Heterogeneous Fenton oxidation using Fe-ZSM5 catalyst for removal of ibuprofen in wastewater
| Autor: | Laurie Barthe, Sandyanto Adityosulindro, Carine Julcour-Lebigue |
|---|---|
| Přispěvatelé: | Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Laboratoire de génie chimique [ancien site de Basso-Cambo] (LGC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
02 engineering and technology 010501 environmental sciences Heterogeneous catalysis 01 natural sciences Catalysis chemistry.chemical_compound Reaction rate constant [CHIM.GENI]Chemical Sciences/Chemical engineering Chemical Engineering (miscellaneous) Génie chimique [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Water treatment Hydrogen peroxide Génie des procédés Waste Management and Disposal 0105 earth and related environmental sciences Chemistry Process Chemistry and Technology organic chemicals Advanced oxidation processes Water matrix Mineralization (soil science) 021001 nanoscience & nanotechnology Pollution 6. Clean water Arrhenius plot Kinetic study Distilled water Pharmaceuticals 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Environmental Chemical Engineering Journal of Environmental Chemical Engineering, Elsevier, 2018, 6 (5), pp.5920-5928. ⟨10.1016/j.jece.2018.09.007⟩ |
| ISSN: | 2213-3437 |
| Popis: | International audience; Heterogeneous Fenton oxidation using Fe-zeolite catalyst (of ZSM5 type) was investigated for the removal of ibuprofen (20 mg/L) in water. In particular, the effects of catalyst concentration, oxidant dosage, temperature, solution pH, and water matrix on pollutant conversion and mineralization were evaluated. The activity of leached iron species in solution was also measured to determine the contribution of the homogeneous reaction. Oxidation rate of ibuprofen obeyed a pseudo-first-order kinetics with respect to the pollutant concentration, and the apparent rate constant increased with catalyst and hydrogen peroxide concentrations in the investigated ranges (1-5 g/L of Fe-zeolite and 0.5-7 times the stoichiometric amount of oxidant). Energy activation of 53 kJ/mol was obtained from Arrhenius plot. However, the mineralization yield was not significantly improved by a too large excess of H2O2 or increase of temperature. In the selected conditions (25 °C, 4.8 g/L of catalyst, 2 times the stoichiometric amount of H2O2), 88% of ibuprofen and 27% of TOC were removed after 3 hours of reaction under “natural” pH conditions. Very low leaching (up to 0.2 mg/L) and negligible activity of leached iron in solution indicated that Fenton reaction was mainly induced by iron species on the catalyst surface. Degradation rate of ibuprofen was slower in wastewater effluent as compared to distilled water, mainly due to alkaline buffering and radical scavenging effects of organic and inorganic compounds present in the matrix. Mono- and multi-hydroxylated ibuprofen adducts were found as main oxidation intermediates -in line with free-radical mechanism- as well as 4-isobutylacetophenone from decarboxylation route. |
| Databáze: | OpenAIRE |
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