[2017-2022年亳州市PM2.5和O3复合污染演变特征及典型污染事件]。

Q2 Environmental Science Huanjing Kexue/Environmental Science Pub Date : 2024-10-08 DOI:10.13227/j.hjkx.202311032
Ke Wu, Xue-Zhong Wang, Dan-Dan Zhang, Hua-Long Zhu, Yong-Xin Yan, Fan-Xiu Li, Zhen-Hai Wu, Zhen-Wei Zheng, Qi-Kai Gao
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引用次数: 0

摘要

中国的大气污染呈现出复杂的模式,细颗粒物(PM2.5)和臭氧(O3)同时超标。和臭氧(O3)水平越来越明显。为了解亳州市PM2.5和O3的复杂污染特征及演变规律,采用气象分类、典型污染过程分析、前体源调查等多种方法,探讨了2017-2022年亳州市PM2.5和O3的污染及变化情况,进而分析其成因及前体来源。结果表明:①亳州市PM2.5-O3复合污染多发生在高压天气条件下,白天高温低湿促进了O3污染的形成,而夜间高湿和大气氧化条件促进了PM2.5中硝酸盐、铵盐等二次成分的生成。在污染过程中,亳州市的 PM2.5 主要来源于生物质燃烧、二次生成、交通污染、燃煤和扬尘源。挥发性有机物(VOCs)主要来自植物源、交通污染、油气蒸发、溶剂使用、化石燃料燃烧、居民排放和工业排放。生物质燃烧和交通污染在污染过程中贡献巨大。气团轨迹和区域污染形势分析表明,南北气团叠加和本地生成是 2022 年 10 月 18 日至 27 日亳州 PM2.5-O3 复合污染的主要原因。
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[Evolution Characteristics and Typical Pollution Episodes of PM2.5 and O3 Complex Pollution in Bozhou City from 2017 to 2022].

In China, atmospheric pollution exhibits a complex pattern, with simultaneous exceedances of fine particulate matter (PM2.5) and ozone (O3) levels becoming evident. To understand the complex pollution characteristics and evolution patterns of PM2.5 and O3 in Bozhou City, various methods such as weather classification, analysis of typical pollution processes, and investigation of precursor sources were employed to explore the pollution and variations of PM2.5 and O3 in Bozhou City from 2017 to 2022 and subsequently analyze their causes and precursor sources. The results indicated that: ① PM2.5-O3 complex pollution in Bozhou City mostly occurred under high-pressure weather conditions, with daytime high temperatures and low humidity promoting the formation of O3 pollution, whereas nighttime high humidity and atmospheric oxidative conditions promoted the generation of secondary components such as nitrates and ammonium salts in PM2.5. ② During the pollution process, PM2.5 in Bozhou City mainly originated from biomass burning, secondary generation, traffic pollution, coal combustion, and dust sources. Volatile organic compounds (VOCs) primarily emerged from plant sources, traffic pollution, oil and gas evaporation, solvent use, fossil fuel combustion, residential emissions, and industrial emissions. Biomass burning and traffic pollution made significant contributions to the pollution process. ③ Analysis of air mass trajectories and regional pollution situations indicated that the overlay of northern and southern air masses, along with local generation, were the main causes of the PM2.5-O3 complex pollution in Bozhou from October 18th to 27th, 2022.

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来源期刊
Huanjing Kexue/Environmental Science
Huanjing Kexue/Environmental Science Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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