Articles | Volume 23, issue 16
https://doi.org/10.5194/acp-23-9245-2023
https://doi.org/10.5194/acp-23-9245-2023
Research article
 | 
22 Aug 2023
Research article |  | 22 Aug 2023

Seasonal variations in the production of singlet oxygen and organic triplet excited states in aqueous PM2.5 in Hong Kong SAR, South China

Yuting Lyu, Yin Hau Lam, Yitao Li, Nadine Borduas-Dedekind, and Theodora Nah

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Cited articles

Albinet, A., Minero, C., and Vione, D.: Photochemical generation of reactive species upon irradiation of rainwater: Negligible photoactivity of dissolved organic matter, Sci. Total Environ., 408, 3367–3373, 2010. a
Allen, J. M., Gossett, C. J., and Allen, S. K.: Photochemical formation of singlet molecular oxygen (1O2) in illuminated aqueous solutions of p-aminobenzoic acid (PABA), J. Photoch. Photobio. B, 32, 33–37, https://doi.org/10.1016/1011-1344(95)07185-7, 1996. a
Anastasio, C. and Jordan, A. L.: Photoformation of hydroxyl radical and hydrogen peroxide in aerosol particles from Alert, Nunavut: implications for aerosol and snowpack chemistry in the Arctic, Atmos. Environ., 38, 1153–1166, https://doi.org/10.1016/j.atmosenv.2003.11.016, 2004. a, b
Anastasio, C. and McGregor, K. G.: Chemistry of fog waters in California's Central Valley: 1. In situ photoformation of hydroxyl radical and singlet molecular oxygen, Atmos. Environ., 35, 1079–1089, 2001. a, b, c, d
Anastasio, C. and Newberg, J. T.: Sources and sinks of hydroxyl radical in sea-salt particles, J. Geophys. Res.-Atmos., 112, D10306, https://doi.org/10.1029/2006JD008061, 2007. a, b
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Short summary
We measured singlet oxygen (1O2*) and triplet excited states of organic matter (3C*) in illuminated aqueous extracts of PM2.5 collected in different seasons at different sites in Hong Kong SAR, South China. In contrast to the locations, seasonality had significant effects on 3C* and 1O2* production due to seasonal variations in long-range air mass transport. The steady-state concentrations of 3C* and 1O2* correlated with the concentration and absorbance of water-soluble organic carbon.
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