长江九江段水质公众健康危害评价

Public Health Risk Assessment on Water Quality of Jiujiang Reach in the Yangtze River

应用相应的数学模式分别计算了长江九江段水质的放射性污染物、化学致癌物、非致癌污染物对公众健康的危害．结果表明：长江九江段饮用水源经饮水途径所致危害个人危险为３．９９×１０－５ａ－１，未超过国际辐射防护委员会（ＩＣＲＰ）最大可接受值５×１０－５ａ－１，为可接受水平．危害作用最大的污染物是Ｃｒ６＋ｒ和Ａｓ．群体年危险为１２．６８人·ａ－１，危害程度是：化学致癌物＞放射性污染物＞非致癌性污染物．

Public health risk assessment on water quality of Jiujiang reach in the Yangtze River is carried out in this article. The risk of radiative pollutants, chemical carcinogens and non-chemical carcinogens to public health risk is caculated by different mathmatical models. The results show that the personal risk is 3.99×10 -5 ·a -1 which don't surpass the ICRP's level of 5×10 -5 and the group annual risk is 12.68 persons/a by way of drinking water in Jiujiang Reach inthe Yangtze River. The most harmful pollutants are Cr 6+ and As.Harmful extent is chemical carcinopens>radiative pollutants>non chemlcal carcinogens.