饮用水水源水质健康风险评价及对策

Water quality health risk assessment and counter-measure for drinking water source

采用水质健康风险评价模型,对佛山主要水源——北江多年来的水质监测资料进行了分析和评价。结果表明:北江流域水质健康总风险值较高;水质健康风险沿北江先增大后又有所下降,最高值出现在主城区河段。基因毒物质是造成北江水质健康风险值高的主要污染物质,其中Cr的健康风险值最高,其次为As和Cd。对于躯体毒物质,主要风险来源于Hg、Pb、NH3三种污染物;氨的风险值呈增加趋势,2004年以后取代Hg成为主要的躯体毒物质风险源。针对北江水源的水质健康风险特点,提出了相应对策。

The model of water source risk assessment was applied to Beijiang River,which is one of the main water sources in Foshan city.Results indicate that total pollution risk value of the River is at a high level.The pollution risk increases first and then decreases along the River,the maximum value appears in city area.Genetic toxic substances are the main pollutants,especially Cr,and then As and Cd.For non-genetic toxic substances,the risk is caused mainly by Hg,Pb,and NH3.The risk value of NH3 indicates an increasing tendency these years.After 2004,NH3 replaced Hg as the major pollutant.According to the summarized characteristics of the River,countermeasures are proposed.