Preprints
https://doi.org/10.5194/acp-2021-20
https://doi.org/10.5194/acp-2021-20

  22 Feb 2021

22 Feb 2021

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

Formation and Evolution of Secondary Organic Aerosol Derived from Urban Lifestyle Sources: Vehicle Exhaust and Cooking Emission

Zirui Zhang1,, Wenfei Zhu1,, Min Hu1,2,5, Kefan Liu1, Hui Wang1, Rongzhi Tang1, Ruizhe Shen1, Ying Yu1, Rui Tan1, Kai Song1, Yuanju Li1, Wenbin Zhang3, Zhou Zhang3, Hongming Xu3, Shijin Shuai3, Shuangde Li4, Yunfa Chen4, Jiayun Li6, Yuesi Wang6, and Song Guo1 Zirui Zhang et al.
  • 1State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
  • 2Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China P. R.
  • 3State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
  • 4State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • 5Beijing Innovation Center for Engineering Sciences and Advanced Technology, Peking University, Beijing 100871, China
  • 6State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • These authors contributed equally to this work.

Abstract. Both vehicle exhaust and cooking emission are closely related to the daily life of city dwellers, which are considered as major sources of urban secondary organic aerosol (SOA). Here, we defined the SOA derived from vehicle exhaust and cooking emission as Urban Lifestyle SOA, and simulated their formation using a Gothenburg potential aerosol mass reactor (Go: PAM). After samples had been aged under 0.3–5.5 days of equivalent photochemical age, these two urban lifestyle SOA showed markedly distinct features in SOA mass growth potentials, oxidation pathways and mass spectra. The SOA / POA mass ratios of vehicle groups (107) were 44 times larger than those of cooking groups (2.38) at about 2 days of equivalent photochemical age. It reveals that organics from vehicle may undergo the alcohol/peroxide and carboxylic acid oxidation pathway to produce abundant less/more oxidized oxygenated OA (LO-OOA and MO-OOA), and only a few primary hydrocarbon-like organic aerosol (HOA) remains unaged. In contrast, organics from cooking may undergo the alcohol/peroxide oxidation pathway to produce moderate LO-OOA, and comparable primary cooking organic aerosol (COA) remains unaged. Our findings provide an insight into atmospheric contributions and chemical evolutions for urban lifestyle SOA, which would greatly influence the air quality and health risk assessments in urban areas.

Zirui Zhang et al.

Status: open (until 19 Apr 2021)

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

Zirui Zhang et al.

Zirui Zhang et al.

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Short summary
We comprehensively investigated the mass growth potential, oxidation degree, formation pathway and mass spectra features of typical urban lifestyle secondary organic aerosol (SOA) including vehicle SOA and cooking SOA. The mass spectra we acquired could provide necessary references to estimate the mass fractions of vehicle and cooking SOA (two urban lifestyle SOA) in the atmosphere, which would greatly decrease the uncertainty of air quality evaluation and health risk assessment in urban areas.
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