典型石油化工区域地下水环境质量评价

Quality Assessment of Groundwater in Typical Petrochemical Area

石油化工引发系列地下水环境和健康问题,本文监测典型区域地下水质并评价健康风险,以支撑环境修复和饮水健康。某典型石油化工区域,地下水质综合评价较差:Fe和Mn问题突出,94.1%和88.2%点位超标,污染指数达到10.4和4.71;溶解性总固体、总硬度和F^-需关注,污染指数为1.04~1.21;苯系物、Pb、Cd、Zn、Hg和NO3^-浓度较低,单项污染指数均小于1。相关性分析显示,有机物多受点源影响;金属或阴离子受水文地质影响较强,与井深相关弱,Mn和Hg、As和Se、F^-和Cl^-、F^-和总硬度间存在相伴或竞争关系。

Petrochemicals cause a series of groundwater environmental and health problems.In this paper,groundwater quality in typical areas is monitored and health risks are evaluated to support environmental remediation and drinking water health.In a typical petrochemical area,the comprehensive evaluation of underground water quality is poor:iron and manganese problems are prominent,94.1% and 88.2% exceed the standard,the pollution index reaches 10.4 and 4.71.The total solid solubility,total hardness and fluoride should be paid attention.The pollution index is 1.04~1.21.The concentrations of benzene series,lead,cadmium,zinc,mercury and nitrate were low,and the single pollution index was all less than 1.The correlation analysis showed that organics were mostly affected by point sources.Metals or anions are strongly influenced by hydrogeology and weakly correlated with well depth,there are concomitant or competitive relationships between manganese and mercury,arsenic and selenium,fluoride and chloride,fluoride and total hardness.