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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。
The contents of Cu, Zn, Pb, Cd, Cr, Hg, As in 486 surface sediments in the western shelf area of the South Yellow Sea were measured. The sediment quality was evaluated according to the marine sediment quality standard. The contents of heavy metals Hg, Cd, Pb and Zn in the surface sediments are all lower than the highest standards of the first class of sediments stipulated by the national standard. The contents of Cr, Cu and As in the surface sediments are also lower than those of the national standard in most areas The highest standard of material is only the second type of sediment area in the local area. The potential ecological risk index method was used to evaluate the heavy metal pollution. The results showed that the main heavy metal pollution factors in As surface sediments were As and As, and the single station was characterized by medium single factor pollution. Only one station of Cr was a medium single station in the study area Factor pollution, other heavy metals are low single-factor pollution, low total pollution of heavy metals. In addition, the potential ecological risk of heavy metals in the study area is low, and the total potential ecological risk is low.