Content and ecological risk assessment of heavy metals in the surface sediments of Qingcaosha Reservoir in Shanghai

ZHU Yiping; LI Xiaofei; LIANG Xia

doi:10.3969/j.issn.1000-5641.2021.02.006

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Mar. 2021

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ZHU Yiping, LI Xiaofei, LIANG Xia. Content and ecological risk assessment of heavy metals in the surface sediments of Qingcaosha Reservoir in Shanghai[J]. Journal of East China Normal University (Natural Sciences), 2021, (2): 54-62. doi: 10.3969/j.issn.1000-5641.2021.02.006

Citation:

ZHU Yiping, LI Xiaofei, LIANG Xia. Content and ecological risk assessment of heavy metals in the surface sediments of Qingcaosha Reservoir in Shanghai[J]. Journal of East China Normal University (Natural Sciences), 2021, (2): 54-62. doi: 10.3969/j.issn.1000-5641.2021.02.006

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Content and ecological risk assessment of heavy metals in the surface sediments of Qingcaosha Reservoir in Shanghai

doi: 10.3969/j.issn.1000-5641.2021.02.006

ZHU Yiping^1
,,
LI Xiaofei²,
LIANG Xia^{3
,
,}

1.
Shanghai Chengtou Raw Water Limited Company, Shanghai　200125, China
2.
School of Geographical Sciences, Fujian Normal University, Fuzhou　350007, China
3.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai　200241, China

Received Date: 2020-03-16
Publish Date: 2021-03-30

Abstract

Abstract

Surface sediments were collected from five representative areas—the floodgate entrance, the north and south sides of the reclamation area, and the central and downstream sections—of Qingcaosha Reservoir; the pollution characteristics and potential ecological risk of seven heavy metals (Cu, Zn, Pb, Cr, Cd, As and Hg) in these sediments were subsequently investigated. Results showed that the heavy metal content in the surface sediments showed spatial variations: the content was relatively higher in the center of the reservoir and was low in the north and south sides of the reclamation area. Heavy metals in the surface sediments, in addition, were mainly in the residual fraction; the content of heavy metals in the exchangeable fraction was extremely low. A potential ecological risk assessment indicated that the comprehensive potential ecological risk index (E_RI) of the investigated heavy metals ranged from 55 to 113. The maximum E_RI value was observed around the floodgate of the reservoir entrance, and low E_RI values were observed at the north and south sides of the reclamation area. The E_RI was lower than the threshold for low ecological risk, indicating that heavy metals in the surface sediments of the Qingcaosha Reservoir have low potential ecological risk.
- heavy metal,
- sediment,
- ecological risk,
- reservoir,
- drinking water source

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References(41)

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