摘要
以吉林省某垃圾填埋场地下水为研究对象,监测其中的有机污染物,并进行风险评价。结果表明:(1)有机污染物总计检出18种,5种检出率大于50%。其中,三氯甲烷检出率最高,达到85.7%,质量浓度高达0.217mg/L,超过《生活饮用水卫生标准》(GB 5749—2006)限值(0.06mg/L)。(2)地下水污染指数表明,10种有机污染物具有高淋溶迁移性。(3)以三氯甲烷为典型污染物,14个采样点中,非致癌风险指数均未超过1,12个采样点致癌风险指数超过10~(-6),不在可接受范围。主要暴露途径为饮水摄入。
One of the landfills in Jilin province was taken as the object.Monitoring of organic pollutants and risk assessment were completed.The results showed that:(1)18 kinds of organic pollutants were detected,the detection rate of 5 organic pollutants was more than 50%.The highest detection rate of trichloromethane was 85.7%.And the mass concentration of trichloromethane in the landfill was as high as 0.217 mg/L,which exceeding the limit of"Hygienic standard for drinking water"(GB 5749-2006)(0.06 mg/L).(2)It was showed that 10 kinds of organic pollutants were high leaching mobility with Groundwater Pollution Index.(3)The trichloromethane was selected as the target pollutant.For the 14 monitored points,none of non-carcinogenic risk index was more than 1,but the carcinogenic risk index of 12 sampling points was more than 10~(-6),which was not within the acceptable range.The main route of exposure was drinking water.
引文
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