Degradation of the emerging contaminant ibuprofen in water by photo-Fenton
| Autor: | Fabiola Méndez-Arriaga, Jaime Giménez, Santiago Esplugas |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
inorganic chemicals
Environmental Engineering Stereochemistry Decarboxylation Iron Fresh Water Ibuprofen Mineralization (biology) Hydroxylation chemistry.chemical_compound Hydrogen peroxide Waste Management and Disposal Effluent Environmental Restoration and Remediation Water Science and Technology Civil and Structural Engineering Ecological Modeling Anti-Inflammatory Agents Non-Steroidal Hydrogen Peroxide Biodegradation Pollution chemistry Photocatalysis Degradation (geology) Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Water Research. 44:589-595 |
| ISSN: | 0043-1354 |
| Popis: | In this study the degradation of the worldwide Non-Steroidal Anti-Inflammatory Drug (NSAID) ibuprofen (IBP) by photo-Fenton reaction by use of solar artificial irradiation was carried out. Non-photocatalytic experiments (complex formation, photolysis and UV/Vis-H(2)O(2) oxidation) were executed to evaluate the isolated effects and additional differentiated degradation pathways of IBP. The solar photolysis cleavage of H(2)O(2) generates hydroxylated-IBP byproducts without mineralization. Fenton reaction, however promotes hydroxylation with a 10% contamination in form of a mineralization. In contrast photo-Fenton in addition promotes the decarboxylation of IBP and its total depletion is observed. In absence of H(2)O(2) a decrease of IBP was observed in the Fe(II)/UV-Vis process due to the complex formation between iron and the IBP-carboxylic moiety. The degradation pathway can be described as an interconnected and successive principal decarboxylation and hydroxylation steps. TOC depletion of 40% was observed in photo-Fenton degradation. The iron-IBP binding was the key-point of the decarboxylation pathway. Both decarboxylation and hydroxylation mechanisms, as individual or parallel process are responsible for IBP removal in Fenton and photo-Fenton systems. An increase in the biodegradability of the final effluent after photo-Fenton treatment was observed. Final BOD(5) of 25 mg L(-1) was reached in contrast to the initial BOD(5) shown by the untreated IBP solution (BOD(5) |
| Databáze: | OpenAIRE |
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