摘要
以赣州稀土矿区周边地表水为研究对象,分析水体中污染物的分布特征,通过修正的内梅罗指数法和健康风险评价模型对地表水体进行水质评价和健康风险评估。结果表明:1)稀土矿区周边水体污染物平均浓度的大小顺序为硫酸盐>硝酸盐>铅>镉>铬,最大超标率达52.63%,最大超标倍数12.2倍,主要集中在龙南、寻乌稀土矿开采区,污染物浓度随迁移距离的增加而减小,河流上游地区污染物浓度大于下游地区。2)污染物铅与镉、硫酸盐相关系数分别为0.88、0.95,表明这三种污染物具有相似的污染源及类似的迁移转化过程,铬与铅、镉及硫酸盐之间相关性分别为-0.31、-0.21、-0.29,表明铬与铅、镉及硫酸盐来源不同或相互抑制,硝酸盐与铅、镉及硫酸盐之间相关性分别为0.073、0.22、0.31,说明硝酸盐与其他污染因子具有多源性。3)成人健康风险强度为硝酸盐>铅>硫酸盐>铬>镉,儿童健康风险强度为铅>硝酸盐>硫酸盐>铬>镉,非致癌污染因子所引起的成人和儿童的健康风险值相较于致癌污染因子风险值高出2~5个数量级,主要由铬和镉引起,研究区儿童总健康风险值高于成人。
The surface water around Ganzhou rare earth mining area was taken as research object, and the distribution characteristics of pollutants in water were analyzed.The water quality evaluation and health risk assessment of surface water were carried out through modified Nemerow index method and health risk assessment model.The results show that: 1)The average concentration sequence of pollutants in surrounding water of the rare earth mining area is in the order of sulfate, nitrate, lead, cadmium, and chromium, with the maximum exceeding rate of 52.63% and the maximum exceeding multiple of 12.2 times, which are mainly concentrated in the mining areas of Longnan and Xunwu rare earth mines.The concentration of pollutants drops with the increase of migration distance, and the concentration of pollutants in the upstream area of the river is higher than that in the downstream area.2)The correlation coefficient between lead and cadmium, sulfate is 0.88 and 0.95,respectively, indicating that these three pollutants have similar pollution sources and similar migration and transformation processes.The correlation coefficient between chromium and lead, cadmium and sulfate is-0.31,-0.21 and-0.29,respectively, indicating that chromium and lead, cadmium and sulfate sources are different or mutual inhibition.The correlation coefficient between nitrate and lead, cadmium and sulfate is 0.073,0.22 and 0.31,respectively, indicating that nitrate and other pollution factors has multi-source.3)The health risk intensity sequence of adults is nitrate, lead, sulfate, chromium, and cadmium, and that of children is lead, nitrate, sulfate, chromium and cadmium.The health risk value of adults and children caused by non-carcinogenic pollution factors is 2—5 orders of magnitude higher than that of carcinogenic pollution factors, mainly caused by chromium and cadmium.The total health risk value of children in the study area is higher than that of adults.
作者
陈仁祥
张博
宋勇
马文洁
高柏
CHEN Ren-xiang;ZHANG Bo;SONG Yong;MA Wen-jie;GAO Bai(Jiangxi Nuclear Industrial Geology Bureau Nonferrous Corps,Ganzhou 341000,Jiangxi,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2022年第12期124-133,共10页
Nonferrous Metals（Extractive Metallurgy)
基金
江西省重点研发计划项目(2018ACG70023)
核资源与环境国家重点实验室开放基金资助项目(2020NRE18)。
关键词
重金属
硫酸盐
硝酸盐
空间分布
健康风险
heavy metals
sulfate
nitrate
spatial distribution
health risk
