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

Dou, Jing; Alpert, Peter A.; Corral Arroyo, Pablo; Luo, Beiping; Schneider, Frederic; Xto, Jacinta; Huthwelker, Thomas; Borca, Camelia N.; Henzler, Katja D.; Raabe, Jörg; Watts, Benjamin; Herrmann, Hartmut; Peter, Thomas; Ammann, Markus; Krieger, Ulrich K.

doi:https://doi.org/10.5194/acp-21-315-2021

Articles | Volume 21, issue 1

Atmos. Chem. Phys., 21, 315–338, 2021

https://doi.org/10.5194/acp-21-315-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Atmos. Chem. Phys., 21, 315–338, 2021

https://doi.org/10.5194/acp-21-315-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 1

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.

Model code and software

Photochemical degradation of iron(III)-citrate/citric acid aerosol quantified with the combination of three complementary experimental techniques and a kinetic process model: PRAD model Jing Dou, Peter A. Alpert, Pablo Corral Arroyo, Beiping Luo, Frederic Schneider, Jacinta Xto, Thomas Huthwelker, Camelia N. Borca, Katja D. Henzler, Jörg Raabe, Benjamin Watts, Hartmut Herrmann, Thomas Peter, Markus Ammann, and Ulrich K. Krieger https://doi.org/10.3929/ethz-b-000451609

Video supplement

Shift of Mie-resonance pattern with time Jing Dou https://doi.org/10.5446/47955

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.