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采用修正综合指数法(MCD)对秦皇岛近岸海域沉积物重金属的污染状况进行了分析评价,并采用潜在生态危害指数法对沉积物中重金属的潜在生态危害进行评价。结果表明:重金属的平均含量依次是Cu>Pb>As>Cd>Hg,其中Cu和Hg的含量分别超出环境背景值的64.23%和135.52%;研究区沉积物重金属污染程度总体处于很低-低等级,潜在危害风险处于轻度偏高至中等偏低等级,Hg是主要的潜在危害重元素。并根据评价结果提出了相应的防治措施建议。
The pollution of sediment heavy metals in the offshore area of Qinhuangdao was analyzed and evaluated by the modified comprehensive index method (MCD), and the potential ecological risk index was used to evaluate the potential ecological risk of heavy metals in the sediments. The results showed that the average contents of heavy metals were Cu> Pb> As> Cd> Hg, and the content of Cu and Hg exceeded 64.23% and 135.52% respectively of the background value. The heavy metal pollution in the sediment of the study area was low - low Hg is the major potentially hazardous heavy element, with potentially hazardous risks at mild to moderate levels. According to the evaluation results, the corresponding prevention and control measures are put forward.