Photochemical Degradation of Iron Citrate in Anoxic Viscous Films Enhanced by Redox Cascades.

ABSTRACT: Iron contained in atmospheric aerosol particles can form complexes with organic ligands and initiate photochemical reactions that alter the composition and physicochemical properties of the particles. Depending on the temperature and humidity, organic particles exist in different phase states, which affects reactant diffusivity and chemical reaction rates. We performed coated-wall flow-tube experiments using citric acid films doped with iron as proxies for secondary organic aerosols. We quantified the CO₂ production under UV irradiation as a function of time and relative humidity (RH) and observed a pronounced decrease of CO₂ production with decreasing RH. The kinetic multilayer model of aerosol surface and bulk chemistry (KM-SUB) and a Monte Carlo-based global optimi

SUBMITTER: Mishra A 

PROVIDER: S-EPMC11931546 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature