有机磷农药生产企业遗留场地污染调查及风险评估

Investigation and Risk Assessment for Remaining Site of An Organophosphorus Pesticide Production Enterprise

为了解某有机磷农药生产企业遗留场地土壤及地下水污染情况,开展了场地环境污染状况调查及风险评估。调查与分析结果表明:该场地土壤和地下水受到不同程度污染,并产生了一定的迁移扩散,土壤主要污染物为砷、甲基对硫磷和杀螟硫磷,其中砷和甲基对硫磷最大超标倍数分别为0.99和141.67倍;地下水主要污染物为砷、甲胺磷、甲基对硫磷和敌敌畏,最大超标倍数分别为0.42、2.4、17599和4.5倍。土壤和地下水污染区域均主要位于甲胺磷生产车间附近,一些污染物具有致癌性,场地环境存在风险隐患,可能对人体产生一定危害,建议对此场地的土壤和地下水开展修复治理。

In order to investigate the soil and groundwater pollution of the site left by an organophosphorus pesticide production enterprise,the environmental pollution survey and risk assessment of the site were carried out.The survey results showed that the soil and groundwater of the site were polluted to varying degrees.The main pollutants in the soil were Arsenic,Methyl parathion and Fenitrothion;the maximum exceeding times of Arsenic and Methyl parathion were 0.99 and 141.67 times respectively;and the main pollutants in the groundwater were Arsenic,Methamidophos,Methyl parathion and Dichlorvos;the maximum exceeding multiples are 0.42,2.4,17599 and 4.5 times respectively.The polluted area is mainly located near the Methamidophos production workshop.Some pollutants are carcinogenic;the environmental risk of the site is unacceptable and there are hidden risks;the soil and groundwater of the site need to be restored and treated.