Redox conditions and nutrients affect the mobility of arsenic in coastal sediments

doi:10.1007/s12665-022-10573-9

	Redox conditions and nutrients affect the mobility of arsenic in coastal sediments
	Liu, Xiaozhu 1,2; Ma, Tao 1,2; Liu, Qunqun 1; Sheng, Yanqing1
发表期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
	2022-09-01
卷号	81 期号:18 页码:10
关键词	Arsenic Coastal sediments Redox conditions Nutrients
DOI	10.1007/s12665-022-10573-9
通讯作者	Sheng, Yanqing(yqsheng@yic.ac.cn)
英文摘要	In this study, the effects of redox conditions, nitrogen (NH4+-N and NO3--N) and phosphate in the overlying water on the release of arsenic (As) in coastal sediments were investigated. The results indicated that the release of As under anaerobic conditions presented a release-dynamic equilibrium pattern. The reduction of arsenate (As(V)) to arsenite (As(III)) under anaerobic conditions was the main factor promoting the release of As. The reductive dissolution of Fe(III) oxides contributed very limited to the release; the release-remove-release pattern was observed under aerobic conditions. Although Fe(III) oxides has strong adsorption capacity for As, sulfide oxidation may be a source of As, which may continuously release As under aerobic conditions. In addition, low concentration (< 6 mg L-1) of nitrogen may stimulate anaerobic metabolism of microorganisms, resulting in reduction and dissolution of As. The low pH of high concentration (> 6 mg L-1) of nitrogen may affect the microbial community and thus decreased the concentration of As. Since the reduction of Fe(III) oxides decreased the adsorption sites, the competitive adsorption of phosphate had no significant effect on the release of As under anaerobic conditions. Totally, this study provides a new understanding of the behavior of As in coastal sediments under variable environments.
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Project of Shandong Provincial Natural Science Foundation
收录类别	SCI
语种	英语
关键词[WOS]	MICROBIAL SULFATE REDUCTION ; DISSOLVED-OXYGEN ; HEAVY-METALS ; RISK-ASSESSMENT ; RIVER ; RELEASE ; SULFUR ; PH ; GEOCHEMISTRY ; PHOSPHORUS
研究领域[WOS]	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS记录号	WOS:000852382700002
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.cn/handle/133337/31674
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学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
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 264003, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaozhu,Ma, Tao,Liu, Qunqun,et al. Redox conditions and nutrients affect the mobility of arsenic in coastal sediments[J]. ENVIRONMENTAL EARTH SCIENCES,2022,81(18):10.
APA	Liu, Xiaozhu,Ma, Tao,Liu, Qunqun,&Sheng, Yanqing.(2022).Redox conditions and nutrients affect the mobility of arsenic in coastal sediments.ENVIRONMENTAL EARTH SCIENCES,81(18),10.
MLA	Liu, Xiaozhu,et al."Redox conditions and nutrients affect the mobility of arsenic in coastal sediments".ENVIRONMENTAL EARTH SCIENCES 81.18(2022):10.