莆田市主要饮用水源水质健康危害风险度评价

Health Risk Assessment of the Main Drinking Water Sources of Putian

为给莆田市饮用水源水质风险管理提供参考,采用美国环保局推荐的水环境健康风险模型对莆田市主要饮用水源地——东圳水库水质健康进行初步评价,分析各类污染物的风险度。结果表明,东圳水库水中化学致癌物所导致的健康风险度远超过非致癌化学污染物,水质总健康危害风险度超过国际辐射防护委员会(ICRP)推荐的最大可接受值5.0×10^(-5)a^(-1)。化学致癌物中优先控制污染物为Cr^(6+),非致癌性化学污染物应优先控制氟化物和氨氮等。结论确定了东圳水库水质的风险度水平、污染物的主次以及治理的优先顺序。

Health risk assessment model of water environment from USEPA was used to evaluate the water quality of the main drinking water sources of Putian-Dongzhen Reservoir. The risk degree of different pollutants were calculated in this paper. The results showed that： the water quality healthy risk degree of chemical carcinogen was higher than that of noncarcinogen chemical pollutants in Dongzhen Reservoir. The total water quality healthy risk degree was higher than the maximum acceptable degree 5.0×10^-5a^-1 which was recommended by ICRP. Cr^6＋ should be controlled preferentially in chemical carcinogen. Pb and fluorid should be controlled preferentially in noncarcinogen chemical pollutant. The conclusion determined the water quality healthy risk degree of Dongzhen Reservoir. And it revealed the importance of each pollutant and the control priority of the pollutant, is valuable for the management of drinking water quality in Putian.