Toward a better understanding of ferric-oxalate complex photolysis: The role of the aqueous/air interface of droplet
| Autor: | Yu Wang, Wenbo Dong, Yanlin Wu, Marcello Brigante, David Talaga, Sophie Sobanska, Gilles Mailhot |
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| Přispěvatelé: | Beijing Jiaotong University (BJTU), Institut de Chimie de Clermont-Ferrand (ICCF), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of EnvFemental Science & Engineering, Fudan University, Shanghai Institute of Pollution Control and Ecological Security, Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2021 |
| Předmět: |
Atmospheric chemistry
Environmental Engineering Health Toxicology and Mutagenesis Iron Kinetics Inorganic chemistry Oxide Photolysis Surface chemistry Ferric Compounds Oxalate chemistry.chemical_compound [CHIM]Chemical Sciences Environmental Chemistry Reactivity (chemistry) Ferric oxalate Ferrous Compounds Aqueous solution Photolysis Oxalic Acid Photodissociation Public Health Environmental and Occupational Health General Medicine General Chemistry Pollution chemistry Raman spectroscopy Carbonate Ion |
| Zdroj: | Chemosphere Chemosphere, 2022, 289, pp.133127. ⟨10.1016/j.chemosphere.2021.133127⟩ |
| ISSN: | 1879-1298 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2021.133127⟩ |
| Popis: | International audience; In this work, the photo reactivity of ferric oxalate (Fe(III)-Ox) complex in atmospheric particles was investigated. Raman spectroscopy was used to explore the mechanism and kinetics of Fe(III)-Ox photolysis occurring at the aqueous/gas interface, inside the droplet and in bulk solution. Ferrous carbonate (FeCO3) was detected indicating that carbonate ion (CO32−) formed inside the droplets would compete with oxalate ligands for iron complexation. A higher concentration of photoproduct Fe(II)-Ox was observed at the surface and inside of the droplets than in bulk solution. In particular, Fe(III)-Ox on the droplet surface was quickly reduced with light and Fe(II)-Ox concentration gradually decreased with irradiation time. The evolution of Fe(II)-Ox concentration was similar inside the droplet and in bulk solution with a trend of first increasing and then gradually decreasing during irradiation time. Although FeCO3 would hinder Fenton intermediate reaction, the photolysis rate of Fe(III)-Ox in droplets was almost two orders of magnitude times faster than that observed during bulk experiment. In general, the photolysis mechanism and kinetics of Fe(III)-Ox in aqueous/air interface, inside of droplet and bulk solution were distinct, and the production of oxide species from the atmospheric Fe(III)-Ox droplets was underestimated. |
| Databáze: | OpenAIRE |
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