基于RBCA模型的油田含油污泥中重金属和多环芳烃环境风险分析OA

As a typical hazardous waste generated from the petroleum industry,oily sludge has complex compositions and comprises various toxic and harmful substances,the long-term storage or improper disposal of which will lead to severe soil environmental pollution and pose significant threats to human health.Soils contaminated by oily sludge in three major oilfield operation areas(KL,KT,KX)of Xinjiang were selected as the research objects,and a systematic analysis of pollutant compositions was conducted,in which the RBCA model was applied to evaluate the potential hazards posed by heavy metals and polycyclic aromatic hydrocarbons(PAHs)in the soils to human health.The results showed that arsenic in the soils of the three operation areas posed a carcinogenic risk exceeding the acceptable threshold(1.0×10-6),and benzo[a]pyrene in KT and KX areas also had a significant carcinogenic risk above this threshold.Exposure pathway analysis identified respiratory inhalation and oral ingestion as the primary risk sources.The screening and risk management of key pollutants in soil contaminated by oily sludge can provide a scientific basis for the precise prevention,control,treatment and subsequent disposal of oily sludge in China.