Wintertime ozone surges: The critical role of alkene ozonolysis
文献类型：期刊论文
| 作者 | Yang, Jin2; Zeren, Yangzong1,2; Guo, Hai1,2; Wang, Yu1,2; Lyu, Xiaopu3,4; Zhou, Beining2; Gao, Hong5; Yao, Dawen2; Wang, Zhanxiang5; Zhao, Shizhen6 |
| 刊名 | ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 22页码:10 |
| 关键词 | Ozone pollution Winter Alkenes Radical chemistry PBM-MCM |
| ISSN号 | 2666-4984 |
| DOI | 10.1016/j.ese.2024.100477 |
| 英文摘要 | Ozone (O3) pollution is usually linked to warm weather and strong solar radiation, making it uncommon in cold winters. However, an unusual occurrence of four high O3 episode days (with maximum hourly concentrations exceeding 100 ppbv and peaking at 121 ppbv) was recorded in January 2018 in Lanzhou city, China. During these episodes, the average daytime concentration of total non-methane volatile organic compounds (TVOCs) reached 153.4 +/- 19.0 ppbv, with alkenes-largely emitted from the local petrochemical industry-comprising 82.3 +/- 13.1 ppbv. Here we show a photochemical box model coupled with a Master Chemical Mechanism to elucidate the mechanisms behind this unusual wintertime O3 pollution. We find that the typically low temperatures (-1.7 +/- 1.3 degrees C) and weak solar radiation (263.6 +/- 60.7 W m-2) of those winter episode days had a minimal effect on the reactivity of VOCs with OH radicals. Instead, the ozonolysis of alkenes generated Criegee intermediates, which rapidly decomposed into substantial ROx radicals (OH, HO2, and RO2) without sunlight. This radical production led to the oxidation of VOCs, with alkene ozonolysis ultimately contributing to 89.6 +/- 8.7% of the O3 formation during these episodes. This mechanism did not activate at night due to the depletion of O3 by the NO titration effect. Furthermore, the findings indicate that a reduction of alkenes by 28.6% or NOx by 27.7% in the early afternoon could significantly mitigate wintertime O3 pollution. Overall, this study unravels the unique mechanism of alkene-induced winter O3 pollution and offers a reference for winter O3 reduction strategies in the petrochemical industrial regions. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of Chinese Society for Environmental Sciences, Harbin Institute of Technology, Chinese Research Academy of Environmental Sciences. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001309003000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81080]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Guo, Hai; Wang, Yu |
| 作者单位 | 1.Hong Kong Polytech Univ, Res Inst Land & Space, Kowloon, Hong Kong 999077, Peoples R China 2.Hong Kong Polytech Univ, Air Qual Studies, Dept Civil & Environm Engn, Kowloon, Hong Kong 999077, Peoples R China 3.Hong Kong Baptist Univ, Dept Geog, Kowloon, Hong Kong 999077, Peoples R China 4.Hong Kong Baptist Univ, Smart Soc Lab, Kowloon, Hong Kong 999077, Peoples R China 5.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Environm Pollut Predict & Control, Lanzhou 730050, Gansu, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 511443, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Jin,Zeren, Yangzong,Guo, Hai,et al. Wintertime ozone surges: The critical role of alkene ozonolysis[J]. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY,2024,22:10. |
| APA | Yang, Jin.,Zeren, Yangzong.,Guo, Hai.,Wang, Yu.,Lyu, Xiaopu.,...&Zhang, Gan.(2024).Wintertime ozone surges: The critical role of alkene ozonolysis.ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY,22,10. |
| MLA | Yang, Jin,et al."Wintertime ozone surges: The critical role of alkene ozonolysis".ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 22(2024):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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