沙颍河沿岸距离不同两村居民饮用水健康风险评价

Health Risk Assessment for Drinking Water in Two Villages along the Shaying River

目的对与沙颍河沿岸距离不同的两村庄饮用水进行健康风险评价和比较。方法在对两村庄饮用水主要污染物测定的基础上,初步利用健康风险评价方法评价污染物通过饮用水途径所致的健康风险。结果两村饮用水中致癌物质引起的健康危害个人年风险均表现为Cr^(6+)>As>Cd,Cr^(6+)、As的人均致癌年风险均高于最大可接受风险水平5.0×10^(-5)/a;两村躯体毒物质引起的健康危害个人年风险大小表现为F^->Pb>Hg>CN^->NH_3-N>挥发酚,均超过最大可接受风险水平10^(-6)a,F^-为主要的风险因子。结论两村居民饮用水均存在健康风险,白果村饮用水健康风险略高于洪山村,可能因其地理位置离沙颍河较近所致。

Objective The health risks of drinking water in two villages at different distances from Shaying river were preliminary evaluated and compared. Method Based on the detection of major pollutants in drinking water, health risks induced by drinking water pathway were preliminary evaluated by health risk models. Results The health risks of drinking water in the two villages caused by carcinogens were ranked as CrS＋〉 As〉 Cd. The risk values of Cr~ and As were higher than the maximum acceptable levels recommended by ICRP（5.0 x 10-5/a）. The health risks caused by non carcinogens were ranked as F-〉 Pb〉 Hg〉 CN-〉 NH3-N〉 volatile phenols, exceeding the maximum acceptable levels （ 10-6/a）, and F-is the major risk factor. Conclusion The health risks of drinking water in the two villages existed, and the health risk value of drinking water in Baiguo village were appreciably higher, it is possibly due to its shorter distance to Shaying river.