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Dissolved oxygen drives the environmental behavior of heavy metals in coastal sediments

文献类型：期刊论文

作者Liu, Xiaozhu1,2; Sheng, Yanqing1; Liu, Qunqun1,2; Jiang, Ming1,2
刊名ENVIRONMENTAL MONITORING AND ASSESSMENT
出版日期2022-04-01
卷号194期号:4页码:12
关键词Sediments Heavy metals Dissolved oxygen Exchange fluxes
ISSN号0167-6369
DOI10.1007/s10661-022-09975-w
通讯作者Sheng, Yanqing(yqsheng@yic.ac.cn)
英文摘要In this study, the impacts of dissolved oxygen (DO) on dynamics concentrations of heavy metals (Cu, Cd, Cr, and Pb) from estuary sediments were investigated in a 49-day laboratory simulation. The exchange flux method, Bureau Communautaire de Reference (BCR) sequential extraction procedure, and risk assessment code (RAC) were used to analyze the behavior of heavy metals. The results indicated that oxic environments promoted the concentrations of Cu and Cd in overlying water compared to the anoxic environments. The exchange fluxes showed that the diffusion of Cu, Cd, Cr, and Pb from sediments was the predominant process in the first 9 days, and a metastable equilibrium state was gradually reached in the later period under anoxic conditions. However, oxic conditions extended the time required to reach metastable equilibrium for Cu over the sediment-water (overlying water) interface (SWI). Although the reducible fractions of Cu, Cd, and Pb accounted for a large proportion of their total levels, the release ability of Cu, Cd, and Pb was limited by the high content of sulfide under anoxic conditions. The RAC values indicated that anoxic environments increased the proportion of acid-soluble fraction. The information obtained from this study highlights the potential risk for re-release of heavy metal from sediments under different redox conditions.
WOS关键词SURFACE SEDIMENTS ; RISK-ASSESSMENT ; RIVER ESTUARY ; RELEASE ; FRACTIONATION ; MOBILIZATION ; ACID ; BIOAVAILABILITY ; SALINITY ; QUALITY
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000773309500002
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Project of Shandong Provincial Natural Science Foundation ; Key Research and Development Program of Shandong Province
源URL[http://ir.yic.ac.cn/handle/133337/31384]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_山东省海岸带环境工程技术研究中心
通讯作者Sheng, Yanqing
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xiaozhu,Sheng, Yanqing,Liu, Qunqun,et al. Dissolved oxygen drives the environmental behavior of heavy metals in coastal sediments[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2022,194(4):12.
APA Liu, Xiaozhu,Sheng, Yanqing,Liu, Qunqun,&Jiang, Ming.(2022).Dissolved oxygen drives the environmental behavior of heavy metals in coastal sediments.ENVIRONMENTAL MONITORING AND ASSESSMENT,194(4),12.
MLA Liu, Xiaozhu,et al."Dissolved oxygen drives the environmental behavior of heavy metals in coastal sediments".ENVIRONMENTAL MONITORING AND ASSESSMENT 194.4(2022):12.

入库方式： OAI收割

来源：烟台海岸带研究所

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