秦皇岛海域表层沉积物重金属含量分布特征及生态风险评价  

Distribution and ecological risk assessment of heavy metals in the surface sediments along coast of Qinhuangdao

作　　者：陈燕[1] 许自舟[2] 胡莹莹[2] 张建乐[1] 马继成[1] 

机构地区：[1]国家海洋局秦皇岛海洋环境监测中心站,河北秦皇岛066002 [2]国家海洋环境监测中心,辽宁大连116023

出　　处：《海洋环境科学》2014年第1期66-70,共5页Marine Environmental Science

基　　金：海洋公益性行业科研专项(201005014);海洋公益性行业科研专项(201305003)

摘　　要：对秦皇岛海域34个表层沉积物中的Hg、As、Cu、Pb、Zn、Cd、Cr的含量进行了分析,Hg含量的最大值位于调查海域的南部远岸处,空间分布东部高于西部。As、Cu、Pb、Zn、Cd、Cr 6种重金属的分布具有相似的规律性,在调查海域近岸和东南部形成两个高值区,大体分布东北部高于西南部。采用潜在生态风险指数法对秦皇岛近岸表层沉积物重金属污染的潜在生态风险进行了评价,结果表明,秦皇岛海域表层沉积物中重金属总的潜在生态危害程度低,7种重金属的潜在生态危害由大到小依次为Hg>Cd>As>Cu>Pb>Cr>Zn。Analysis were made of the contents of Hg、As、Cu、Pb、Zn、Cd、Cr in the surface sediments at 34 stations along coast of Qinhuangdao. The maximum of Hg is in the south of the survey area,the content of Hg in the eastern part is higher than that in the west. As、Cu、Pb、Zn、Cd、Cr are similar in source,there is two high value areas in the offshore and the southeast of surveying area,the contents of that six heavy metals in the northeast are higher than that in the southwest. Adopting Hankanson index method,the potential ecological risk of heavy metals from the surface sediments is evaluated. The results indicate that the potential ecological risk is low in the surface sediments of Qinhuangdao,and the order of the potential ecological risk is Hg〉Cd〉As〉Cu〉Pb〉Cr〉Zn.

关 键 词：秦皇岛海域 沉积物 重金属 分析 评价 

分 类 号：P736.41[天文地球—海洋地质]