某水源地补给区地下水健康风险评价研究

Groundwater Health Risk Assessment in a Water Source Recharge Area

采用国内外通用的地下水健康风险评价模型,对某水源地补给区地下水进行健康风险评价。通过对地下水水质的全指标进行检测,最终确定7项具有潜在风险的评价指标。评价结果表明评价区地下水致癌风险和非致癌风险均主要通过口服饮用途径获得。14个点位致癌风险等级在Ⅲ级到Ⅳ级,非致癌风险值均远远大于1,风险较大。评价区地下水非致癌风险的污染物贡献率为NO-3>As>F->Cr6+>Hg>苯>NO-2;评价区地下水的致癌风险的污染物贡献率为As>Cr6+>苯;评价区地下水存在一定健康风险,长期饮用会对人体健康造成危害,作为水源地补给区,会对水源地水质产生影响,其中儿童和女性所面临的健康风险要高于男性。

Adopting a common groundwater health risk assessment model at home and abroad,this paper conducts a health risk assessment of groundwater in a recharge area of a water source.Through the testing of the full indicator of groundwater quality,seven potential risk assessment indicators were finalized.The evaluation results show that:the cancer risk and non-carcinogenic risk of groundwater in the assessment area are mainly obtained through oral drinking.The 14-point carcinogenic risk level is from grade III to grade IV,and the non-carcinogenic risk values are far greater than 1,with a greater risk.The pollutant contribution rate of non-carcinogenic risk of groundwater in the assessment area is NO-3>As>F->Cr6+>Hg>Benzene>NO-2.The pollutant contribution rate of the cancer risk of groundwater in the assessment area is As>Cr6+>Benzene.Groundwater in the assessment area has certain health risks.Long-term drinking will cause harm to human health.As a water source recharge area,it will have an impact on the water quality of the water source,and children and women face higher health risks than men.