菏泽市环境空气中VOCs污染特征研究

摘要

为研究菏泽市环境空气中VOCs的污染特征,参照EPA TO-15方法对菏泽市环境空气中的VOCs进行分析,并对VOCs的组成、浓度状况、来源和对臭氧生成潜势的贡献等进行探讨.结果表明,该市环境空气中共定性检出挥发性有机物82种,其中烷烃和苯系物分别占有机物种类的29％、22％,VOCs平均浓度为25.6 μg/m3.监测期间,环境空气中的VOCs主要来自汽车尾气排放、汽油蒸汽、液态石油的挥发,其中交通尾气排放是该区域监测期间的主要排放源.烷烃、芳烃是对菏泽市环境空气中臭氧生成潜势贡献较大的关键活性组分,其对臭氧生产潜势的贡献率分别为32.6％、49.9％.%Referring to EPA TO-15 method,the pollution characteristics of volatile organic compounds (VOCs) in ambient air were analyzed in Heze,which included its composition,concentration level,source and the contribution to ozone production potential.The results showed there were 82 kinds of VOCs in samples,and its main components were alkanes and aromatics,which accounted for 29％ and 22％ respectively.The average concentration of VOCs in Heze was 25.6 μg/m3,the VOCs pollutants were mainly contributed by motor vehicle emission,evaporation and leakage of fuel,and motor vehicle emission was the major contributor.Alkane and aromatic hydrocarbon contributed most to the ozone formation potential,which accounted for 32.6％ and 49.9％ respectively.