| 成都市臭氧重污染成因与来源解析 |
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| 引用本文： | 宋梦迪,冯淼,李歆,谭钦文,宋丹林,刘合凡,董华斌,曾立民,陆克定,张远航.成都市臭氧重污染成因与来源解析[J].中国环境科学,2022,42(3):1057-1065. |
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| 作者姓名： | 宋梦迪 冯淼 李歆 谭钦文 宋丹林 刘合凡 董华斌 曾立民 陆克定 张远航 |
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| 作者单位： | 1. 北京大学环境科学与工程学院环境模拟与污染控制国家重点联合实验室教育部区域污染控制国际合作联合实验室, 北京 100871;2. 成都市环境保护科学研究院, 四川 成都 610072 |
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| 基金项目： | 国家自然科学基金资助项目(91844301,91644108)；;国家重点研发计划资助项目(2017YFC0209400)； |
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| 摘 要： | 采用来源解析的方法对2020年成都市发生的一次较为严重的臭氧污染事件进行了研究.结果表明,此次污染过程呈现从清洁-污染-清洁的变化趋势,污染持续时间长达9d,最大臭氧小时浓度达到258.8μg/m3.气象因素在成都臭氧污染中的影响不可忽略,其中温度与臭氧浓度呈现显著正相关关系,东北风主要出现在污染前和污染后,可能起到稀...
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| 关 键 词： | 臭氧污染 本地生成 外地传输 挥发性有机物 来源解析 成都市 |
| 收稿时间： | 2021-08-03 |
Causes and sources of heavy ozone pollution in Chengdu |
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| SONG Meng-di,FENG Miao,LI Xin,TAN Qin-wen,SONG Dan-lin,LIU He-fan,DONG Hua-bin,CENG Li-min,LU Ke-ding,ZHANG Yuan-hang.Causes and sources of heavy ozone pollution in Chengdu[J].China Environmental Science,2022,42(3):1057-1065. |
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| Authors: | SONG Meng-di FENG Miao LI Xin TAN Qin-wen SONG Dan-lin LIU He-fan DONG Hua-bin CENG Li-min LU Ke-ding ZHANG Yuan-hang |
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| Institution: | 1. International Joint Laboratory for Regional Pollution Control, Ministry of Education, State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;2. Chengdu Academy of Environmental Sciences, Chengdu 610072, China |
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| Abstract: | Based on the method of source analysis, a relatively serious ozone pollution event in Chengdu in 2020 was studied. The results shown that, the pollution event showed a trend of clean-pollution-clean, and the pollution event lasted for 9 days, with the maximum hourly ozone concentration reaching 258.8μg/m3. Meteorological conditions played a vital role in the formation of O3 in Chengdu. Among them, temperature and O3 concentration shown a significant positive correlation. The northeast wind mainly appeared before and after the pollution event, which might dilute and diffuse the concentration of ozone; the southeast wind mainly appeared during the pollution event and had a transmission effect on O3. Alkenes and aromatics played a leading role in the O3 formation in Chengdu which were important precursors for ozone pollution control. Gasoline vehicle emissions(+combustion sources) were the primary source of volatile organic compounds(VOCs) in Chengdu(27.3%~58.7%), and had a significant increase during the pollution event. Chengdu should focus on effective control measures for gasoline vehicle emissions(+ combustion sources) in the treatment of ozone pollution. In the heavy ozone pollution events, accurate identification of the cause of O3 pollution is a prerequisite for pollution control. Based on the comprehensive analysis of meteorological factors and ozone sources in Chengdu, two pollution scenarios were found:scenario of synergy between local production and transport, and scenario of regional transport.Therefore, under the pollution scenario of synergy between local production and transport, it is necessary to take measures to control the emission of precursors, pay close attention to the transmission of ozone, and strengthen joint prevention and control. Under the pollution scenario of regional transport, the control measures should be focused on regional joint prevention and control. |
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| Keywords: | ozone pollution local production regional transport volatile organic compounds(VOCs) source apportionments Chengdu |
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