辽东湾近岸表层海水重金属污染分析与评价

发布时间：2018-11-07 21:27

【摘要】：根据2013年春季、夏季和秋季对辽东湾近岸表层海水重金属的调查数据,分析了该调查区域海水重金属浓度的季节变化,并运用内梅罗(Nemerow)指数法和综合质量指数法对该海域海水重金属污染状况进行了综合评价。结果显示,辽东湾调查海域表层海水中重金属浓度夏季最高,仅Pb超过第一类海水水质标准,且Pb的站位超标率为66.67%。按照美国国家海洋与大气管理局(National Oceanic and Atmospheric Administration,NOAA)推荐的海水中重金属生物慢性安全浓度下限,仅Cu在个别站位的浓度高于NOAA推荐的生物慢性安全浓度下限,其余所有元素的浓度均未超出,不会对生物体产生显著影响。内梅罗指数法和综合质量指数法评价结果显示,辽东湾调查海域属于清洁轻污染等级,水环境分级属于尚清洁允许级别,重金属污染较重的区域主要有3个,分别是绥中近岸海域、辽东湾北部河口区、复州湾和金州湾近岸海域。
[Abstract]:Based on the survey data of heavy metals in the coastal waters of Liaodong Bay in spring, summer and autumn of 2013, the seasonal variation of heavy metal concentrations in the sea water was analyzed. The pollution status of heavy metals in sea water in this area was evaluated by using Nemero (Nemerow) index method and comprehensive quality index method. The results showed that the concentration of heavy metals in the surface seawater of Liaodong Bay was the highest in summer, only the Pb exceeded the water quality standard of the first kind of seawater, and the rate of Pb exceeding the standard was 66.67. According to the lower limit of chronic safe concentration of heavy metals in seawater recommended by (National Oceanic and Atmospheric Administration,NOAA, only the concentration of Cu at individual stations is higher than that recommended by NOAA. The concentrations of all the other elements remain unchanged and have no significant effect on the organism. The evaluation results of Nemero index method and comprehensive quality index method show that the investigated sea area in Liaodong Bay belongs to the clean and light pollution grade, the water environment classification belongs to the allowable level of clean water, and the heavy metal pollution is more serious in three areas. They are Suizhong inshore, northern Liaodong Bay estuary, Fuzhou Bay and Jinzhou Bay.
【作者单位】：辽宁省海洋水产科学研究院辽宁省海洋环境监测总站;
【基金】：蓬莱19-3油田溢油事故生态补偿项目辽宁省海洋与渔业厅科研项目(201303)共同资助
【分类号】：X55

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