Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.chemosphere.2020.126674 http://hdl.handle.net/11449/198774 |
Resumo: | Dimensionally stable anodes (DSA) have been widely used to degrade organic compounds because these surfaces promote the electrogeneration of active chlorine species in the bulk of the solution, as well as in the vicinity of the anode when NaCl is used as supporting electrolyte. In this work, the nanoparticles synthesis of IrO2 and RuO2 was performed to obtain two types of DSA electrodes named Class I and II to degrade oxamic acid. For Class I and II DSA, the nanoparticles used were synthesized separately and in the same reaction medium, respectively. Electrolysis were carried out in an open cylindrical cell without division at 25 °C, DSAs were used as anodes and a stainless-steel electrode as cathode, both elements have a geometric area of 2.8 cm2 immersed in 0.05 mol L−1 of NaCl or Na2SO4 and a current density of 3 mA cm−2 was applied for 6 h. Active chlorine species generated in the absence of oxamic acid in NaCl were also detected and quantified through ion chromatography. In Na2SO4 there was no degradation of the compound, but in NaCl the oxamic acid concentration reaching 85% with Class I DSA. The same tendency is observed in mineralization, in which Class I DSA allowed reaching a CO2 transformation close to 73%. The difference in the results occurs because with Class I DSA, more hypochlorite is generated than with Class II and therefore there is a larger amount of oxidizing species in the solution that enables the degradation and mineralization of oxamic acid. |
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Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticlesAnodic-oxidationDegradationDimensionally stable anodeOxamic acidDimensionally stable anodes (DSA) have been widely used to degrade organic compounds because these surfaces promote the electrogeneration of active chlorine species in the bulk of the solution, as well as in the vicinity of the anode when NaCl is used as supporting electrolyte. In this work, the nanoparticles synthesis of IrO2 and RuO2 was performed to obtain two types of DSA electrodes named Class I and II to degrade oxamic acid. For Class I and II DSA, the nanoparticles used were synthesized separately and in the same reaction medium, respectively. Electrolysis were carried out in an open cylindrical cell without division at 25 °C, DSAs were used as anodes and a stainless-steel electrode as cathode, both elements have a geometric area of 2.8 cm2 immersed in 0.05 mol L−1 of NaCl or Na2SO4 and a current density of 3 mA cm−2 was applied for 6 h. Active chlorine species generated in the absence of oxamic acid in NaCl were also detected and quantified through ion chromatography. In Na2SO4 there was no degradation of the compound, but in NaCl the oxamic acid concentration reaching 85% with Class I DSA. The same tendency is observed in mineralization, in which Class I DSA allowed reaching a CO2 transformation close to 73%. The difference in the results occurs because with Class I DSA, more hypochlorite is generated than with Class II and therefore there is a larger amount of oxidizing species in the solution that enables the degradation and mineralization of oxamic acid.Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Santiago de ChileFondo Nacional de Desarrollo Científico y TecnológicoLaboratorio de Electroquímica Del Medio Ambiente LEQMA. Departamento de Química de los Materiales Facultad de Química y Biología.Universidad de Santiago de Chile, USACHFacultad de Química and Biología CEDENNA Universidad de Santiago de Chile, USACHLaboratorio de síntesis y Modificación de Nanoestructuras y Materiales Bidimensionales. Centro de Investigación en Materiales Avanzados S.C. (CIMAV)Laboratorio de Materiais Magneticos e Coloides Departamento de Fisicoquímica São Paulo State University,UNESPLaboratorio de Materiais Magneticos e Coloides Departamento de Fisicoquímica São Paulo State University,UNESPFondo Nacional de Desarrollo Científico y Tecnológico: 1170352Facultad de Química y Biología.Universidad de Santiago de ChileUniversidad de Santiago de ChileLaboratorio de síntesis y Modificación de Nanoestructuras y Materiales Bidimensionales. Centro de Investigación en Materiales Avanzados