Articles | Volume 19, issue 4
Atmos. Chem. Phys., 19, 2687–2700, 2019
https://doi.org/10.5194/acp-19-2687-2019
Atmos. Chem. Phys., 19, 2687–2700, 2019
https://doi.org/10.5194/acp-19-2687-2019

Research article 01 Mar 2019

Research article | 01 Mar 2019

Enhancement of secondary organic aerosol formation and its oxidation state by SO2 during photooxidation of 2-methoxyphenol

Changgeng Liu et al.

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Cited articles

Ahmad, W., Coeur, C., Tomas, A., Fagniez, T., Brubach, J.-B., and Cuisset, A.: Infrared spectroscopy of secondary organic aerosol precursors and investigation of the hygroscopicity of SOA formed from the OH reaction with guaiacol and syringol, Appl. Opt., 56, E116–E122, https://doi.org/10.1364/ao.56.00e116, 2017. 
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Cao, G. and Jang, M.: Effects of particle acidity and UV light on secondary organic aerosol formation from oxidation of aromatics in the absence of NOx, Atmos. Environ., 41, 7603–7613, https://doi.org/10.1016/j.atmosenv.2007.05.034, 2007. 
Chen, Q., Liu, Y., Donahue, N. M., Shilling, J. E., and Martin S. T.: Particle-phase chemistry of secondary organic material: Modeled compared to measured O:C and H:C elemental ratios provide constraints, Environ. Sci. Technol., 45, 4763–4770, https://doi.org/10.1021/es104398s, 2011. 
Chen, T., Liu, Y., Chu, B., Liu, C., Liu, J., Ge, Y., Ma, Q., Ma, J., and He, H.: Differences of the oxidation process and secondary organic aerosol formation at low and high precursor concentrations, J. Environ. Sci., 79, 256–263, https://doi.org/10.1016/j.jes.2018.11.011, 2019. 
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Short summary
The effect of SO2 at atmospheric levels on SOA formation and its oxidation state during 2-methoxyphenol photooxidation was investigated with various inorganic seed particles. The presence of SO2 increased SOA yield and oxidation state, suggesting that the functionalization reaction should be more dominant than the oligomerization reaction. SO2 and seed particles were found to have a synergetic contribution to SOA formation. The results demonstrate the important role of SO2 in SOA formation.
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