摘要
研究了全黄河范围内40个国家重点控制断面岸边土壤样品中类二噁英类多氯联苯(dioxin-like polychlorinated biphenyls,DL-PCBs)的污染现状,并利用毒性当量法和健康风险评价模型定量描述黄河岸边土壤中DL-PCBs对沿岸居民的毒性风险、致癌风险和非致癌风险.结果表明,黄河岸边土壤中各采样断面岸边土壤中ΣDL-PCBs的含量(以dw计,下同)范围为:0.37~7.17 ng·g^(-1),均值为0.38 ng·g^(-1).毒性风险计算表明,黄河岸边土壤中DL-PCBs的毒性当量范围为:0.00~30.31 pg·g^(-1),均值是13.63 pg·g^(-1),基本不会对沿岸居民产生毒性风险;健康风险模型计算表明,黄河岸边土壤中DL-PCBs对儿童和成人的致癌风险、非致癌风险均未超过美国EPA规定的限值,基本不会产生明显的健康风险.相比而言,黄河中游沿岸居民更易受到DL-PCBs危害.
The concentration levels,toxic equivalency（TEQ） concentrations,and carcinogenic and non-carcinogenic risks of dioxinlike polychlorinated biphenyls in shore soil from the 40 national key monitoring sections along the entire Yellow River were comprehensively studied.The results showed that the concentrations of Σ DL-PCBs in the soil were between 0.37-7.17 ng·g^-1（dry weight）,and the mean value was 0.38 ng·g^-1（dry weight）.The TEQ concentrations of DL-PCBs in the soil were between 0.00-30.31 pg·g^-1（dry weight）,and the mean value is 13.63 pg·g^-1（dry weight）,posing no significant risk to the ecological environment and human health.The carcinogenic and non-carcinogenic risks of DL-PCBs in this study did not exceed the limits set by the USEPA,and there were no obvious health risks.The residents in the middle reaches of the Yellow River were more vulnerable to DL-PCBs.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第1期123-129,共7页
Environmental Science
基金
北京交通大学基础科研基金项目(2016YJS118)
北京交通大学重点科研基金项目(2016JBZ008)
关键词
黄河
岸边土壤
类二噁英类多氯联苯
风险
the Yellow River
shore soil
dioxin-like polychlorinated biphenyls
risks
