红枫湖沉积物中汞污染评价

An Assessment of Mercuury Pollution in Sediments of Hongfeng Lake

为了解红枫湖沉积物中汞的污染现状,采集了红枫湖10个不同点位的沉积物,用冷原子吸光度法测定了的沉积物(干)中总汞含量。以贵州省土壤中金属元素的背景值为评价标准,计算出每个点处汞的潜在生态危害系数。结果显示:红枫湖沉积物受到了不同程度的汞污染,沉积物中的汞含量为背景值的1.32～5.29倍,污染最严重处是侗寨,其潜在生态危害系数高达247.57,属于严重污染,污染最小处是方家庄,其潜在生态危害系数为57.8,属于中等污染。红枫湖沉积物受到不同程度的汞污染。

In order to know the ststus of mercury pollution in sediments of Hongfeng lake, the total mercury content of ten different monitoring points were determined by cold - vapor atomic absorption method. The potential ecological risks of each poins were calculated with the background value standard of mercury. The results showed that the sediments of Hongfeng lake were polluted to different degrees, which were 1.32 - 5.29 times that of the background value, the most polluted point is Dongzhai, whose potential ecological risk reached 247.57, the lest was Fangjiazhuang with 57.8 of ecological risk. The total mercury cement of the sediments of Hongfeng lake is high, and the potential ecological risk is grave.