Articles | Volume 22, issue 10
https://doi.org/10.5194/acp-22-6971-2022
https://doi.org/10.5194/acp-22-6971-2022
Research article
 | 
31 May 2022
Research article |  | 31 May 2022

Reversible and irreversible gas–particle partitioning of dicarbonyl compounds observed in the real atmosphere

Jingcheng Hu, Zhongming Chen, Xuan Qin, and Ping Dong

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Cited articles

Axson, J. L., Takahashi, K., De Haan, D. O., and Vaida, V.: Gas-phase water-mediated equilibrium between methylglyoxal and its geminal diol, P. Natl. Acad. Sci. USA, 107, 6687–6692, https://doi.org/10.1073/pnas.0912121107, 2010. 
Chen, X., Zhang, Y., Zhao, J., Liu, Y., Shen, C., Wu, L., Wang, X., Fan, Q., Zhou, S., and Hang, J.: Regional modeling of secondary organic aerosol formation over eastern China: The impact of uptake coefficients of dicarbonyls and semivolatile process of primary organic aerosol, Sci. Total Environ., 793, 148176, https://doi.org/10.1016/j.scitotenv.2021.148176, 2021. 
Clegg, S. L., Brimblecombe, P., and Wexler, A. S.: Thermodynamic Model of the System H+-NH4+-SO42--NO3--H2O at Tropospheric Temperatures, J. Phys. Chem. A, 102, 2137–2154, 1998. 
Cui, J., Sun, M., Wang, L., Guo, J., Xie, G., Zhang, J., and Zhang, R.: Gas-particle partitioning of carbonyls and its influencing factors in the urban atmosphere of Zhengzhou, China, Sci. Total Environ., 751, 142027, https://doi.org/10.1016/j.scitotenv.2020.142027, 2021. 
Curry, L. A., Tsui, W. G., and McNeill, V. F.: Technical note: Updated parameterization of the reactive uptake of glyoxal and methylglyoxal by atmospheric aerosols and cloud droplets, Atmos. Chem. Phys., 18, 9823–9830, https://doi.org/10.5194/acp-18-9823-2018, 2018. 
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Short summary
The gas–particle partitioning process of glyoxal and methylglyoxal could contribute to secondary organic aerosol formation. Here, we launched five observations in different seasons and simultaneously measured glyoxal and methylglyoxal in the gas and particle phases. Compared to reversible pathways, irreversible pathways played a dominant role with a proportion of more than 90 % in the ambient atmosphere, and the proportion was influenced by relative humidity and inorganic components in aerosols.
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