海口湾东部表层沉积物重金属污染特征及生态风险评价  

Contamination Characteristic and Potential Ecological Risk of Heavy Metals in the Surface Sediment from East Haikou Bay

作　　者：刘建波[1] 刘洁[2] 陈春华[1] 王道儒[1] 林国尧 

机构地区：[1]海南省海洋开发规划设计研究院,海南海口570125 [2]海南医学院,海南海口571199

出　　处：《安徽农业科学》2012年第17期9416-9418,9472,共4页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金重点项目(40830850)

摘　　要：对海口湾东部10个表层沉积物中的重金属元素进行了分析,并运用Hakanson潜在生态危害指数法,对重金属的污染程度和潜在生态风险程度进行了评价。研究结果表明,表层沉积物中7种重金属平均含量高低依次为Cr>Zn>Pb>Cu>As>Cd>Hg;重金属平均污染程度由高到低依次As>Cr>Cd>Cu>Pb>Zn>Hg,As污染指数最高,属于中污染水平,其余各重金属处于低污染,7种重金属综合污染程度属于低水平;重金属的潜在生态风险大小依次为Cd>As>Hg>Cu>Pb>Cr>Zn,Cd是主要的潜在生态风险因子,研究区域内重金属总的潜在生态风险程度低。该研究为了解海口湾东部海域重金属的污染现状提供了科学依据。Ten surface sediment samples from East Haikou Bay were collected for analyzing their heavy metals,and the contamination degree and potential ecological risks of these heavy metals were assessed by using Hakanson potential ecological index methods. The results showed that the order of average concentration of heavy metals was Cr 〉 Zn 〉 Pb 〉 Cu 〉 As 〉 Cd 〉 Hg. The average degree of contamination from to low high of these heavy metals was As 〉 Cr 〉 Cd 〉 Cu 〉 Pb 〉 Zn 〉 Hg. The pollution index of seven appeared to be the highest among all heavy metals, and was up to the middle level of contamination,and others were lower. The degree of integrated contamination index of seven heavy metals was low. The order of potential ecological risk level of all these heavy metals was Cd 〉 As 〉 Hg 〉 Cu 〉 Pb 〉 Cr 〉 Zn ,and Cd was the principal potential ec- ological risk factor. The potential ecological risk level of integrated heavy metals was low in the study area. The study provided references for ex- ploring the pollution status of Heavy metals in East Haikou Bay.

关 键 词：表层沉积物 重金属 污染特征 潜在生态风险 

分 类 号：S181.3[农业科学—农业基础科学]