摘要
采用原子荧光光谱法对长江镇江段水体及水生生物中的汞含量进行测定,分析了长江镇江段水体和水生生物中汞污染现状以及汞的含量分布状况,并采用单项污染指数法对其生态风险进行评价。结果表明:长江镇江段8个采样点的水体中汞含量的平均值为0.014μg/L,均低于《地表水环境质量标准》第Ⅱ类标准(≤0.05μg/L),表明水体均未受到明显的汞污染;水生生物样品(螺蛳、河蚌和鲫鱼)的汞含量均低于中国《农产品安全质量无公害水产品安全要求》(≤300μg/kg)。
In this study, mercury contents in water and aquatic organisms in Zhenjiang section of Yangtze River weredeterminedby atomic fluorescence spectrometry.Pollution status and spatial distribution of mercury in the water and aquatic organisms at the Yangtze River were analyzed in this paper. Single Pollution Index was used to assess ecological risksof mercury. The results showed that in 8 sampling spots, the average contentof mercury in water was 0.014 μg/L. The mercury concentrations in aqueous phase were lower than the secondary-level standard of the National Surface Water Environment Quality Standard(≤0.05 μg/L). Mercury contents in aquatic organisms(Snails, river mussels and crucian carp)were all lowerthan the criteria for Agricultural Product-Safety Standards for Non-Pollution Aquatic Products of China(≤300 μg/kg).
引文
[1]鲁长娟,郭娜,张菊,等.东平湖湖水汞砷形态赋存特征及健康风险评价[J].环境与健康杂志,2017,34(5),423-426.
[2]李法松,韩铖,林大松.安庆沿江湖泊及长江安庆段沉积物重金属污染特征及生态风险评价[J].农业环境科学学报,2017,36(3):574-582.
[3]李嗣新,胡菊香,池仕运,等.汞在新建水库食物网中生物累积与风险评价研究进展[J].生态学报,2016,36(5):1232-1234.
[4]尹肃,冯成洪,李扬飏,等.长江口沉积物重金属赋存形态及风险特征[J].环境科学,2016,37(3):917-924.
[5]方国华,袁婷,林榕杰.长江江苏段饮用水水源地生态风险评价[J].水资源保护,2018,34(6):12-16.
[6]杨洋,黄婉玉,程星.万峰湖水体和沉积物中汞的污染现状及风险评价[J].环保科技,2015,21(2):19-23.
[7]胡良锋,王永花,王秋英,等.北太湖水、沉积物及典型水生生物样品汞的分布特征与生态风险评价[J].农业环境科学学报,2014,33(6):1183-1188.