Research Center for Marine Biology and Carbon Sequestration, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Mar Pollut Bull. 2017 Feb 15;115(1-2):551-558. doi: 10.1016/j.marpolbul.2016.12.039. Epub 2016 Dec 20.
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 2.9-18.7μgg, 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.
威海沿海是中国具有五十年海水养殖历史的代表性区域。藻类和贝类是主要的养殖物种，其他物种如鱼类和海参也有养殖。本研究于 2009 年至 2013 年每年 5 月在威海沿海采集表层沉积物，调查了重金属的含量及其时空变化。Zn、Cr、Cu、Cd、Pb 和 As 的含量表现出不同的时空变化，范围分别为 11.6-115.9、4.15-51.3、5.2-21.9、0.02-0.33、6.0-54.2 和 2.9-18.7μg/g。其中，Zn、Cu 和 As 在五年间呈下降趋势。生态风险评估显示，与其他五种元素相比，Cd 具有中等风险，而表层沉积物中的其他五种元素风险较低。来源分析表明，Zn、Cr 和 Cd 主要来自岩石成因贡献，而 As 可能来自人为排放。
