| The spatial and vertical distribution of heavy metal contamination in sediments of the Three Gorges Reservoir determined by anti-seasonal flow regulation | |
Zhu, He1,2 ; Bing, Haijian1; Wu, Yanhong1; Zhou, Jun1; Sun, Hongyang1; Wang, Jipeng1; Wang, Xiaoxiao1
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| Corresponding Author | Bing, Haijian(hjbing@imde.ac.cn) ; Wu, Yanhong(yhwu@imde.ac.cn) |
| 2019-05-10 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| Volume | 664Pages:79-88 |
| Abstract | The contamination of heavy metals in sediments of the Three Gorges Reservoir (TGR) is increasingly concerned as a major issue for water quality since the full impoundment. In this study, the sediment profiles in the riparian and submerged areas from Filling to Zigui in the middle-low TGR mainstream were collected to investigate the stratified distribution of heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) and assess their contamination and potential eco-risk. The results showed that the concentrations of these metals in the riparian sediments did not present a marked spatial trend except the concentrations of Cd that increased towards the dam. However, the metal concentrations (except Cd) in the submerged sediments were generally higher near the dam. The concentrations of heavy metals in the riparian sediments did not show marked vertical variation, while in the submerged sediments they fluctuated dramatically with depth, indicating the metal accumulation processes in last few years. Sediment grain sizes as an indicator of hydrodynamic regimes dominated the vertical distribution of heavy metals over organic matters and Fe/Mn oxide/hydroxides. The sediments from both riparian and submerged areas of the TGR were contaminated by anthropogenic metals of Cd, Cu and Pb that were mainly from the ore mining, fossil fuel combustion, agricultural pollution and atmospheric deposition. Cadmium was a major metal pollutant in the sediments with a high contamination and potential eco-risk level. The results of this study indicate that the sorting of sediments with the anti-seasonal flow regulation determines the spatial and temporal distribution of heavy metal contamination in the sediments, and the impoundment stages of the TGR in history regulate the accumulation processes of the metals. (C) 2019 Elsevier B.V. All rights reserved. |
| Keyword | Heavy metals Vertical variation Contamination assessment Fluvial sediments Reservoir regulation |
| DOI | 10.1016/j.scitotenv.2019.02.016 |
| Indexed By | SCI |
| WOS Keyword | WATER-LEVEL-FLUCTUATION ; YANGTZE-RIVER ; SURFACE SEDIMENTS ; TRACE-ELEMENTS ; STREAM SEDIMENTS ; LAKE-SEDIMENTS ; RIPARIAN ZONE ; POLLUTION ; IMPACTS ; CHINA |
| Language | 英语 |
| Funding Project | Youth Innovation Promotion Association, Chinese Academy of Sciences[2017424] ; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000460245600009 |
| Funding Organization | Youth Innovation Promotion Association, Chinese Academy of Sciences ; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/25297 |
| Collection | 山地表生过程与生态调控重点实验室 |
| Corresponding Author | Bing, Haijian; Wu, Yanhong |
| Affiliation | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 10049, Peoples R China |
| First Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
| Corresponding Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
| Recommended Citation GB/T 7714 | Zhu, He,Bing, Haijian,Wu, Yanhong,et al. The spatial and vertical distribution of heavy metal contamination in sediments of the Three Gorges Reservoir determined by anti-seasonal flow regulation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,664:79-88. |
| APA | Zhu, He.,Bing, Haijian.,Wu, Yanhong.,Zhou, Jun.,Sun, Hongyang.,...&Wang, Xiaoxiao.(2019).The spatial and vertical distribution of heavy metal contamination in sediments of the Three Gorges Reservoir determined by anti-seasonal flow regulation.SCIENCE OF THE TOTAL ENVIRONMENT,664,79-88. |
| MLA | Zhu, He,et al."The spatial and vertical distribution of heavy metal contamination in sediments of the Three Gorges Reservoir determined by anti-seasonal flow regulation".SCIENCE OF THE TOTAL ENVIRONMENT 664(2019):79-88. |
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| The spatial and vert（2170KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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