特呈岛海洋公园沉积物重金属生态风险研究  

Ecological Risk Evaluation of Heavy Metal Pollution in Top Sediments of Ocean Park in Techeng Island

作　　者：张翠萍[1] 贾后磊[1] 王平[1] 谢健[1] 姚少慧[2] 王银霞[1] 

机构地区：[1]国家海洋局南海海洋工程勘察与环境研究院,广东广州510300 [2]中国科学院南海海洋研究所,广东广州510301

出　　处：《环境科学与技术》2015年第6期217-220,共4页Environmental Science & Technology

基　　金：广东省环境污染控制与修复技术重点实验室开放研究基金项目资助(2013K0011);国家海洋局南海分局海洋科学技术局长基金研究项目(1305)

摘　　要：基于对特呈岛海洋公园周边海域表层沉积物的调查研究,分析了表层沉积物中Cu、Pb、Zn、Cd和Hg 5类重金属的污染特征。采用Hakanson潜在生态风险指数法对其评价。结果表明,表层沉积物中Cu、Cd和Hg的单因子污染系数小于1,Pb最大超标指数为2.72,各站位综合污染指数均小于5.48,重金属处于低污染状态,各重金属污染程度依次为Pb>Zn>Cu>Hg>Cd。5类重金属的潜在生态危害系数均小于40,潜在生态风险指数RI远低于150,属于低生态危害范围。Investigations of top sediments of the waters surrounding Ocean Park in Techeng Island were conducted, based on which pollution characteristics of five kinds of heavy metal such as Cu, Pb, Zn, Cd and Hg in top sediments were analyzed and the ecological risk evaluated using the Hakanson potential ecological risk index method. The results of this evaluation showed that the single factor pollution coefficient regarding Cu, Cd and Hg in top sediments was less than 1, while that of Pb was 2.72. The comprehensive pollution indexes regarding the five kinds of heavy metal at all the sampling points concerned were less than 5.48, indicating that heavy metal pollution was still at a low level. Ranking of the five heavy metals in terms of pollution degree were Pb〉Zn〉Cu〉Hg〉Cd. As for the potential ecological risk coefficient, the results suggested all the five kinds of heavy metal were all less than 40; also the potential ecological risk index （RI） of them was far lower than 150, belonging to low range of ecological risk.

关 键 词：特呈岛海洋公园 表层沉积物 重金属 潜在生态风险 

分 类 号：X145[环境科学与工程—环境科学]