Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways

[EN] The chemical decolorization of the azo-dye Acid Black 1 (AB1) by ZVI-assisted Fenton systems was investigated for assessing the relative importance of reductive and oxidative pathways. To this end, system evolution was followed by UV-vis, HPLC, CG-MS, TOC and toxicity measurements. The effects...

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Autores: Donadelli, Jorge A., Carlos, Luciano, Garcia Einschlag, Fernando S., Arqués Sanz, Antonio|||0000-0001-8692-6979
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/117534
Acceso en línea:https://riunet.upv.es/handle/10251/117534
Access Level:acceso abierto
Palabra clave:ZVI-assisted Fenton
Azo Dyes
PH dependent mechanism
Advanced oxidation processes
Wastewater treatment
QUIMICA FISICA
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
title Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
spellingShingle Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
Donadelli, Jorge A.
ZVI-assisted Fenton
Azo Dyes
PH dependent mechanism
Advanced oxidation processes
Wastewater treatment
QUIMICA FISICA
title_short Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
title_full Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
title_fullStr Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
title_full_unstemmed Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
title_sort Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways
dc.creator.none.fl_str_mv Donadelli, Jorge A.
Carlos, Luciano
Garcia Einschlag, Fernando S.
Arqués Sanz, Antonio|||0000-0001-8692-6979
author Donadelli, Jorge A.
author_facet Donadelli, Jorge A.
Carlos, Luciano
Garcia Einschlag, Fernando S.
Arqués Sanz, Antonio|||0000-0001-8692-6979
author_role author
author2 Carlos, Luciano
Garcia Einschlag, Fernando S.
Arqués Sanz, Antonio|||0000-0001-8692-6979
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Ingeniería Textil y Papelera
Escuela Politécnica Superior de Alcoy
Grupo de Procesos de Oxidación Avanzada
Universidad Nacional de La Plata, Argentina
Agencia Nacional de Promoción Científica y Tecnológica, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
Ministerio de Economía y Competitividad
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv ZVI-assisted Fenton
Azo Dyes
PH dependent mechanism
Advanced oxidation processes
Wastewater treatment
QUIMICA FISICA
topic ZVI-assisted Fenton
Azo Dyes
PH dependent mechanism
Advanced oxidation processes
Wastewater treatment
QUIMICA FISICA
description [EN] The chemical decolorization of the azo-dye Acid Black 1 (AB1) by ZVI-assisted Fenton systems was investigated for assessing the relative importance of reductive and oxidative pathways. To this end, system evolution was followed by UV-vis, HPLC, CG-MS, TOC and toxicity measurements. The effects of reaction conditions including initial pH, oxidants (O-2 and H2O2) concentrations, ZVI loading, and the presence of SO42- were studied. Mechanistic issues were addressed by following H2O2, Fe(II), Fe(III) and pH profiles, as well as by performing experiments in the presence of iron-complexing agents (o-phenanthroline and EDTA) or reactive species scavengers (2-propanol and DMSO). Results show that AB1 reduction occurs through heterogeneous processes with moderate to low pH dependent rates, whereas AB1 oxidation is ruled by the Fenton reaction with significantly pH dependent rates. Mechanistic studies demonstrated that AB1 decolorization in ZVI-assisted Fenton systems involves both oxidative and reductive pathways, whose relative contributions significantly change as the initial pH is raised from 3 to 5. In acidic media, AB1 is mostly transformed by oxidative pathways linked to H2O2 consumption. In contrast, in circumneutral media, a rather inefficient H2O2 consumption leads to similar contributions of oxidative and reductive AB1 transformation pathways. A detailed analysis of the pH dependence of the key reactions involved suggests that the overall system behavior is ruled by a shift in the oxidation mechanism of Fe(II) species, as a consequence of the development of a thigh corrosion layer onto ZVI particles at circumneutral pH values.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/117534
url https://riunet.upv.es/handle/10251/117534
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 H2020 645551 Enhancing water quality by developing novel materials for organic pollutant removal in tertiary water treatments
Universidad Nacional de La Plata, Argentina https://doi.org/10.13039/501100003947 11%2FX679
Agencia Nacional de Promoción Científica y Tecnológica, Argentina https://doi.org/10.13039/501100003074 PICT-2012-0423 Búsqueda de las bases moleculares en los procesos mutagénicos, fototóxicos y fotogenotóxicos donde participan las beta-carbolina
