浙江南部近岸海域表层沉积物中重金属污染评价

发布时间：2017-12-27 09:03

本文关键词：浙江南部近岸海域表层沉积物中重金属污染评价　出处：《环境污染与防治》2016年07期 　论文类型：期刊论文

【摘要】：对浙江南部近岸海域表层沉积物中重金属Cu、Pb、Zn、Cd、Cr、Hg、As的浓度进行了分析,25%的采样点Cu浓度超出了《海洋沉积物质量》(GB 18668—2002)的第一类标准限值,其余6种重金属的浓度均未超过GB 18668—2002的第一类标准限值。相关性分析表明,有机质是影响沉积物中重金属分布的重要因素,Cu、Zn、Cr、Cd、Pb、As表现出同源性。采用单因子指数法和潜在生态风险指数法评价沉积物中重金属污染现状及其潜在生态风险,结果表明,重金属污染现状和潜在生态风险均处于较低水平,Hg为首要潜在生态风险因子。
[Abstract]:The concentration of heavy metals in the surface sediments from coastal waters of southern Zhejiang in Cu, Pb, Zn, Cd, Cr, Hg and As were analyzed and 25% sampling points and the concentration of Cu exceeded the "marine sediment quality" (GB 18668 - 2002) limit of first class standard, the concentration of 6 heavy metals did not exceed the first class standard GB 18668 - 2002 limit. The correlation analysis showed that organic matter was an important factor affecting the distribution of heavy metals in the sediments, and Cu, Zn, Cr, Cd, Pb and As showed homology. The single factor index method and potential ecological risk index method were used to evaluate the status and potential ecological risk of heavy metals in sediments. The results showed that heavy metal pollution and potential ecological risk were at a low level, and Hg was the first to have potential ecological risk factors.
【作者单位】：浙江省舟山海洋生态环境监测站;
【基金】：环保公益性行业科研专项(No.201309007)
【分类号】：X55
【正文快照】： 重金属是近海沉积环境中的最主要污染物之一[1]。沉积物是重金属污染物“蓄积库”,水中的重金属绝大部分会经过物理、化学作用富集在表层沉积物中,因此沉积物中的重金属含量水平能在一定程度上反映该海域的环境质量现状。重金属污染具有来源广、残留时间长、易蓄积、污染后不

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