Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary

doi:10.1016/j.scitotenv.2021.145269

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary
	Duan, Liqin 1,3,4,5; Song, Jinming 1,3,4,5; Yin, Meiling 3,5; Yuan, Huamao 1,3,4,5; Li, Xuegang 1,3,4,5; Zhang, Yuting 3,5; Yin, Xuebo 1,2,3,4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-05-15
卷号	769 页码:10
关键词	Arsenic Dynamic Net reaction rate The sediment-water interface The Changjiang Estuary
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.145269
通讯作者	Duan, Liqin(duanliqin@qdio.ac.cn)
英文摘要	The dynamics of As at the sediment-water interface (SWI) is an important link in driving As release into the upper water column to affect biological activities. At present, it is unclear about the As cycling at the SWI, especially under the influence of seasonal hypoxia in the Changjiang Estuary. In this study, the profile variations of As in porewater and solid phases from the Changjiang Estuary were studied. Results suggested that As profiles presented the "removal-release-removal" pattern with depth. Arsenic profiles were typically characterized by subsurface maxima in porewater and surficial enrichment in solid phase, which were dosely related to Fe and S cycling. The occurrence of porewater As peaks and its obvious speciation transition at subsurface layers, companied by the conversion of dominant phases of solid As from reductive to oxidative fractions at the same layers indicated the reductive release of As at redoxcline. Arsenic species, saturation indexes (SI) and net reaction rates (R-net(As)) suggested that the removal of As at surface and deep layers were attributed to the adsorption of As (V) by Fe oxides and the formation of orpiment and/or adsorption by Fe sulfides, respectively. The benthic hypoxic environment in late-summer was more favorable for upward migration and diffusion of As. This process was considered as an important contribution to the elevated aquatic As in the Changjiang Estuary. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41976037] ; National Natural Science Foundation of China[41676068] ; Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; Foundation for Huiquan Young Scholar of Institute of Oceanology, Chinese Academy of Sciences
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000626618100137
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/170470]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Duan, Liqin
作者单位	1.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Duan, Liqin,Song, Jinming,Yin, Meiling,et al. Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,769:10.
APA	Duan, Liqin.,Song, Jinming.,Yin, Meiling.,Yuan, Huamao.,Li, Xuegang.,...&Yin, Xuebo.(2021).Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary.SCIENCE OF THE TOTAL ENVIRONMENT,769,10.
MLA	Duan, Liqin,et al."Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary".SCIENCE OF THE TOTAL ENVIRONMENT 769(2021):10.