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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
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume340Pages:21-31
SubtypeArticle
AbstractTo 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.
KeywordArsenic Sources Risk Assessment Burial Fluxes Sediments The East China Sea
Subject AreaGeochemistry & Geophysics
DOI10.1016/j.chemgeo.2012.12.009
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000319238900003
WOS KeywordHEAVY-METALS ; ORGANIC-CARBON ; BOHAI BAY ; INTERTIDAL SEDIMENTS ; SURFICIAL SEDIMENTS ; ALPHA-SPECTROMETRY ; QUALITY GUIDELINES ; SURFACE SEDIMENTS ; MARINE-SEDIMENTS ; YANGTZE-RIVER
WOS HeadingsScience & Technology ; Physical Sciences
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Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/16495
Collection海洋生态与环境科学重点实验室
Corresponding AuthorSong, JM
AffiliationChinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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