Spatio-temporal distribution and environmental risk of arsenic in sediments of the East China Sea

doi:10.1016/j.chemgeo.2012.12.009

	Spatio-temporal distribution and environmental risk of arsenic in sediments of the East China Sea
	Duan, Liqin; Song, Jinming; Yuan, Huamao; Li, Xuegang; Li, Ning; Song, JM
	2013-02-24
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	340 页码:21-31
文章类型	Article
摘要	To understand the spatial and temporal distributions, environmental risks and sources of As, 38 surface sediments and three sediment cores were collected in the East China Sea (ECS). As concentrations in sediments ranged from 1.70 to 22.1 mu g/g with an average of 11.5 mu g/g. As concentration had positive correlations with clay + silt and total organic carbon (TOC) content with higher As values near the Changjiang Estuary and Hangzhou Bay mouth, indicating fine-grained sediments and riverine inputs as the main factors controlling As distribution. Chemical fraction analysis, sediment quality guidelines, together with geoaccumulation index, suggested that As in sediments of the ECS was at low risk, low adverse effect and moderately polluted level. Vertical profiles of As concentrations and burial fluxes, combined with Pb-210 dating, reflected the As pollution history in the ECS within the last one hundred years. It showed a stable trend before one hundred years ago, a slight increase from the 1900s to 1990s, with peak values in the 1980s and 1990s, and a declining trend after the 1990s to 2009 with a relatively low value in 1998. These trends were closely associated with both natural and anthropogenic activities. (c) 2012 Elsevier B.V. All rights reserved.; To understand the spatial and temporal distributions, environmental risks and sources of As, 38 surface sediments and three sediment cores were collected in the East China Sea (ECS). As concentrations in sediments ranged from 1.70 to 22.1 mu g/g with an average of 11.5 mu g/g. As concentration had positive correlations with clay + silt and total organic carbon (TOC) content with higher As values near the Changjiang Estuary and Hangzhou Bay mouth, indicating fine-grained sediments and riverine inputs as the main factors controlling As distribution. Chemical fraction analysis, sediment quality guidelines, together with geoaccumulation index, suggested that As in sediments of the ECS was at low risk, low adverse effect and moderately polluted level. Vertical profiles of As concentrations and burial fluxes, combined with Pb-210 dating, reflected the As pollution history in the ECS within the last one hundred years. It showed a stable trend before one hundred years ago, a slight increase from the 1900s to 1990s, with peak values in the 1980s and 1990s, and a declining trend after the 1990s to 2009 with a relatively low value in 1998. These trends were closely associated with both natural and anthropogenic activities. (c) 2012 Elsevier B.V. All rights reserved.
关键词	Arsenic Sources Risk Assessment Burial Fluxes Sediments The East China Sea
学科领域	Geochemistry & Geophysics
DOI	10.1016/j.chemgeo.2012.12.009
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000319238900003
WOS关键词	HEAVY-METALS ; ORGANIC-CARBON ; BOHAI BAY ; INTERTIDAL SEDIMENTS ; SURFICIAL SEDIMENTS ; ALPHA-SPECTROMETRY ; QUALITY GUIDELINES ; SURFACE SEDIMENTS ; MARINE-SEDIMENTS ; YANGTZE-RIVER
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：40[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/16495
专题	海洋生态与环境科学重点实验室
通讯作者	Song, JM
作者单位	Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Duan, Liqin,Song, Jinming,Yuan, Huamao,et al. Spatio-temporal distribution and environmental risk of arsenic in sediments of the East China Sea[J]. CHEMICAL GEOLOGY,2013,340:21-31.
APA	Duan, Liqin,Song, Jinming,Yuan, Huamao,Li, Xuegang,Li, Ning,&Song, JM.(2013).Spatio-temporal distribution and environmental risk of arsenic in sediments of the East China Sea.CHEMICAL GEOLOGY,340,21-31.
MLA	Duan, Liqin,et al."Spatio-temporal distribution and environmental risk of arsenic in sediments of the East China Sea".CHEMICAL GEOLOGY 340(2013):21-31.

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