Heterogeneous photo-Fenton degradation of phenolic aqueous solutions

A novel iron-containing mesostructured material has been successfully tested for the heterogeneous photo-Fenton degradation of phenolic aqueous solutions using near UV-visible irradiation (higher than 313 nm) at room temperature and close to neutral pH. This catalyst is a composite material that con...

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Detalles Bibliográficos
Autores: Martínez, F., Calleja, G., Melero, J.A., Molina, R.
Tipo de recurso: artículo
Fecha de publicación:2005
País:España
Institución:Universidad Rey Juan Carlos
Repositorio:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
OAI Identifier:oai:burjcdigital.urjc.es:10115/3708
Acceso en línea:http://hdl.handle.net/10115/3708
Access Level:acceso abierto
Palabra clave:Medio Ambiente
23 Química
2391 Química Ambiental
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spelling Heterogeneous photo-Fenton degradation of phenolic aqueous solutionsMartínez, F.Calleja, G.Melero, J.A.Molina, R.Medio Ambiente23 Química2391 Química AmbientalA novel iron-containing mesostructured material has been successfully tested for the heterogeneous photo-Fenton degradation of phenolic aqueous solutions using near UV-visible irradiation (higher than 313 nm) at room temperature and close to neutral pH. This catalyst is a composite material that contains crystalline hematite particles embedded into the mesostructured SBA-15 matrix in a wide distribution of size (30 ¿ 300 nm) and well dispersed ionic iron species within the siliceous framework. The outstanding physicochemical properties make this material a promising photocatalyst leading to better activity than other unsupported iron oxides. An experimental design model has been applied to assign the weight of catalyst and hydrogen peroxide concentrations in the photo-Fenton processes over this particular material. The catalytic performance has been monitored in terms of aromatics and total organic carbon (TOC) conversions, whereas the catalyst stability was evaluated according to the metal leached into the aqueous solution. Hydrogen peroxide concentration plays an important role in the stability of the iron species, preventing their leaching out into the solution, in contrast to the effect shown in typical dark Fenton reaction. The homogeneous leached iron species result in very little contribution to the overall photocatalysis process. Catalyst loadings of 0.5 g/L and concentration of hydrogen peroxide close to the stoichiometric amount have yielded a total abatement of phenol and a remarkable organic mineralization.Tecnología Química y AmbientalELSEVIER201020102005info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10115/3708reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlosinstname:Universidad Rey Juan CarlosInglésAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:burjcdigital.urjc.es:10115/37082026-06-24T12:48:17Z
dc.title.none.fl_str_mv Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
title Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
spellingShingle Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
Martínez, F.
Medio Ambiente
23 Química
2391 Química Ambiental
title_short Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
title_full Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
title_fullStr Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
title_full_unstemmed Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
title_sort Heterogeneous photo-Fenton degradation of phenolic aqueous solutions
dc.creator.none.fl_str_mv Martínez, F.
Calleja, G.
Melero, J.A.
Molina, R.
author Martínez, F.
author_facet Martínez, F.
Calleja, G.
Melero, J.A.
Molina, R.
author_role author
author2 Calleja, G.
Melero, J.A.
Molina, R.
author2_role author
author
author
dc.subject.none.fl_str_mv Medio Ambiente
23 Química
2391 Química Ambiental
topic Medio Ambiente
23 Química
2391 Química Ambiental
description A novel iron-containing mesostructured material has been successfully tested for the heterogeneous photo-Fenton degradation of phenolic aqueous solutions using near UV-visible irradiation (higher than 313 nm) at room temperature and close to neutral pH. This catalyst is a composite material that contains crystalline hematite particles embedded into the mesostructured SBA-15 matrix in a wide distribution of size (30 ¿ 300 nm) and well dispersed ionic iron species within the siliceous framework. The outstanding physicochemical properties make this material a promising photocatalyst leading to better activity than other unsupported iron oxides. An experimental design model has been applied to assign the weight of catalyst and hydrogen peroxide concentrations in the photo-Fenton processes over this particular material. The catalytic performance has been monitored in terms of aromatics and total organic carbon (TOC) conversions, whereas the catalyst stability was evaluated according to the metal leached into the aqueous solution. Hydrogen peroxide concentration plays an important role in the stability of the iron species, preventing their leaching out into the solution, in contrast to the effect shown in typical dark Fenton reaction. The homogeneous leached iron species result in very little contribution to the overall photocatalysis process. Catalyst loadings of 0.5 g/L and concentration of hydrogen peroxide close to the stoichiometric amount have yielded a total abatement of phenol and a remarkable organic mineralization.
publishDate 2005
dc.date.none.fl_str_mv 2005
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10115/3708
url http://hdl.handle.net/10115/3708
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ELSEVIER
publisher.none.fl_str_mv ELSEVIER
dc.source.none.fl_str_mv reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
instname:Universidad Rey Juan Carlos
instname_str Universidad Rey Juan Carlos
reponame_str BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
collection BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
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repository.mail.fl_str_mv
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