乌鲁木齐乌拉泊水库水体中重金属健康风险评价

为了解乌鲁木齐市主要饮用水源地乌拉泊水库水体中重金属含量,特对此进行了调查研究,并应用美国环保局(USEPA)推荐的健康风险评价模型对其进行健康风险的初步评价。结果表明,乌拉泊水库由致癌物质Cr、As、Cd通过饮水途径引起的个人年健康风险值表现为CrAsCd,风险值为10-7~10-5a-1,Cr的风险值高于国际放射防护委员会(ICRP)的推荐值(5×10-5a-1),成为乌拉泊水库水体的主要致癌因子;乌拉泊水库由非致癌物Pb、Cu、Zn、Hg所引起的健康危害的个人年风险以Cu为大,Pb次之,Hg和Zn较小,风险水平为10-10~10-8a-1,远低于ICRP和USEPA推荐的最大可接受风险水平。

Health Risk Assessment of Water Quality at Wulabo Reservoir in Urumqi City

Wulabo reservoir was main drinking water source in Urumqi city, its concentration of heavy metal were analyzed and estimated by health risk evaluation modal that recommended by USEPA. Result showed individual health risk value every year was affected by carcinogen including Cr, As, Cd, influencing degree was Cr〉 As〉 Cd, risk value were 10^-7～10^-5a^-1, risk value of Cr was higher than recommended value （5×10^-5a^-1） of ICRP, it was main carcinogen in Wulabo reservoir. Individual health risk value every year was affected by not carcinogen including Pb,Cu,Zn,Hg, influencing degree of Cu was the most high, Pb was more higher, Hg and Zn were lower, its risk level were 10^-10～10^-8a^-1, that was under ultimate acceptable risk level which was recommended by ICRP and USEPA.