S.C. (CIMAV)Universidade Estadual Paulista (Unesp)Espinoza, L. CarolinaSepúlveda, PamelaGarcía, AlejandraMartins de Godoi, Denis [UNESP]Salazar, Ricardo2020-12-12T01:21:42Z2020-12-12T01:21:42Z2020-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.chemosphere.2020.126674Chemosphere, v. 251.1879-12980045-6535http://hdl.handle.net/11449/19877410.1016/j.chemosphere.2020.1266742-s2.0-85083888260Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemosphereinfo:eu-repo/semantics/openAccess2021-10-22T20:18:18Zoai:repositorio.unesp.br:11449/198774Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:35:16.447955Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
title |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
spellingShingle |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles Espinoza, L. Carolina Anodic-oxidation Degradation Dimensionally stable anode Oxamic acid |
title_short |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
title_full |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
title_fullStr |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
title_full_unstemmed |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
title_sort |
Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles |
author |
Espinoza, L. Carolina |
author_facet |
Espinoza, L. Carolina Sepúlveda, Pamela García, Alejandra Martins de Godoi, Denis [UNESP] Salazar, Ricardo |
author_role |
author |
author2 |
Sepúlveda, Pamela García, Alejandra Martins de Godoi, Denis [UNESP] Salazar, Ricardo |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Facultad de Química y Biología.Universidad de Santiago de Chile Universidad de Santiago de Chile Laboratorio de síntesis y Modificación de Nanoestructuras y Materiales Bidimensionales. Centro de Investigación en Materiales Avanzados S.C. (CIMAV) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Espinoza, L. Carolina Sepúlveda, Pamela García, Alejandra Martins de Godoi, Denis [UNESP] Salazar, Ricardo |
dc.subject.por.fl_str_mv |
Anodic-oxidation Degradation Dimensionally stable anode Oxamic acid |
topic |
Anodic-oxidation Degradation Dimensionally stable anode Oxamic acid |
description |
Dimensionally stable anodes (DSA) have been widely used to degrade organic compounds because these surfaces promote the electrogeneration of active chlorine species in the bulk of the solution, as well as in the vicinity of the anode when NaCl is used as supporting electrolyte. In this work, the nanoparticles synthesis of IrO2 and RuO2 was performed to obtain two types of DSA electrodes named Class I and II to degrade oxamic acid. For Class I and II DSA, the nanoparticles used were synthesized separately and in the same reaction medium, respectively. Electrolysis were carried out in an open cylindrical cell without division at 25 °C, DSAs were used as anodes and a stainless-steel electrode as cathode, both elements have a geometric area of 2.8 cm2 immersed in 0.05 mol L−1 of NaCl or Na2SO4 and a current density of 3 mA cm−2 was applied for 6 h. Active chlorine species generated in the absence of oxamic acid in NaCl were also detected and quantified through ion chromatography. In Na2SO4 there was no degradation of the compound, but in NaCl the oxamic acid concentration reaching 85% with Class I DSA. The same tendency is observed in mineralization, in which Class I DSA allowed reaching a CO2 transformation close to 73%. The difference in the results occurs because with Class I DSA, more hypochlorite is generated than with Class II and therefore there is a larger amount of oxidizing species in the solution that enables the degradation and mineralization of oxamic acid. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:21:42Z 2020-12-12T01:21:42Z 2020-07-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.chemosphere.2020.126674 Chemosphere, v. 251. 1879-1298 0045-6535 http://hdl.handle.net/11449/198774 10.1016/j.chemosphere.2020.126674 2-s2.0-85083888260 |
url |
http://dx.doi.org/10.1016/j.chemosphere.2020.126674 http://hdl.handle.net/11449/198774 |
identifier_str_mv |
Chemosphere, v. 251. 1879-1298 0045-6535 10.1016/j.chemosphere.2020.126674 2-s2.0-85083888260 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Chemosphere |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129339335639040 |