沈阳市某化工园区环境空气中挥发性有机物污染特征及来源分析

Pollution Characteristics and Source Analysis of Volatile Organic Compounds in Ambient Air of a Chemical Industrial Park in Shenyang City

选取沈阳市某化工园区2019年11月至2020年10月的VOCs在线监测数据,评估了该区域VOCs的污染程度,并对其活性及可能来源进行了分析。结果表明:该区域内环境空气中VOCs平均体积分数为61.34×10^(-9),乙炔、丙烷和乙烷是体积分数最高的3个物种。烯烃的OH自由基反应活性最高,占总VOCs的L^(OH)的47.2%;芳香烃的OFP最高,占总VOCs的OFP的38.6%。芳香烃的SOA最大。共解析除五类VOCs源,分别为燃料燃烧、油气和溶剂挥发、石油工业、有机化学工业、乙炔工业。其中石油工业占比最高,为26.3%。应加强对该区域石油工业的控制。

Based on the online monitoring data of VOCs in an industrial park of Shenyang city from November 2018 to October 2020,the pollution level of VOCs in the area was assessed,and their activity and possible sources were analyzed.The results showed that the average volume fraction of VOCs in the ambient air in this area was 6.134×10^(-8),and acetylene,propane and ethane were three species with the highest volume fraction.The OH radical reactivity of olefins was the highest,accounting for 47.2%of the L^(OH) of the total VOCs;the OFP of aromatic hydrocarbons was the highest,accounting for 38.6%of the OFP of the total VOCs.Aromatic hydrocarbons had the largest SOA.A total of five types of VOCs sources were found,namely fuel combustion,oil and gas and solvent volatilization,petroleum industry,organic chemical industry,and acetylene industry.Among them,the petroleum industry accounted for the highest proportion,at 26.3%.The oil industry should be controlled in the region.