Articles | Volume 24, issue 14
https://doi.org/10.5194/acp-24-8507-2024
https://doi.org/10.5194/acp-24-8507-2024
Research article
 | 
30 Jul 2024
Research article |  | 30 Jul 2024

Characterizing water solubility of fresh and aged secondary organic aerosol in PM2.5 with the stable carbon isotope technique

Fenghua Wei, Xing Peng, Liming Cao, Mengxue Tang, Ning Feng, Xiaofeng Huang, and Lingyan He

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Cited articles

Cao, L.-M., Huang, X.-F., Li, Y.-Y., Hu, M., and He, L.-Y.: Volatility measurement of atmospheric submicron aerosols in an urban atmosphere in southern China, Atmos. Chem. Phys., 18, 1729–1743, https://doi.org/10.5194/acp-18-1729-2018, 2018. 
Cao, L. M., Wei, J., He, L. Y., Zeng, H., Li, M. L., Zhu, Q., Yu, G. H., and Huang, X. F.: Aqueous aging of secondary organic aerosol coating onto black carbon: Insights from simultaneous L-ToF-AMS and SP-AMS measurements at an urban site in southern China, J. Clean. Prod., 330, 129888, https://doi.org/10.1016/j.jclepro.2021.129888, 2022. 
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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.-China, 79, 256–263, 2019. 
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Short summary
The water solubility of secondary organic aerosols (SOAs) is a crucial factor in determining their hygroscopicity and climatic impact. Stable carbon isotope and mass spectrometry techniques were combined to assess the water solubility of SOAs with different aging degrees in a coastal megacity in China. This work revealed a much higher water-soluble fraction of aged SOA compared to fresh SOA, indicating that the aging degree of SOA has considerable impacts on its water solubility.
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