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

doi:10.1007/s10661-022-09975-w

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Dissolved oxygen drives the environmental behavior of heavy metals in coastal sediments
	Liu, Xiaozhu 1,2; Sheng, Yanqing 2; Liu, Qunqun 1,2; Jiang, Ming 1,2
刊名	ENVIRONMENTAL MONITORING AND ASSESSMENT
	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
DOI	10.1007/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
内容类型	期刊论文
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
通讯作者	Sheng, Yanqing
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai, 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.