辽河流域高氟地区氟对人体健康的影响

研究了辽河流域高氟地区土壤、作物、饮用水中氟含量，并应用目前美国环保局推荐的健康风险评价模型对辽河流域高氟地区饮用水中氟所引起的健康风险进行初步评价。研究表明：研究区饮用水中氟质量浓度为0．70—4．51mg·L^-1；白菜根土中氟质量分数为182—484mg·kg^-1，萝卜根土质量分数为182～352mg·kg^-1，玉米根土中氟质量分数为209～1254mg·kg^-1；白菜可食部分氟质量分数为0．51～2．96mg·kg^-1，萝卜可食部分氟质量分数为0．34～0．50mg·kg^-1，玉米果实部分氟质量分数为0．88～1．04mg·kg^-1。通过饮用水、食物途径所致健康风险中，食人途径、饮用水途径非致癌物年健康风险分别为1．920×10^-9·a^-1，1．960×10^-8·a^-1，均低于国际辐射防护委员会（ICRP）推荐的通过饮水途径最大可接受风险水平（5×10^-5·a^-1）。

Fluorine contents its health risks assessment in Liaohe River basin, China

Fluorine levels of soil, crops and drinking water fluorine contents were investigated to understand the fluorine levels in the environment medias in the Liaohe basin, China, and the possible health risks of fluorine to human were assessed using the model recommended by the EPA. Fluorine contents varied from 0.70 to 4.51 mg·L~(-1) in the drinking water; from 182 to 484 mg·kg~(-1) in the Chinese cabbage root soil; from 182 to 352 mg·kg~(-1) in the radish root soil; and from 209 to 1 254 mg·kg~(-1) in corn root soil; respec-tively. In vegetable edible parts and corn, fluorine contents varied from0.51 to 2.96 mg·kg~(-1) in Chinese cabbage; from 0.34 to 0.50 mg·kg~(-1) in radish; and from 0.88 to 1.04 mg·kg~(-1) in corn; respectively. The health risk assessment showed the carcinogenic risks of fluorine through drinking water and eating food were 1.920×10~(-9)·a~(-1) and 1.960×10~(-8)·a~(-1), lower than 5×10~(-5)·a~(-1), which is the maxi-mum allowance levels recommended b ICPR.