福建定海湾表层沉积物中重金属生态评价初步研究

Study on ecological assessment of heavy metals in surface sediments of Dinghai bay in Fujian

2006年8月对定海湾表层沉积物中重金属(Hg、Cu、Cd、As及Pb)的监测结果:所研究的各重金属含量均达到一类海洋沉积物质量标准;利用潜在生态危害指数法对其进行评价,所研究的各重金属污染系数较低,对水域均只具有低潜在生态风险;而且,所研究重金属的总污染系数较低,总潜在生态危害指数也较低。因此,这次的监测结果表明定海湾内表层沉积物总体质量状况良好。不过,通过比较分析,定海湾内表层沉积物质量仍受到其临近河流(闽江与敖江)所携带的重金属入海污染物一定影响。

The monitor of heavy metals （Hg, Cu, Cd, As, Pb） in surface sediments of the Fujian Dinghai Bay was carried out in Aug. 2006. The results showed that the contents of the heavy metals were the first-class standard of the marine sediment quality. The contents were analyzed and the assessment of the potential ecological hazards was made using the Lars Hakanson Index Method. The individual pollution parameter and parameter of the potential ecological risk were low. The integrated pollution index and potential ecological risk were low too. Therefore, the surface sediment quality in the Dinghai Bay was good as a whole. But through the comparison and analysis, it was influenced by the heavy metal pollutants carried by the rivers of Minjiang and Aojiang nearby.