渤海倾倒区沉积物重金属富集特征及其潜在生态风险评价  

Enrichment of heavy metals in the surface sediments from the dumping areas in Bohai sea and assessment of their potential ecological risk

作　　者：郑琳[1,2] 刘艳[3] 袁媛[1,2] 周春莹[1,2] 曲亮[1,2] 

机构地区：[1]国家海洋局海洋溢油鉴别与损害评估技术重点实验室,山东青岛266033 [2]国家海洋局北海环境监测中心,山东青岛266033 [3]国家海洋局烟台海洋环境监测中心站,山东烟台264006

出　　处：《海洋通报》2014年第3期342-348,共7页Marine Science Bulletin

基　　金：海洋公益性行业科研专项(201105010-04)

摘　　要：根据2012年渤海6个海洋倾倒区沉积物重金属监测结果,采用富集系数法和潜在生态风险评价法对Hg、Cd、Cu、Pb、Zn、As共6种重金属富集特征和潜在生态风险进行了分析和评价。结果表明:渤海倾倒区沉积物中As、Zn、Hg、Pb富集度相对较高,Cu和Cd富集度较低。其中,黄骅倾倒区(C1区)和天津港倾倒区(C区)As富集显著,为较高和中等污染程度;葫芦岛港倾倒区Hg、Zn、锦州港倾倒区Zn富集达到中等污染程度。渤海倾倒区沉积物重金属综合潜在生态风险处于较低水平,风险排序为As>Cd>Hg>Pb>Cu>Zn。其中具有较高潜在生态风险的重金属为Hg、Cd和As,分布区域在葫芦岛港、锦州港和黄骅港倾倒区。Based on the investigation data of heavy metals in the surface sediments from six dumping areas in Bohai sea, The accumulating degree and the potential ecological risk of Hg, Cd, Cu, Pb, Zn and As were analyzed and assessed by using the method of accumulation coefficients and the method of potential ecological indices. The results showed that the accumulating degree of As, Zn, Hg and Pb appeared high among six heavy metals in surface sediments, and that of Cu and Cd were lower. The enrichment of As appeared in Huanghua port dumping zone （C1 zone） and Tianjin port dumping zone （C zone） , which reached the high level and the moderate level. The enrichment of Zn appeared in Huludao port dumping zone and Jinzhou port dumping zone, which reached the moderate level. The enrichment of Hg appeared in Huludao port dumping zone, which reached the moderate level. The results of assessment of potential ecological risk demonstrated that the integrated potential ecological risk of these heavy metals to the ocean ecology system were very light in the dumping areas of Bohai sea, which belongs to the slight potential ecological risk level. The order of potential ecological risk was As﹥Cd﹥Hg﹥Pb﹥Cu﹥Zn. Among these heavy metals, the degree of potential ecological risk of Hg, As and Cd appeared higher, which appeared in Huludao port dumping zone, Jinzhou port dumping zone, Huanghua ports dumping zone （C1 zone） .

关 键 词：渤海 海洋倾倒区 沉积物 重金属 潜在生态风险 

分 类 号：X824[环境科学与工程—环境工程]