废矿物油贮存豁免量限值研究

目前在废矿物油的管理过程中，运输和处置较为规范，贮存过程存在一定的风险，是废矿物油管理的重点和难点。针对废矿物油管理的贮存环节，采用环境风险评价方法，确定废矿物油贮存的豁免量限值。基于地下水迁移扩散和大气扩散的暴露场景，研究确定了液态废矿物油、含油废水处理污泥的贮存豁免量限值。结果表明，废矿物油中的污染物主要以可挥发性的苯系物、多环芳烃等有机污染物为主，此外还含有少量的重金属；含油废水处理污泥不能进行豁免管理，在贮存环节应实行严格的危险废物管理措施；在开放容器贮存条件下，液态废矿物油基于大气扩散的暴露场景中可豁免量限值为487 kg/a。

Exemption Limit Value for Used Mineral Oil Storage

At present, the transportation and disposal of used mineral oil is relatively normative compared with the storage process. The storage has certain risk and has been the emphasis and difficulty for used mineral oil management. The exemption limit value (ELV) of used mineral oil storage was set up using environmental risk assessment methodology, which could be used for its exemption management. Based on exposure scenarios of groundwater transport and diffusion and air diffusion, the ELVs for the storage of liquid-phase used mineral oil and oily wastewater sludge were figured out. The results showed that the major pollutants in used mineral oil were volatile organic compounds, e.g. benzene compounds and PAHs, with a few heavy metals. The ELV of oily wastewater sludge storage was too little for exemption management, which indicated that its storage must follow the requests of hazardous waste management. For liquid-phase used mineral oil, the ELV was 487 kg/a based on the exposure scenario of air diffusion in the condition of open container storage.