DISTRIBUTION OF HEAVY METALS IN SURFACE SEDIMENTS OFF YANGTZE RIVER ESTUARY AND ENVIRONMENTAL QUALITY ASSESSMENT

MI Beibei; LAN Xianhong; ZHANG Zhixun; LIU Shengfa

doi:10.3724/SP.J.1140.2013.06047

Marine Geology & Quaternary Geology > 2013 > 33(6): 47-54. > DOI: 10.3724/SP.J.1140.2013.06047

MI Beibei, LAN Xianhong, ZHANG Zhixun, LIU Shengfa. DISTRIBUTION OF HEAVY METALS IN SURFACE SEDIMENTS OFF YANGTZE RIVER ESTUARY AND ENVIRONMENTAL QUALITY ASSESSMENT[J]. Marine Geology & Quaternary Geology, 2013, 33(6): 47-54. DOI: 10.3724/SP.J.1140.2013.06047

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DISTRIBUTION OF HEAVY METALS IN SURFACE SEDIMENTS OFF YANGTZE RIVER ESTUARY AND ENVIRONMENTAL QUALITY ASSESSMENT

1. Key Laboratory of Marine Hydrocarbon Resources and Environment Geology, Ministry of Land and Resource, Qingdao Institute of Marine Geology, Qingdao 266071, China;
2. First Institute of Oceanography, SOA, Qingdao 266061, China

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Received Date: August 26, 2012
Revised Date: November 19, 2012

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Abstract

Abstract

Heavy metals (Zn、Cr、Pb、Cu、As、Cd and Hg) of 187 surficial sediments from the outer part of the Yangtze River estuary were tested for study of their spatial distribution pattern and contamination level in this paper. Our results indicate that the contaminations of heavy metals transported by the Yangtze River are mainly deposited along the Yangtze River estuary-ZheJiang shoreline. The content of heavy metals decreases with the increase in distance from the shore. The contours are almost paralleled with the waterfront. The extent of heavy metal contamination is evaluated by Sediment Enrichment Factor (SEF) method and Total Potential Ecological Hazard method. The enrichment factor is larger than 2 in the west of 122.5°E off the Yangtze River estuary and the Zhejiang nearshore as a medium-hazardous polluted environment. The other part of the open sea remains unpolluted or in a-low polluted level with low ecological risk. The spatial distribution pattern of heavy metal contamination level is controlled by the materials from the Yangtze River and the Min-Zhe Coastal Current.
- sediment,
- heavy metals,
- contamination,
- Yangtze River estuary

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References (31)

References

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DISTRIBUTION OF HEAVY METALS IN SURFACE SEDIMENTS OFF YANGTZE RIVER ESTUARY AND ENVIRONMENTAL QUALITY ASSESSMENT