摘要
对防城港临时性海洋倾倒区表层沉积物重金属的含量和分布进行了对比分析,并采用污染指数法和Hakanson潜在生态风险指数法对其重金属的污染特征及潜在生态风险程度进行了评价。结果表明,倾倒区沉积物Hg、Pb、As和Zn的含量显著性升高;总体污染程度为中等污染,各重金属元素的污染程度由高到低排序依次为As(3.59)>Hg(2.19)>Pb(1.42)>Zn(1.20)>Cu(1.05)>Cd(0.91),其中As是主要污染因子;该海域表层沉积物重金属总体潜在生态风险程度为中等,各重金属元素的潜在生态风险程度由高到低排序依次为Hg(87.74)>As(35.89)>Cd(27.27)>Pb(7.08)>Cu(5.23)>Zn(1.20),其中Hg为主要潜在生态风险因子。
A comparative analysis on the content and distribution of heavy metals in surface sediments of Fangchenggang temporary marine dumping area was conducted, and the pollution status and the potential ecological risk of heavy metals in Fangchenggang temporary marine dumping area were studied using the pollution index and Hakanson potential ecological risk index method. The results showed that the content of Hg, Pb, As and Zn in surface sediments of dumping area surface sedimentary was increased significantly; the overall contamination level of heavy metals in surface sediments was intermediate in the dumping area; the levels of heavy metals pollution were followed from high to low by As （3.59）〉Hg （2.19）〉Pb （1.42）〉Zn （1.20）〉Cu （1.05）〉Cd （0.91）, and As was the key pollution factor; the overall level of potential ecological risk of heavy metals in the sediments was medium; the levels of potential ecological risks of heavy metals were followed from high to low by Hg （87.74）〉As （35.89）〉Cd （27.27）〉Pb （7.08）〉Cu （5.23）〉Zn （1.20）, and Hg was the key factor of potential ecological risk.
出处
《生态科学》
CSCD
北大核心
2013年第2期177-182,共6页
Ecological Science
关键词
沉积物
重金属
防城港
倾倒区
生态风险评价
marine sediment
heavy metal
Fangchenggang
dumping area
assessment of potential ecological risk
