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根据2010年3月、6月对舟山六横岛邻近海域表层沉积物重金属调查资料,采用单因子指数法和Hakanson生态风险指数法对Cu、Pb、Cd、Zn、Hg、As、Cr元素进行分析与评价,并与2010年8月舟山嵊泗近岸海域表层沉积物质量进行比较。研究结果表明:该海域沉积物综合污染程度为中等水平,各种元素污染程度高低依次为Zn>Cu>Cd>Pb>Cr>As>Hg,主要重金属污染因子为Zn、Cu、Cd元素。总体而言,该海域沉积物潜在生态风险性低,风险程度高低依次为Cd>Hg>Cu>Pb>As>Cr>Zn,其中各站位Cd的生态风险参数均值大于40,Cd为该海域的最大潜在生态风险因子。
According to the survey data of heavy metals in the surface sediments of the adjacent waters of Liuheng Island in Zhoushan in March and June 2010, the elements Cu, Pb, Cd, Zn, Hg, As and Cr were analyzed by single factor index method and Hakanson ecological risk index method And compared with the surface sediment quality of the coastal area of Shengsi, Zhoushan in August 2010. The results show that the comprehensive pollution of the sediments in the sea area is moderate, and the order of pollution of various elements is Zn> Cu> Cd> Pb> Cr> As> Hg. The main heavy metal pollution factors are Zn, Cu and Cd. Overall, the potential ecological risk of the sediments in the sea area is low, and the order of the risk level is Cd> Hg> Cu> Pb> As> Cr> Zn. The average ecological risk parameter of Cd in each station is more than 40, Of the maximum potential ecological risk factors.