基于地统计学的某煤化工场地土壤中汞的分布及人体健康风险评价

The distribution of mercury in the soil of a coal chemical plant area and human health risk assessment based on geostatistics

  • 摘要: 为加强我国煤化工厂区汞污染的防治,本研究以地统计学为研究手段,选择我国西北某 煤化工厂汞污染场地为研究对象,分析厂区汞的分布情况,并进行人体健康风险评价。 研究表 明:煤化工厂区土壤汞含量平均为0*092mg/kg,为当地背景值的4*4倍,呈现明显富集现象;联 合非致癌风险以口摄入为主,风险平均值为0*093,对人体健康暂不构成威胁。 从厂区风险分布 图可以看出,风险中心区域位于动力单元及其西南侧,呈椭圆状并向四周逐步扩散,说明煤化工 汞污染场地的风险防范重点在燃煤烟气的控制。

     

    Abstract: In order to strengthen the prevention and treatment of the mercury pollution in a coal chemicalplantareainChina,thegeostatisticswasusedtoanalyzethedistributionofmercuryinacoal chemicalplantinNorthwestChinaandtoassessthehumanhealthriskaccordingly* Theaveragemercu⁃ rycontentinthesoilofcoalchemicalplantwas0*092mg/kg,whichwas4*4timeshigherthanthelo⁃ calbackgroundvalue,andpresentedanobviousenrichmentphenomenon* Duetothenoncarcinogenic riskmainlythroughmouth,theaveragevalueof0*093couldnotbethreateningtothehumanhealth* Theriskdistributiondiagramofthechemicalplantdemonstratesthattheriskcentralarealocatedatthe southwestofthepowerunit,whichfeaturedasanellipseshapeanddiffusedbygradesfromthecenter* Itillustratesthatthecontrolofthecoal⁃firedfluegasisthekeytothepreventionofthepollutioninthe coalchemicalplantarea*

     

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