期刊
MARINE POLLUTION BULLETIN
卷 115, 期 1-2, 页码 551-558出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.12.039
关键词
Heavy metals; Surface sediments; Ecological risk; Mariculture; Weihai coast
资金
- National Key Research and Development Program of China [2016YFA0601402]
- National Basic Research Program of China [2013CB955702]
- National Natural Science Foundation of China [41606092]
- China SOA grant [GASI-03-01-02-05]
- Key R&D program of the Shandong Province, China [2015GSF115036]
- key laboratory of marine ecology and environmental science and engineering, SOA [MESE-2016-02]
The Weihai coast is a representative zone with fifty-year history of mariculture in China. Algae and shellfish are the main cultured species, other species including fish and sea cucumber are also cultivated. In this study, heavy metals in surface sediments, sampled along the Weihai coast during May yearly between 2009 and 2013 were investigated in terms of their contents and spatiotemporal variation. The contents of Zn, Cr, Cu, Cd, Pb and As showed different spatiotemporal variations and ranged between 11.6 and 115.9, 4.15-51.3, 5.2-21.9, 0.02-0.33, 6.0-54.2, and 2.9-18.7 mu g g(-1), respectively. Among them, Zn, Cu and As declined during the five years. Ecological risk assessment revealed that Cd posed a moderate risk, as compared to other five elements, which were relatively low risks in surface sediments. Source analysis revealed that Zn, Cr and Cd were mainly from lithogenic contribution, while As was likely from anthropogenic discharges. (C) 2016 Elsevier Ltd. All rights reserved.
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