Articles | Volume 21, issue 1
Atmos. Chem. Phys., 21, 315–338, 2021
Atmos. Chem. Phys., 21, 315–338, 2021
Research article
13 Jan 2021
Research article | 13 Jan 2021

Photochemical degradation of iron(III) citrate/citric acid aerosol quantified with the combination of three complementary experimental techniques and a kinetic process model

Jing Dou et al.

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Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

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Abida, O., Kolar, M., Jirkovsky, J., and Mailhot, G.: Degradation of 4-chlorophenol in aqueous solution photoinduced by Fe(III)–citrate complex, Photochem. Photobiol. Sci., 11, 794–802,, 2012. a, b
Abrahamson, H. B., Rezvani, A. B., and Brushmiller, J.: Photochemical and spectroscopic studies of complexes, of iron(III) with citric acid and other carboxylic acids, Inorg. Chim. Acta, 226, 117–127,, 1994. a
Alpert, P. A., Corral Arroyo, P., Dou, J., Krieger, U. K., Steimer, S. S., Förster, J. D., Ditas, F., Pöhlker, C., Rossignol, S., Passananti, M., Perrier, S., George, C., Shiraiwa, M., Berkemeier, T., Watts, B., and Ammann, M.: Visualizing reaction and diffusion in xanthan gum aerosol particles exposed to ozone, Phys. Chem. Chem. Phys., 21, 20613–20627,, 2019. a, b, c, d, e, f, g, h
Alpert, P. A., Dou, J., Corral Arroyo, P., Schneider, F., Xto, J., Luo, B., Peter, T., Huthwelker, T., Borca, C. N., Henzler, K. D., Herrmann, H., Raabe, J., Watts, B., Krieger, U. K., and Ammann, M.: Photolytic radical persistence due to anoxia in viscous Aerosol particles, Nat. Commun., accepted, 2021. a, b, c, d
Short summary
Photochemistry of iron(III) complexes plays an important role in aerosol aging, especially in the lower troposphere. Ensuing radical chemistry leads to decarboxylation, and the production of peroxides, and oxygenated volatile compounds, resulting in particle mass loss due to release of the volatile products to the gas phase. We investigated kinetic transport limitations due to high particle viscosity under low relative humidity conditions. For quantification a numerical model was developed.
Final-revised paper