淮南潘一矿采煤塌陷积水区水环境健康风险评估

Health risk assessment of water environment of coal mining subsidence area in Panyi coal mine of Huainan

  • 摘要: 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。

     

    Abstract: Waterlogged area in coal field is of great importance for the health of local residents. In this paper, heavy metals (Cr,Cd,Zn,Cu,Pb,Ni and Fe)from 12 water samples in mine subsidence area were monitored in Panyi coal mine of Huainan. The human health risk caused by heavy metals through the ingestion ways were evaluated and analyzed using the water environmental health risk assessment model recommended by USEPA. It has been found that the carcinogenic risk values in the water body of the study area were between(5.06~8.06)×10-6/a, according to the health risk standards recommended by the Ministry of Environmental Protection of China, there is a health risk in the water body of the study area. Among them, the carcinogenic risk of Cr accounted for 98.52% of the total carcinogenic risk. Non-carcinogenic health risk values were around 10-10/a, the health risk is not obvious, and the contribution of non-carcinogenic health risk was the order of Cu > Pb > Fe > Cr > Cd > Ni > Zn. Among them, Cu had the largest contribution, accounting for 48.62% of the total non-carcinogenic risk value. At the same time, research results also indicated that the carcinogenic risk in the study area constituted 99.99% of the total health risk, indicating that the total health risk essentially consisted of carcinogenic risk, and carcinogenic risk was almost consisted of Cr.

     

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