乙苯
臭氧
环境化学
甲苯
污染
相对湿度
化学
微粒
空气污染
二甲苯
挥发性有机化合物
环境科学
气象学
有机化学
物理
生物
生态学
出处
期刊:PubMed
日期:2020-06-08
卷期号:41 (6): 2555-2564
被引量:1
标识
DOI:10.13227/j.hjkx.201907115
摘要
In the urban area of Shanghai during the complex pollution episode, ozone and PM2.5 were continuously measured from May 1 to May 28, 2019. The characterization of volatile organic compounds (VOCs) and their relationship with secondary formation were studied. The results show that in May 2019, there were four different ozone and PM2.5 pollution processes in Shanghai. The combined pollution of PM2.5 and ozone that occurred under the meteorological conditions of average temperature of approximately 26℃ and relative humidity of approximately 40% was analyzed. The photochemical consumption of VOCs was significantly positively correlated with the maximum net growth of O3 and there was a significant positive correlation between SOAP and PM2.5. The key reactive species of VOCs that significantly contribute to ozone generation were m,p-xylene, ethylene, toluene, propylene, and o-xylene. The key reactive species that significantly contribute to secondary organic aerosols (SOA) were toluene, m,p-xylene, ethylbenzene, o-xylene, and 1,2,3-trimethylbenzene.
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