Author, as appears in the article.: Inchaurrondo, N.; Ramos, C. P.; Zerjav, G.; Font, J.; Pintar, A.; Haure, P.;
Department: Enginyeria Química
URV's Author/s: Font Capafons, José
Keywords: Phenol oxidation Phenol Natural catalyst Fenton-like Fenton like process Diatomites
Abstract: Raw diatomites were modified by acid or base treatments; addition of Fe or Cu species through the incipient wet impregnation method (IWI) and calcination at 700°C. Samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM-EDX), ossbauer spectroscopy, point of zero charge (PZC), pyridine temperature programme desorption (TPD), themogravimetric analysis (TGA) and BET surface area determination. According to characterization results, four samples were selected: simply calcined Diatom (D), iron added (Fe-D), acid treated Fe reimpregnated (H-Fe-D) and copper added (Cu/Fe-D). Materials were tested as catalysts for the peroxidation of phenol solutions (1000 mg/L) in a batch laboratory reactor, at different operating conditions in 5 hours tests. D, Fe-D and H-Fe-D samples allowed complete phenol removal under all the operating range studied. At optimum conditions, TOC conversions of 50-55 % were obtained. Metal ions added through the IWI procedure resulted more labile than metal present originally. The acidic treatment favoured the initiation of the reaction showing a reduction of the induction period at almost neutral initial pH. The Fe-D catalyst exhibited poor performance, lower reactions rates and higher Fe leaching. Conversely, high TOC conversions (80 %) were achieved with Cu/Fe-D, however, Cu leaching was excessive (12.7 %). D and H-Fe-D samples were used in consecutive runs (up to 20 h) maintaining phenol conversion and TOC reduction. Overall, a good performance was obtained, even comparable to more sophisticated Fe catalysts.
Thematic Areas: Química Odontología Nanoscience and nanotechnology Nanoscience & nanotechnology Mechanics of materials Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materials science Materiais Interdisciplinar Geociências General materials science General chemistry Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Condensed matter physics Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, physical Chemistry, applied Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: jose.font@urv.cat
Author identifier: 0000-0002-4007-7905
Record's date: 2023-05-20
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S1387181116304899
Papper original source: Microporous And Mesoporous Materials. 239 396-408
APA: Inchaurrondo, N.; Ramos, C. P.; Zerjav, G.; Font, J.; Pintar, A.; Haure, P.; (2017). Modified diatomites for Fenton-like oxidation of phenol. Microporous And Mesoporous Materials, 239(), 396-408. DOI: 10.1016/j.micromeso.2016.10.026
Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1016/j.micromeso.2016.10.026
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
Publication Type: Journal Publications
Repositori URV