【类型】期刊
【题名】Analysis of a Typical Ozone Pollution Process and Its Precursor VOCs Emission Characteristics in Lu’an City Based on Online VOCs Observation
【作者】 李 平
【关键词】 挥发性有机物 VOCs Source Appointment 来源解析 臭氧 六安市 Lu’an City O3
【期刊名】Open Journal of Natural Science
【摘要】In September 2020, the ozone pollution process of Lu’an City, the only city in the Yangtze River Delta with ozone pollution for 9 consecutive days, was analyzed in depth. In the autumn of 2020, the 41-day continuous online VOCs monitoring was carried out at the urban monitoring station of Lu’an City, exploring the concentration level and composition change characteristics of volatile organic compounds (VOCs) as ozone precursors. According to the ozone generation potential (OFP), the key ozone precursors at the monitoring station were obtained, the source of VOCs was analyzed by using the receptor model (PMF), and the prevention and control measures of ozone and VOCs pollution in Lu’an City were put forward accordingly. The results show that the ozone pollution in Lu’an City is jointly dominated by meteorological factors and human factors. Influenced by the downdraft around the typhoon and the vertical transport of ozone in the upper air, coupled with poor horizontal diffusion, continuous ozone pollution occurs. The average concentration level of VOCs at the monitoring station is 30.9 ppb, and the VOCs with high proportion are alkanes. The components whose OFP value and concentration value are greater than the 90th percentile of the site are m-xylene/p-xylene and toluene, both of which have high ozone contribution potential and control and emission reduction potential; among the top ten components with OFP values at the monitoring building site, 5 are aromatic hydrocarbons, 4 are olefins, and 1 is OVOCs, indicating that local industrial emissions and solvent use play a major role in promoting ozone generation. The PMF receptor model is used to determine the combustion source, solvent use source, industrial emission source, oil volatile source, plant source, and vehicle exhaust emission source. The vehicle exhaust gas source and industrial emission source play a leading role in the generation of O3 in Lu’an City, and it is recommended to be the optimal control source.
【年份】2023
【ISSN】2330-1724
【页码】81-95
【期号】1
【作者单位】安徽省马鞍山生态环境监测中心，安徽 马鞍山
【期刊卷】11
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