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以淮南潘一矿塌陷积水区为例,分析测试了塌陷积水区12个采样点水样中的7种重金属元素(Cr、Cd、Zn、Cu、Pb、Ni和Fe)的含量,采用美国环保局(USEPA)推荐的水环境健康风险评价模型,对重金属由食入途径进入人体所引起的健康风险进行评估和分析。研究发现,研究区水体中重金属致癌风险值为(5.06~8.06)×10~(–6)/a,根据我国环境保护部推荐的健康风险标准,存在健康风险。其中,Cr的致癌风险占总致癌风险的98.52%。非致癌健康风险值在10~(–10)/a的数量级,健康风险不明显,而非致癌健康风险的贡献大小顺序为,Cu>Pb>Fe>Cr>Cd>Ni>Zn。其中,Cu的贡献率最大,占非致癌总风险值的48.62%。同时还发现,研究区的重金属致癌风险占总健康风险的99.99%,这表明该区域总的水质健康风险几乎全部由致癌风险构成,而致癌风险中又几乎由Cr组成。
Taking the subsidence area of Panyi mine in Huainan as an example, the contents of seven heavy metal elements (Cr, Cd, Zn, Cu, Pb, Ni and Fe) in 12 sampling points in the subsided water area were analyzed and tested. The US Environmental Protection Agency (USEPA) recommends a water environment health risk assessment model that evaluates and analyzes the health risks of heavy metals entering the human body from the ingestion pathway. The study found that the value of carcinogenic value of heavy metals in water was (5.06 ~ 8.06) × 10 ~ (-6) / a. According to the health risk standards recommended by China’s Ministry of Environmental Protection, health risks exist. Among them, the carcinogenic risk of Cr accounted for 98.52% of the total carcinogenic risk. The non-carcinogenic health risk value is in the order of 10 -10 / a, the health risk is not obvious, but the non-carcinogenic health risk contribution order is Cu> Pb> Fe> Cr> Cd> Ni> Zn. Among them, the contribution rate of Cu is the largest, accounting for 48.62% of the total non-cancer risk. It was also found that the carcinogenic risk of heavy metals in the study area accounted for 99.99% of the total health risk, indicating that almost all of the water quality and health risks in the region are constituted by the carcinogenic risk, while the carcinogenic risk is almost composed of Cr.