华东某铀矿区稻米中放射性核素铀污染特征及健康风险评价

发布时间：2018-06-08 11:46

本文选题：铀矿区 + 稻米　；参考：《长江流域资源与环境》2017年03期

【摘要】：为查明华东某铀矿区稻米中放射性核素铀污染现状及健康风险问题,测定铀矿区和对照区共136件稻米样品中放射性核素U含量,采用单因子污染指数法评价放射性铀污染,并开展U元素健康风险评价。结果表明:(1)研究区稻米中U含量平均值为1.46 ng·g~( 1),各亚区稻米中U含量平均值从大到小顺序为:开采矿井区水冶场区含矿未采区废弃矿井区江西省背景值对照区;(2)稻米单因子污染指数为1.25,属于轻度污染。其中,开采矿井区和水冶厂区为轻度污染,废弃矿井区和对照区未受污染;(3)首次计算提出江西省大米U元素致癌风险最大斜率系数为1.04×10~3(d·kg)·mg~( 1)。各亚区稻米中成人和儿童致癌风险指数高低顺序均为:开采矿井区水冶厂区含矿未采区废弃矿井区对照区。儿童直接饮食稻米具有一定的致癌风险;开采矿井区和水冶厂区的成人存在一定致癌风险,含矿未采区和废弃矿井区以及对照区均无致癌风险。
[Abstract]:In order to find out the status and health risk of radionuclide uranium contamination in rice in a uranium mine area in East China, the contents of radionuclide U in 136 rice samples from uranium mine area and control area were determined, and the single factor pollution index method was used to evaluate the radioactive uranium contamination. U-element health risk assessment was carried out. The results showed that the average value of U content in rice was 1.46 ng / g ~ (-1) in the study area, and the average value of U content in rice in each subregion was from large to small order: mining area, hydrometallurgical site area, abandoned mine area, Jiangxi province background value control area, Guiguo 2) The single factor pollution index of rice is 1.25, which belongs to light pollution. Among them, the mining mine area and hydrometallurgical plant area are mildly polluted, and the abandoned mine area and the control area are unpolluted. The maximum slope coefficient of U element carcinogenic risk of rice in Jiangxi Province is 1.04 脳 10 ~ (3) ~ 3 ~ (d) d ~ (-1) mg ~ (-1) 路kg ~ (-1) 路min ~ (-1) 路m ~ (-1) ~ (-1) 路m ~ (-1). The order of carcinogenic risk index of adults and children in each sub-region was as follows: mining area, hydrometallurgical plant area, unmined area, abandoned mine area, control area. Children's direct diet rice has certain carcinogenic risk, adults in mining and hydrometallurgical areas have certain carcinogenic risks, and there is no carcinogenic risk in unmined and abandoned mine areas and control areas.
【作者单位】：东华理工大学地球科学学院;东华理工大学核资源与环境教育部重点实验室;
【基金】：国家自然科学基金项目(41261081) 江西省研究生创新基金项目(YC2015-S268) 江西省自然科学基金(2011ZBAB203009)~~
【分类号】：R144

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