黄浦江上游周边农田土壤、蔬菜及道路灰尘中汞的累积

MERCURY ACCUMULATION IN SOIL,VEGETABLE AND ROAD DUST IN UPPER REACH OF HUANGPU RIVER BASIN

对黄浦江上游周边环境介质中总汞的含量进行了研究,并对环境介质中Hg的空间分布、累积特征及环境效应进行了分析.结果表明:黄浦江上游周边土壤及道路灰尘中Hg的平均含量分别为332.06ng.g-1和226.62 ng.g-1,分别是国家土壤质量标准(GB 15618-1995)中所规定的集中式生活饮用水源地土壤质量标准的2.21倍和1.51倍;蔬菜(豇豆)中Hg的平均含量为15.98 ng.g-1,超出国家标准(GB2762-2005)中规定的限量值;黄浦江北岸环境介质中Hg的平均含量均大于黄浦江南岸;环境介质中Hg的累积主要源于工业污染和生活垃圾的输入,交通污染对Hg的累积无明显的贡献作用;土壤中的Hg是黄浦江饮用水源地水环境中Hg的直接来源之一.

This study examined the total mercury concentrations in soil,vegetable and road dust,and the spatial distribution of the total mercury in the water sources area in upper reach of Huangpu river basin.The environmental effect of mercury accumulation in soil was also studied.The average total mercury Concentration for soil and road dust samples were 332.06 ng·g^-1,226.62 ng·g^-1 respectively,which were higher than the maximum value（150 ng·g^-1） of environmental quality for soils in water sources area.The average content of mercury in V.sesqulped.tis was 15.98 ng·g^-1,which was 1.6 times of the maximum level of mercury（10 ng·g^-1） in foods.The average contents of mercury in soil,road dust and V.sesqulped.tis in north part of Huangpu river basin were higher than those from the southern part.Mercury accumulation in the environmental media was induced by the pollution of industry and domestic garbage,and the pollution caused by traffic did not contribute to the accumulation of mercury significantly.Mercury in water in upper reach of Huangpu river basin was probably from soil.