论文部分内容阅读
对环渤海海域表层沉积物中重金属含量进行了测定,分析了重金属元素的分布特征,以及影响重金属元素分布的因素,采用尼梅罗综合指数法对研究区进行了生态评价。结果显示,辽东湾北部海域是环渤海湾3个调查区中重金属污染最严重的区域。其中Cd和Hg超标严重。空间分布特征整体表现为重金属高值区在辽东湾北部西侧小凌河口外及葫芦岛附近海域。由于物源和粒度的影响,Cu、Pb、Zn的高值区具有相似的分布区域。生态评价结果显示研究区内重污染地区主要分布在辽东湾葫芦岛近岸海域。
The contents of heavy metals in surface sediments in the Bohai Sea area were measured. The distribution characteristics of heavy metal elements and the factors affecting the distribution of heavy metal elements were analyzed. The ecological evaluation of the study area was carried out by using Niemero’s comprehensive index method. The results show that the northern part of Liaodong Bay is the area with the most serious heavy metal pollution in the three surveyed areas around Bohai Bay. Which Cd and Hg exceeded the standard serious. The spatial distribution of the whole area is characterized by high value areas of heavy metals outside the Xiaolinghe Estuary and the sea near Huludao in the north of Liaodong Bay. Due to the influence of provenance and grain size, Cu, Pb and Zn high-value areas have similar distribution areas. The results of ecological evaluation showed that the heavily polluted areas in the study area mainly distributed in the coastal area of Huludao in Liaodong Bay.