Articles | Volume 21, issue 9
Atmos. Chem. Phys., 21, 6647–6661, 2021
https://doi.org/10.5194/acp-21-6647-2021
Atmos. Chem. Phys., 21, 6647–6661, 2021
https://doi.org/10.5194/acp-21-6647-2021
Research article
 | Highlight paper
04 May 2021
Research article  | Highlight paper | 04 May 2021

Heterogeneous interactions between SO2 and organic peroxides in submicron aerosol

Shunyao Wang et al.

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Cited articles

Abbatt, J. P. D., Lee, A. K. Y., and Thornton, J. A.: Quantifying trace gas uptake to tropospheric aerosol: recent advances and remaining challenges, Chem. Soc. Rev., 41, 6555–6581, https://doi.org/10.1039/c2cs35052a, 2012. 
Adams, J. W., Rodriguez, D., and Cox, R. A.: The uptake of SO2 on Saharan dust: a flow tube study, Atmos. Chem. Phys., 5, 2679–2689, https://doi.org/10.5194/acp-5-2679-2005, 2005. 
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Berndt, T., Richters, S., Kaethner, R., Voigtländer, J., Stratmann, F., Sipilä, M., Kulmala, M., and Herrmann, H.: Gas-phase ozonolysis of cycloalkenes: Formation of highly oxidized RO2 radicals and their reactions with NO, NO2, SO2, and other RO2 radicals, J. Phys. Chem. A, 119, 10336–10348, https://doi.org/10.1021/acs.jpca.5b07295, 2015. 
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Discrepancies between atmospheric modeling and field observations, especially in highly polluted cities, have highlighted the lack of understanding of sulfate formation mechanisms and kinetics. Here, we directly quantify the reactive uptake coefficient of SO2 onto organic peroxides and study the important governing factors. The SO2 uptake rate was observed to depend on RH, peroxide amount and reactivity, pH, and ionic strength, which provides a framework to better predict sulfate formation.
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