Chenxi Zhang This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Xuesong Cao2, Xiaomin Sun2, Hengjun Peng This email address is being protected from spambots. You need JavaScript enabled to view it.3 

1 College of Biological and Environmental Engineering, Binzhou University, Binzhou 256600, China
2 Environment Research Institute, Shandong University, Qingdao 266200, China
3 Logistics support department, Shandong University, Jinan 250100, China

Received: November 19, 2020
Revised: February 18, 2021
Accepted: March 2, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Zhang, C., Cao, X., Sun, X., Peng, H. (2021). Study on the Formation of Secondary Organic Aerosol by Ozonolysis of Citral in the Atmosphere. Aerosol Air Qual. Res. 21, 200637.


  • The k of H2O and SO2 with CIs are close to the reported experimental value.
  • CIs can react with SO2 to generate a carbonyl compound and SO3.
  • Ozonolysis of Citral can produce low volatile organic compounds, which can form SOA.


A major research area in atmospheric chemistry focuses on the formation of secondary organic aerosol (SOA), which contains a large variety of low-volatility organic compounds when generated by the ozonolysis of monoterpenes. Thus, we apply quantum chemistry and kinetic calculations to investigate the ozonolysis of citral, which begins with the formation of primary ozonides (POZs) that decompose into Criegee intermediates (CIs). Although CIs have been previously implicated in tropospheric oxidation, the majority are simple compounds for their class, such as CH2OO· or CH3CHOO·. This study, however, reports on the generation and reaction kinetics of larger CIs, which have been shown to oxidize NO and SO2 into NO2 and SO3, respectively, leading to the production of nitric acid and sulfuric acid. Furthermore, the reactions between these CIs, and H2O and SO2 may serve as the dominant mechanism for removing the former from the troposphere, thereby determining the atmospheric CI concentrations. The low-volatility organic compounds potentially arising from the ozonolysis of citral, including aldehydes (–C(=O)H), ketones (–C(=O)–), alcohols (–OH), and hydroperoxides (–OOH), can form SOA through the nucleation, condensation, and/or partitioning of the condensed and gaseous phases.

Keywords: Secondary organic aerosol, Citral, Ozonolysis, Criegee intermediates


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