岩溶地下河中HCHs和DDTs的分布特征与健康风险评价  

Distribution and health risk assessment of HCHs and DDTs in underground river of karst,Southwest China

作　　者：胡英[1] 祁士华[1] 兰兰[1] 张婉珈[1] 齐书蕾[1] 

机构地区：[1]中国地质大学生物地质与环境地质教育部重点实验室,湖北武汉430074

出　　处：《中国环境科学》2010年第6期802-807,共6页China Environmental Science

基　　金：西南岩溶石山地区重大环境地质问题及对策研究(1212010813111)

摘　　要：为研究岩溶地区水环境中有机氯农药对人体健康产生的潜在危害风险,对广西、云南、重庆和贵州地下河中的HCHs和DDTs进行了检测,并应用水环境健康风险评价模型对其进行了健康风险的评价.结果表明,HCHs在广西、云南、重庆和贵州的岩溶地下河中的含量平均值分别为3.39,4.60,15.18,19.06ng/L;DDTs在相应地区的平均浓度分别为1.36,3.01,13.41,15.05ng/L.从HCHs和DDTs的组成特征来看,云南、广西HCHs主要由早期残留引起,重庆和贵州部分地区存在新的输入源;云南和贵州DDTs可能是既往施用史形成,广西及重庆则可能存在新的污染源.通过健康风险评价模型计算,研究区地下河中的有机氯农药对人体造成的健康风险危害处于较低水平.To explore the potential healthy hazards oforganochlorine pesticides in the karst areas, HCHs and DDTs from underground rivers of Guangxi, Yunnan, Chongqing and Guizhou were detected, and health risks associated with these organic pollutants were assessed primarily by an assessment model of water environmental health risk. The average concentrations of HCHs in Guangxi, Yunnan, Chongqing and Guizhou were 3.39, 4.60, 15.18, 19.06ng/L, respectively; and the averaged concentrations of DDTs in the these regions were 1.36, 3.01, 13.41, 15.05ng/L, respectively. Distribution characteristics of HCHs and DDTs isomers suggested the HCHs of Yunnan and Guangxi were mainly from the early residue,while there were still some fresh inputs at most sections in Chongqing and Guizhou;for DDTs, in Yunnan and Guizhou,there were result of history using probably,while in Guangxi and Chongqing,there may be some new some. Based on the model of water environmental health risk assessment, the health risk caused by organochlorine pesticides was low in the studying area.

关 键 词：岩溶 地下河 有机氯农药 健康风险评价 

分 类 号：X142[环境科学与工程—环境科学]