Articles | Volume 22, issue 20
https://doi.org/10.5194/acp-22-13845-2022
https://doi.org/10.5194/acp-22-13845-2022
Measurement report
 | 
28 Oct 2022
Measurement report |  | 28 Oct 2022

Measurement report: Investigation of pH- and particle-size-dependent chemical and optical properties of water-soluble organic carbon: implications for its sources and aging processes

Yuanyuan Qin, Juanjuan Qin, Xiaobo Wang, Kang Xiao, Ting Qi, Yuwei Gao, Xueming Zhou, Shaoxuan Shi, Jingnan Li, Jingsi Gao, Ziyin Zhang, Jihua Tan, Yang Zhang, and Rongzhi Chen

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Cited articles

Aiona, P. K., Luek, J. L., Timko, S. A., Powers, L. C., Gonsior, M., and Nizkorodov, S. A.: Effect of photolysis on absorption and fluorescence spectra of light-absorbing secondary organic aerosols, ACS Earth. Space. Chem., 2, 235–245, https://doi.org/10.1021/acsearthspacechem.7b00153, 2018. 
Ault, A. P.: Aerosol acidity: Novel measurements and implications for atmospheric chemistry, Acc. Chem. Res., 53, 1703–1714, https://doi.org/10.1021/acs.accounts.0c00303, 2020. 
Baduel, C., Monge, M. E., Voisin, D., Jaffrezo, J. L., George, C., Haddad, I. E., Marchand, N., and D'Anna, B.: Oxidation of atmospheric humic like substances by ozone: A kinetic and structural analysis approach, Environ. Sci. Technol., 45, 5238–5244, https://doi.org/10.1021/es200587z, 2011. 
Battaglia, M. A., Douglas, S., and Hennigan, C. J.: Effect of the urban heat island on aerosol pH, Environ. Sci. Technol., 51, 13095–13103, https://doi.org/10.1021/acs.est.7b02786, 2017. 
Boreddy, S. K. R., Hegde, P., and Aswini, A. R.: Chemical characteristics, size distributions, and aerosol liquid water in size-resolved coastal urban aerosols allied with distinct air masses over tropical peninsular India, ACS Earth. Space. Chem., 5, 457–473, https://doi.org/10.1021/acsearthspacechem.0c00282, 2021. 
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Short summary
Deep interrogation of water-soluble organic carbon (WSOC) in aerosols is critical and challenging considering its involvement in many key aerosol-associated chemical reactions. This work examined how the chemical structures (functional groups) and optical properties (UV/fluorescence properties) of WSOC were affected by pH and particle size. We found that the pH- and particle-size-dependent behaviors could be used to reveal the structures, sources, and aging of aerosol WSOC.
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