胶州湾东岸表层沉积物重金属污染研究

The assessment of heavy metal pollution for the sediments of Jiaozhou Bay

本文采用地质累积指数法和潜在生态危害指数法,对胶州湾东岸表层沉积物重金属污染状况进行了评价。结果显示,表层沉积物重金属形成污染。不同区域污染程度依次为:海泊河口>湖岛>团岛≈娄山河口>李村河口>中沙礁;各重金属的富集顺序为:Zn>Cu>Pb>Cd。其地积累指数Igeo值介于1～4,属中等污染到严重污染。胶州湾基本不存在As污染。沉积物重金属生态危害指数RI大多介于100～300间,属中等危害,海泊河口接近600危害很强。重金属潜在生态危险性顺序为Cd>Pb>Cu>As>Zn。

Potential ecological risk （RI） and Geoaccumulation index （Igeo） were aphed lor heavy metal pollution assessment in Jiaozhou Bay. The results showed that the middle level pollutions were existed in Jiaozhou Bay. The Igeo indexes were from 1 to 4 and RI values were mostly between 100-300. A higher RI value of about 600 was appeared in the sediments of Haipo River estuary, which showed a comparatively heavier pollution exist there. The consequence of potential ecological risk for heavy metals was Cd〉Pb〉Cu〉As〉Zn.