Enhanced Reactivity of Superoxide in Water−Solid Matrices
| Autor: | I. Francis Cheng, Kenichi Shimizu, Olha S. Furman, Richard J. Watts, Amy L. Teel, Derek F. Laine, Alexander Blumenfeld |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Potassium Compounds
Surface Properties Iron Inorganic chemistry chemistry.chemical_compound Superoxides Hydrocarbons Chlorinated Environmental Chemistry Reactivity (chemistry) Hydrogen peroxide Edetic Acid Chemical decomposition Ethane Aqueous solution Superoxide Electron Spin Resonance Spectroscopy Water Oxides Hydrogen Peroxide General Chemistry Kinetics Manganese Compounds chemistry In situ chemical oxidation Reagent Glass Hexanols Aliphatic compound |
| Zdroj: | Environmental Science & Technology. 43:1528-1533 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es802505s |
| Popis: | Superoxide is unreactive in deionized water, but aqueous systems containing added solvents, including H2O2 at >100 mM, show significantly increased reactivity of superoxide with oxidized organic compounds such as highly chlorinated aliphatics. The potential for solid surfaces to similarly increase the reactivity of superoxide in water was investigated. Heterogeneous birnessite (gamma-MnO2)-catalyzed decomposition of H2O2 promoted the degradation of the superoxide probe hexachloroethane (HCA) at H202 concentrations as low as 7.5 mM, while no measurable HCA degradation was found in parallel homogeneous iron(III)-EDTA-H2O2 systems at H2O2 concentrations |
| Databáze: | OpenAIRE |
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