediment properties were significantly changed by the addition of immobilization materials (P < 0.05). The geochemical fraction analysis showed that the labile Cd was partially transformed to the stable fraction after immobilization, with an 11-47% decrease in the acid-soluble fraction and a 50-1000% increase in the residual fraction. The Cd immobilization effectiveness peaked at the nZVI/RM and nZVI/BC treatments, and the Cd toxicity characteristic leaching procedure (TCLP) leachabiities decreased by 42% and 44%, respectively. The modified materials were more effective for immobilizing Cd than the raw materials owing to the presence of nZVI, and the Cd TCLP leachabilities with the modified materials decreased by 15%-22% compared with the raw material treatments. Immobilization-driven reduction of bioava liable Cd enhanced the richness and diversity of bacterial communities and enzyme activities. Moreover, the immobilization treatment promoted the Fe(III)-reducing process by increasing the Fe(III)-reducing bacteria (e.g. Geobacteraceae, Bacillus, and Clostridium), which are conducive to Cd immobilization. Additionally, the DOM composition presented more autogenetic characteristics in treated groups. BC (nZVI/BC) can be selected as the priority material for Cd immobilization in sediments due to higher immobilization effectiveness and lower adverse effects on sediments. (C) 2020 Elsevier B.V. All rights reserved.
SubtypeArticle
Indexed BySCI
Language英语
WOS KeywordDISSOLVED ORGANIC-MATTER ; EXTRACELLULAR POLYMERIC SUBSTANCES ; IN-SITU STABILIZATION ; MICROBIAL COMMUNITY ; METAL CONTAMINATION ; RIVER SEDIMENTS ; STRAW BIOCHAR ; PADDY SOILS ; CADMIUM ; IMMOBILIZATION
WOS IDWOS:000514544700118
Funding OrganizationChinese Academy of Sciences (CAS)Chinese Academy of Sciences [XDA23050203] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [41373100] ; Regional Key Project of STS of CAS [KFJ-STS-QYZX-057] ; Key Research and Development Program of Shandong Province [2019GSF109002]
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/25048
Collection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
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai, Peoples R China;
2.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Liu, Qunqun,Sheng, Yanqing,Wang, Wenjing,et al. Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,713:136650.
APA Liu, Qunqun,Sheng, Yanqing,Wang, Wenjing,Li, Changyu,&Zhao, Guoqiang.(2020).Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading.SCIENCE OF THE TOTAL ENVIRONMENT,713,136650.
MLA Liu, Qunqun,et al."Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading".SCIENCE OF THE TOTAL ENVIRONMENT 713(2020):136650.
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