摘要
对南黄海西部陆架区486个表层沉积物中的Cu、Zn、Pb、Cd、Cr、Hg、As进行了化学测试分析,并依据海洋沉积物质量标准对沉积物质量进行了评价,结果表明,表层沉积物中的重金属Hg、Cd、Pb、Zn的含量都低于国标规定的一类沉积物的最高标准;Cr、Cu、As的含量在大部分区域也都低于国标规定的一类沉积物的最高标准,仅在局部区域为二类沉积物区。利用潜在生态危害指数法对重金属污染进行了评价,结果表明:表层沉积物中主要重金属污染因子为As,As在局部站位表现为中等单因子污染,Cr在研究区只有一个站位为中等单因子污染,其它重金属为低单因子污染,重金属总体污染低。另外,研究区各重金属潜在生态危害低,总的潜在生态风险低。
486 surface sediments from the South Yellow Sea were analyzed for heavy metals （Cu, Zn, Pb, Cd, Cr, Hg, As ） . The contamination of the samples were evaluated depending on the standard quality of the marine sediments. The results showed that the content of heavy metals of Hg, Cd, Pb, Zn were lower than the maximal level of the content of first class of the standard quality of ma- rine sediments. The content of heavy metals of Cr, Cu, As in most of the areas were lower than the maximal content of the standard quality of the marine sediments, except the ones from few areas were belonging to the second-class sediments. Potential ecological risk index were employed to evaluate the contamination of surface sediments. The results indicated that As was the main single factor con- tamination, which occurred as intermediate contamination at certain stations. Cr occurred as intermediate contamination only in one station. Other heavy metals occurred as low single factor contamination. In total, The integrated pollution of heavy metals were low in the study area. And besides, the potential ecological risk of each heavy metal and the integrated potential ecological risk were low.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2012年第2期181-185,共5页
Marine Environmental Science
基金
国家自然科学基金项目(40876034)
国土资源部地质调查项目(1212010611401)
关键词
重金属
污染评价
南黄海西部陆架
heavy metals
pollution evaluation
west south Yellow Sea
