金州湾表层沉积物污染物时空分布特征及生态风险评价

Temporal-spatial characteristics and ecological risk assessment of pollutants in surface sediment of Jinzhou Bay

利用金州湾海域2013年的沉积物调查数据,对金州湾沉积物中主要污染物含量的分布特征进行分析,并结合2009年和2011年的调查数据分析了2009～2013年主要污染物含量的变化趋势,在此基础上采用标准指数法和潜在生态风险指数法对沉积物污染程度以及潜在生态风险进行评价。结果表明,金州湾表层沉积物典型污染物含量都呈现出南岸高于北岸,湾底高于湾口的特点。2013年Cu、Pb、Cd、Zn、As、有机碳以及硫化物的含量均明显高于2009年和2011年。重金属中Cd、Hg潜在生态风险等级为中等至较高,Cu、Pb、Zn以及As潜在生态风险等级较低。

Temporal-spatial characteristics and ecological risk of pollutants in surface sediment of Jinzhou bay were in- vestigated by data which was obtained from 2009 to 2013. The results show that pollutant concentration in south bank and the bottom of the bay was higher than north bank and the head of the bay. The concentration of Cu,Pb,Cd,Zn, As ,organic carbon and sulfide obtained in 2013 was higher than that obtained in 2009 and 2010. The potential ecologi- cal risk index of Cu, Pb,Zn and As was much less than 40, which implied that those heavy metals had low ecological harm. The potential ecological risk index of Cd and Hg was between 42.3 and 148 ,which implied that the potential ec- ological risk of Cd and Hg was in strong level.