The distribution of heavy metal contents in surface sediments of the Changjiang Estuary in China and surrounding coastal areas

DONG Ai-guo; ZHAI Shi-kui; ZABEL Matthias; YU Zeng-hui

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Article Navigation > Haiyang Xuebao > 2009 > 31(6): 54-68

DONG Ai-guo, ZHAI Shi-kui, ZABEL Matthias, YU Zeng-hui. The distribution of heavy metal contents in surface sediments of the Changjiang Estuary in China and surrounding coastal areas[J]. Haiyang Xuebao, 2009, 31(6): 54-68.

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The distribution of heavy metal contents in surface sediments of the Changjiang Estuary in China and surrounding coastal areas

1.
Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education, Ocean University of China, Qingdao 266100, China;Fachbereich Geowissenschaften, Universität Bremen, Postfach 330440, D-28334, Germany
2.
Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education, Ocean University of China, Qingdao 266100, China
3.
Fachbereich Geowissenschaften, Universität Bremen, Postfach 330440, D-28334, Germany

Received Date: 2008-04-16
Rev Recd Date: 2009-03-06

Abstract

Abstract

In order to discuss the response of heavy metals to human activities, two cruises'data in 2003and 2006 and surface sediments were collected in the Changjiang Estuary and its surrounding coastal areas. Contents of some elements (chromium, copper, nickel, lead, zinc, calcium and strontium) and grainsize composition were analyzed. The result showed that there were no significant changes in the pattern of sediment distribution, although the percentages of clay component increased significantly. The low content and zone-type distribution of heavy metals were observed and heavy metals were enriched in an mud area. And the two areas of heavy metal high contents were located in the turbidity maximum zone and the west of plume front which was caused by the mixing between diluted water and seawater. Terrigenous discharge, hydrographic dynamics, adsorption and flocculation played important role in the distribution of heavy metals. In addition, the redox condition and the human activity which was more important for lead and zinc, were also two important factors. The Phase-Ⅰ engineering of Sanxia Reservoir stored water since 2003, there had been not obvious change in the heavy metal deposition mechanism of surface sediments in the Changjiang Estuary, but the contents of heavy metals had a gradually decreasing trend.
- Changjiang Estuary in China,
- surface sediment,
- heavy metal element,
- Sanxia Reservoir

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References(32)

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