Increase of nitrooxy organosulfates in firework-related urban aerosols during Chinese New Year's Eve
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Published:2021-07-30
Issue:14
Volume:21
Page:11453-11465
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Xie Qiaorong, Su Sihui, Chen Jing, Dai Yuqing, Yue SiyaoORCID, Su HangORCID, Tong HaijieORCID, Zhao Wanyu, Ren Lujie, Xu Yisheng, Cao Dong, Li Ying, Sun YeleORCID, Wang Zifa, Liu Cong-Qiang, Kawamura KimitakaORCID, Jiang Guibin, Cheng YafangORCID, Fu PingqingORCID
Abstract
Abstract. Little is known about the formation processes of
nitrooxy organosulfates (OSs) by nighttime chemistry. Here we
characterize nitrooxy OSs at a molecular level in firework-related aerosols
in urban Beijing during Chinese New Year. High-molecular-weight nitrooxy OSs
with relatively low H / C and O / C ratios and high unsaturation are potentially
aromatic-like nitrooxy OSs. They considerably increased during New
Year's Eve, affected by the firework emissions. We find that large
quantities of carboxylic-rich alicyclic molecules possibly formed by
nighttime reactions. The sufficient abundance of aliphatic-like and
aromatic-like nitrooxy OSs in firework-related aerosols demonstrates that
anthropogenic volatile organic compounds are important precursors of
urban secondary organic aerosols (SOAs). In addition, more than 98 % of those
nitrooxy OSs are extremely low-volatility organic compounds that can easily
partition into and consist in the particle phase and affect the volatility,
hygroscopicity, and even toxicity of urban aerosols. Our study provides new
insights into the formation of nitrooxy organosulfates from anthropogenic
emissions through nighttime chemistry in the urban atmosphere.
Funder
National Natural Science Foundation of China
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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