Preprints
https://doi.org/10.5194/acp-2021-67
https://doi.org/10.5194/acp-2021-67

  17 Feb 2021

17 Feb 2021

Review status: this preprint is currently under review for the journal ACP.

Impact of firework on nitrooxy-organosulfates in urban aerosols during Chinese New Year Eve

Qiaorong Xie1,2, Sihui Su1, Jing Chen3, Yuqing Dai4, Siyao Yue2,5, Hang Su5, Haijie Tong6, Wanyu Zhao2, Lujie Ren1, Yisheng Xu7, Dong Cao8, Ying Li2,9, Yele Sun2, Zifa Wang2, Cong-Qiang Liu1, Kimitaka Kawamura10, Guibin Jiang8, Yafang Cheng5, and Pingqing Fu1 Qiaorong Xie et al.
  • 1Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
  • 2LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • 3School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China
  • 4School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
  • 5Max Planck Institute for Chemistry, Multiphase Chemistry Department, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
  • 6Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong
  • 7Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  • 8State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
  • 9Department of Chemistry, California University, Irvine, California 92697-2025, United States
  • 10Chubu Institute for Advanced Studies, Chubu University, Kasugai 487-8501, Japan

Abstract. Little is known about the formation processes of nitrooxy-organosulfates (nitrooxy-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, which are potentially aromatic-like nitrooxy-OSs, considerably increased during the New Year’s Eve. 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 demonstrates that both anthropogenic and biogenic volatile organic compounds are essential precursors of urban secondary organic aerosols (SOA). Besides, more than 98 % of nitrooxy-OSs were extremely low-volatile organic compounds that could easily partition into and consist in the particle phase, and affected 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.

Qiaorong Xie et al.

Status: open (until 14 Apr 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Qiaorong Xie et al.

Qiaorong Xie et al.

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Short summary
This study investigated the role of nighttime chemistry during the Chinese New Year that enhances the formation of nitrooxy-organosulfates in the aerosol phase. Results demonstrate that anthropogenic precursors, together with biogenic ones, considerably contribute to the formation of low-volatile nitrooxy-OSs. Our study provides detailed molecular composition of firework-related aerosols, which gives new insights into the physicochemical properties and potential health effects of urban aerosols.
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