典型石油烃污染场地土壤与地下水环境风险评估

Environmental Risk Assessment of Soil and Groundwater in Typical Petroleum Hydrocarbon Contaminated Sites

由于石油烃污染场地有显著不同于其它类型污染场地的特征,故以探讨石油烃类污染场地土壤和地下水环境风险评估一般方法为目的,选取某典型石油烃污染场地,对土壤和地下水进行采样分析,得出了该污染场地主要关注污染物为总石油烃。且土壤和地下水中总石油烃均存在超标现象,通过对超标点位进行分析判断原厂石油烃的排放源为生产车间、潜在排放源为罐区,场地污染的主要原因可能是油罐发生泄漏;对土壤和地下水中总石油烃的非致癌危害商与非致癌风险控制值表征,计算结果表明:石油烃污染物已对土壤造成污染,并迁移至地下水,该污染场地可能对居住地人群造成健康风险。

In order to provide guidance for environmental risk assessment of the TPH(total petroleum hydrocarbons)contaminated sites in China,this assessment of soil and groundwater was undertaken for a TPH site in Tianjin.After three times sampling and analysis of the soil and groundwater,it showed that TPH was the mainly non-attainment pollutant and distributed in both soil and groundwater.Through the analysis of the over-standard points,it is judged that the emission source of the original petroleum hydrocarbons is the production workshop and the potential emission source is the tank area.The main cause of site pollution may be the leakage of oil tanks.The non-carcinogenic hazard quotient and non-carcinogenic risk control value of the total petroleum hydrocarbon in the soil and groundwater were characterized.The calculated results showed that petroleum hydrocarbon pollutants had caused pollution to the soil and migrated to the groundwater,and the contaminated site might cause health risks to the residents.