Agencia Nacional de Promoción Científica y Tecnológica, Argentina https://doi.org/10.13039/501100003074 PICT-2015-0374 Estudio de los efectos fototóxicos y fotogenotóxicos inducidos por b-carbolinas libres o conjugadas. Bases moleculares de los pr
Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina https://doi.org/10.13039/501100002923 PIP 11220130100236CO
Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 CTQ2015-69832-C4-4-R TECNOLOGIAS EFICIENTES PARA LA ELIMINACION DE CONTAMINANTES DE PREOCUPACION EMERGENTE, CONTENIDOS EN DIRECTIVA 2013%2F39%2FCE O DE RIESGO SIGNIFICATIVO SEGUN DIRECTIVA 2008%2F105%2FCE
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
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spelling Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathwaysDonadelli, Jorge A.Carlos, LucianoGarcia Einschlag, Fernando S.Arqués Sanz, Antonio|||0000-0001-8692-6979ZVI-assisted FentonAzo DyesPH dependent mechanismAdvanced oxidation processesWastewater treatmentQUIMICA FISICA[EN] The chemical decolorization of the azo-dye Acid Black 1 (AB1) by ZVI-assisted Fenton systems was investigated for assessing the relative importance of reductive and oxidative pathways. To this end, system evolution was followed by UV-vis, HPLC, CG-MS, TOC and toxicity measurements. The effects of reaction conditions including initial pH, oxidants (O-2 and H2O2) concentrations, ZVI loading, and the presence of SO42- were studied. Mechanistic issues were addressed by following H2O2, Fe(II), Fe(III) and pH profiles, as well as by performing experiments in the presence of iron-complexing agents (o-phenanthroline and EDTA) or reactive species scavengers (2-propanol and DMSO). Results show that AB1 reduction occurs through heterogeneous processes with moderate to low pH dependent rates, whereas AB1 oxidation is ruled by the Fenton reaction with significantly pH dependent rates. Mechanistic studies demonstrated that AB1 decolorization in ZVI-assisted Fenton systems involves both oxidative and reductive pathways, whose relative contributions significantly change as the initial pH is raised from 3 to 5. In acidic media, AB1 is mostly transformed by oxidative pathways linked to H2O2 consumption. In contrast, in circumneutral media, a rather inefficient H2O2 consumption leads to similar contributions of oxidative and reductive AB1 transformation pathways. A detailed analysis of the pH dependence of the key reactions involved suggests that the overall system behavior is ruled by a shift in the oxidation mechanism of Fe(II) species, as a consequence of the development of a thigh corrosion layer onto ZVI particles at circumneutral pH values.The present work was partially supported by UNLP (11/X679), ANPCyT (PICT-2012-0423, PICT-2015-0374) and CONICET (PIP: 12-2013-01-00236CO). Authors also want to acknowledge the economic support of European Union Call: (H2020-MSCA-RISE-2014, Proyect 645551 (MAT4TREAT). A. Argues and L. Carlos want to acknowledge Spanish Ministerio de Economia y Competividad (CTQ2015-69832, Triceratops Project). A. Donadelli thank the CONICET for his research graduate grant. L. Carlos and F. S. Garcia Einschlag are research members of CONICET.ElsevierDepartamento de Ingeniería Textil y PapeleraEscuela Politécnica Superior de AlcoyGrupo de Procesos de Oxidación AvanzadaUniversidad Nacional de La Plata, ArgentinaAgencia Nacional de Promoción Científica y Tecnológica, ArgentinaConsejo Nacional de Investigaciones Científicas y Técnicas, ArgentinaMinisterio de Economía y CompetitividadRepositorio Institucional de la Universitat Politècnica de València Riunet20182018-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/117534reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengEuropean Commission https://doi.org/10.13039/501100000780 H2020 645551 Enhancing water quality by developing novel materials for organic pollutant removal in tertiary water treatmentsUniversidad Nacional de La Plata, Argentina https://doi.org/10.13039/501100003947 11%2FX679Agencia Nacional de Promoción Científica y Tecnológica, Argentina https://doi.org/10.13039/501100003074 PICT-2012-0423 Búsqueda de las bases moleculares en los procesos mutagénicos, fototóxicos y fotogenotóxicos donde participan las beta-carbolinaAgencia Nacional de Promoción Científica y Tecnológica, Argentina https://doi.org/10.13039/501100003074 PICT-2015-0374 Estudio de los efectos fototóxicos y fotogenotóxicos inducidos por b-carbolinas libres o conjugadas. Bases moleculares de los prConsejo Nacional de Investigaciones Científicas y Técnicas, Argentina https://doi.org/10.13039/501100002923 PIP 11220130100236COMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 CTQ2015-69832-C4-4-R TECNOLOGIAS EFICIENTES PARA LA ELIMINACION DE CONTAMINANTES DE PREOCUPACION EMERGENTE, CONTENIDOS EN DIRECTIVA 2013%2F39%2FCE O DE RIESGO SIGNIFICATIVO SEGUN DIRECTIVA 2008%2F105%2FCEopen accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1175342026-06-13T07:49:27Z
score 15,300724

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