Photolytic degradation of molecular iodine adsorbed on model SiO2 particles
| Autor: | Rafal Strekowski, Amandine Durand, L. Bosland, Henri Wortham, Alexandre Figueiredo |
|---|---|
| Přispěvatelé: | Laboratoire d'Etude du corium et du Transfert des radioélèments (IRSN/PSN-RES/SAG/LETR), Service des Accidents Graves (IRSN/PSN-RES/SAG), Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), PSN-RES/SAG/LETR, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Kinetics Photodissociation chemistry.chemical_element 010501 environmental sciences Atmospheric dispersion modeling Iodine Photochemistry 01 natural sciences Pollution Chromatographic separation chemistry.chemical_compound Adsorption chemistry 13. Climate action [CHIM]Chemical Sciences Environmental Chemistry Derivatization Photodegradation Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Science of the Total Environment Science of the Total Environment, 2020, 723, pp.1-8. ⟨10.1016/j.scitotenv.2020.137951⟩ Science of the Total Environment, Elsevier, 2020, 723, pp.1-8. ⟨10.1016/j.scitotenv.2020.137951⟩ |
| ISSN: | 0048-9697 1879-1026 |
| Popis: | International audience; A molecular derivatization method followed by gas chromatographic separation coupled with mass spectrometric detection was used to study photolytic degradation of I2 on solid SiO2 particles. The heterogeneous photodegradation of I2 is studied at ambient temperature in synthetic air to better understand its atmospheric dispersion and environmental fate. The obtained laboratory results show a considerably enhanced atmospheric lifetime of molecular iodine adsorbed on solid media. The heterogeneous atmospheric residence time () of I2 is calculated to be 187 minutes or 3 hours. The obtained heterogeneous lifetime of I2 is shown to be considerably longer than its destruction by its principal atmospheric sink, namely, photolysis. The observed enhanced atmospheric lifetime of I2 on heterogeneous media will likely have direct consequences on the atmospheric transport of I2 that influences the toxicity or the oxidative capacity of the atmosphere. |
| Databáze: | OpenAIRE |
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