Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale

The treatment of 0.348 mM carbofuran solutions in 0.050 M Na2SO4 at pH 3.0 has been studied by electrochemical oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF). The trials were performed in a 2.5 L pre-pilot plant equipped with a filter-press cell, wh...

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Autores: Thiam, Abdoulaye, Salazar, Ricardo, Brillas, Enric, Sirés Sadornil, Ignacio
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/152739
Acceso en línea:https://hdl.handle.net/2445/152739
Access Level:acceso abierto
Palabra clave:Oxidació electroquímica
Depuració d'aigües residuals
Electrolytic oxidation
Purification of sewage
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spelling Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scaleThiam, AbdoulayeSalazar, RicardoBrillas, EnricSirés Sadornil, IgnacioOxidació electroquímicaDepuració d'aigües residualsElectrolytic oxidationPurification of sewageThe treatment of 0.348 mM carbofuran solutions in 0.050 M Na2SO4 at pH 3.0 has been studied by electrochemical oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF). The trials were performed in a 2.5 L pre-pilot plant equipped with a filter-press cell, which contained a RuO2-based anode and an air-diffusion cathode, connected to an annular photoreactor with a 160 W UVA lamp in PEF. The oxidizing species were the ¿OH generated at the anode from water oxidation and in the bulk from Fenton's reaction between added Fe2+ and H2O2 produced at the cathode. The oxidation power of treatments rose in the order EO-H2O2 << EF < PEF, demonstrating the preponderant role of ¿OH in the bulk. The drug decay always obeyed a pseudo-first order kinetics. Similar TOC abatements of 82%-88% were found in PEF operating at different current densities and carbofuran concentrations, ascribed to the additional photolytic action of UVA light to remove photoactive intermediates, also allowing a gradual detoxification. In matrices with Cl-, active chlorine was also produced as oxidant and its quick reaction with carbofuran caused its faster decay at increasing Cl- content. However, lower mineralization was achieved because of the accumulation of recalcitrant chloroderivatives. GC-MS analysis of treated solutions with 0.070 M NaCl corroborated the formation of 6 chloroderivatives, whereas 5 heteroaromatics were detected in 0.050 M Na2SO4. Oxalic acid was accumulated in the latter medium since its Fe(III) complexes were stable in EF and rapidly mineralized by UVA light in PEF. The mineralization of urban wastewater spiked with carbofuran by PEF in the pre-pilot plant was partial due to the recalcitrant chloroderivatives formed from carbofuran and natural organic matter.Elsevier B.V.2020202020182020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion12 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/152739Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.cej.2017.10.137Chemical Engineering Journal, 2018, vol. 335, p. 133-144https://doi.org/10.1016/j.cej.2017.10.137cc-by-nc-nd (c) Elsevier B.V., 2018http://creativecommons.org/licenses/by-nc-nd/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1527392026-05-29T05:05:01Z
dc.title.none.fl_str_mv Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
title Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
spellingShingle Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
Thiam, Abdoulaye
Oxidació electroquímica
Depuració d'aigües residuals
Electrolytic oxidation
Purification of sewage
title_short Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
title_full Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
title_fullStr Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
title_full_unstemmed Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
title_sort Electrochemical advanced oxidation of carbofuran in aqueous sulfate and/or chloride media using a flow cell with a RuO2-based anode and an air diffusion cathode at pre-pilot scale
dc.creator.none.fl_str_mv Thiam, Abdoulaye
Salazar, Ricardo
Brillas, Enric
Sirés Sadornil, Ignacio
author Thiam, Abdoulaye
author_facet Thiam, Abdoulaye
Salazar, Ricardo
Brillas, Enric
Sirés Sadornil, Ignacio
author_role author
author2 Salazar, Ricardo
Brillas, Enric
Sirés Sadornil, Ignacio
author2_role author
author
author
dc.subject.none.fl_str_mv Oxidació electroquímica
Depuració d'aigües residuals
Electrolytic oxidation
Purification of sewage
topic Oxidació electroquímica
Depuració d'aigües residuals
Electrolytic oxidation
Purification of sewage
description The treatment of 0.348 mM carbofuran solutions in 0.050 M Na2SO4 at pH 3.0 has been studied by electrochemical oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF). The trials were performed in a 2.5 L pre-pilot plant equipped with a filter-press cell, which contained a RuO2-based anode and an air-diffusion cathode, connected to an annular photoreactor with a 160 W UVA lamp in PEF. The oxidizing species were the ¿OH generated at the anode from water oxidation and in the bulk from Fenton's reaction between added Fe2+ and H2O2 produced at the cathode. The oxidation power of treatments rose in the order EO-H2O2 << EF < PEF, demonstrating the preponderant role of ¿OH in the bulk. The drug decay always obeyed a pseudo-first order kinetics. Similar TOC abatements of 82%-88% were found in PEF operating at different current densities and carbofuran concentrations, ascribed to the additional photolytic action of UVA light to remove photoactive intermediates, also allowing a gradual detoxification. In matrices with Cl-, active chlorine was also produced as oxidant and its quick reaction with carbofuran caused its faster decay at increasing Cl- content. However, lower mineralization was achieved because of the accumulation of recalcitrant chloroderivatives. GC-MS analysis of treated solutions with 0.070 M NaCl corroborated the formation of 6 chloroderivatives, whereas 5 heteroaromatics were detected in 0.050 M Na2SO4. Oxalic acid was accumulated in the latter medium since its Fe(III) complexes were stable in EF and rapidly mineralized by UVA light in PEF. The mineralization of urban wastewater spiked with carbofuran by PEF in the pre-pilot plant was partial due to the recalcitrant chloroderivatives formed from carbofuran and natural organic matter.
publishDate 2018
dc.date.none.fl_str_mv 2018
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/152739
url https://hdl.handle.net/2445/152739
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.cej.2017.10.137
Chemical Engineering Journal, 2018, vol. 335, p. 133-144
https://doi.org/10.1016/j.cej.2017.10.137
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier B.V., 2018
http://creativecommons.org/licenses/by-nc-nd/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier B.V., 2018
http://creativecommons.org/licenses/by-nc-nd/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 12 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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