| 引用本文: | 王振，李春玉，余益军，杨卫芬.2019年夏季常州市挥发性有机物污染特征分析[J].环境监控与预警,2021,13(2):55-59 |
| WANG Zhen, LI Chun-yu, YU Yi-jun, YANG Wei-fen.Analysis on Pollution Characteristics of Volatile Organic Compounds in the Summer of 2019 in Changzhou City[J].Environmental Monitoring and Forewarning,2021,13(2):55-59 |
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| 摘要: |
| 2019年8—9月，在常州市洛阳小学、市监测站和武澄工业园3个监测站点开展了为期49 d的环境空气57种挥发性有机物（VOCs）离线加密监测，分析其浓度水平及组成特征。结果表明，3个站点VOCs的体积分数分别为29.8×10-9，20.8×10-9和253×10-9。3个站点中烷烃的值均值最大，其值占比依次为59.1%，57.2%和51.4%，烷烃中均以乙烷、丙烷和正丁烷值最大。应用臭氧生成潜势（OFP）、OH自由基消耗速率和二次有机气溶胶生成潜势（SOAP）分别对3个站点进行计算，结果显示，各站点芳香烃的数值均最大，OFP占比为67.1%~68.0%，OH自由基消耗速率占比为45.4%~52.0%，SOAP占比为93.3%~94.7%，芳香烃中关键活性组分是甲苯、乙苯和二甲苯等。上风向的洛阳小学与武澄工业园VOCs浓度比市区的市监测站更高，OFP和SOAP也均高于市监测站，表明上风方向的VOCs排放对市区影响较大。 |
| 关键词: 常州市 挥发性有机物 臭氧生成潜势 二次有机气溶胶生成潜势 |
| DOI： |
| 分类号:X823 |
| 文献标识码:B |
| 基金项目:常州市大气PM2.5和臭氧复合污染形成机制研究基金资助项目（CJ20180039） |
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| Analysis on Pollution Characteristics of Volatile Organic Compounds in the Summer of 2019 in Changzhou City |
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WANG Zhen, LI Chun-yu, YU Yi-jun, YANG Wei-fen
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Jiangsu Changzhou Environmental Monitoring Center, Changzhou, Jiangsu 213001, China
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| Abstract: |
| In order to study the concentration and composition characteristics of volatile organic compounds (VOCs) in ambient air in Changzhou City, 57 kinds of VOCs were being measured at 3 sites(Luoyang Primary School, Municipal Monitoring Station and Wucheng Industrial Park) for 49 days by offline densified observation from August 2019 to September 2019. The results showed that the average concentrations of VOCs were 29.8×10-9,20.8 ×10-9 and 25.3 ×10-9 respectively. The concentrations of alkanes were the highest in all sites，in which ethane, propane and n-butane accounted the most, the percentages of alkanes were 59.1%, 57.2% and 51.4% respectively. OFP (ozone formation potential), OH consumption rate and SOAP (secondary organic aerosol formation potential) were applied to assess reactivity of VOCs. The calculation results showed that aromatics contributed the largest parts of the OFP,OH consumption rate and SOAP at each site, the corresponding percentages were 67.1%~68.0%, 45.4%~52.0% and 93.3%~94.7% among 3 sites respectively.Toluene, ethylbenzene and xylene were the key active components in aromatics. The concentrations of VOCs on upwind sites, Luoyang Primary School and Wucheng Industrial Park, were higher than that on urban site, Municipal Monitoring Station, the OFP and SOAP showed the same as well, indicating that the VOCs emissions from the upwind had a great impact on the urban area. |
| Key words: Changzhou city VOCs OFP SOAP |
