The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes

Detalhes bibliográficos
Autor(a) principal: Escalona-Durán, Florymar
Data de Publicação: 2020
Outros Autores: Ribeiro da Silva, Djalma, Martínez-Huitle, Carlos A. [UNESP], Villegas-Guzman, Paola
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.chemosphere.2020.126599
http://hdl.handle.net/11449/198695
Resumo: It has previously been established during the elimination of organic matter that the addition of sodium dodecyl sulfate in solution is an important condition in the electrochemical oxidation approach that allows to increase the production of persulfate, enhancing the efficacy of the treatment. This outcome was observed when using the anodic oxidation with boron doped diamond (BDD), the extra production of persulfate was achieved after the SDS-sulfate released in solution and it reacts with hydroxyl radicals electrogenerated at BDD surface. However, this effect was not already tested by using active anodes. For this reason, the effect of sodium dodecyl sulfate (SDS) during the electrochemical treatment of caffeine was investigated by comparing non-active and active anodes performances. A significant decrease on the oxidation efficiency of caffeine was observed by using Ti/IrO2–Ta2O5 anode at high current density when SDS was added to the solution. Conversely, at BDD anode, the presence of SDS enhanced the degradation efficiency, depending on the applied current density. This behavior is mainly due to the degradation of SDS molecules, which allows to increase the amount of sulfate in solution, promoting the production of persulfate via the mechanism involving hydroxyl radicals when BDD is used. Meanwhile, no oxidation improvements were observed when Ti/IrO2–Ta2O5 anode was employed, limiting the caffeine oxidation. Results clearly showed that the surfactant concentration had little influence on the degradation efficiency, but this result is satisfactory for the BDD system, since it demonstrates that effluents with complex matrices containing surfactants could be effectively degraded using the electrooxidation technique. Degradation mechanisms were explained by electrochemical measurements (polarization curves) as well as the kinetic analysis. Costs and energy consumption were also evaluated.
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spelling The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodesBoron doped diamondMechanismsOxidantsPersulfateSurfactantIt has previously been established during the elimination of organic matter that the addition of sodium dodecyl sulfate in solution is an important condition in the electrochemical oxidation approach that allows to increase the production of persulfate, enhancing the efficacy of the treatment. This outcome was observed when using the anodic oxidation with boron doped diamond (BDD), the extra production of persulfate was achieved after the SDS-sulfate released in solution and it reacts with hydroxyl radicals electrogenerated at BDD surface. However, this effect was not already tested by using active anodes. For this reason, the effect of sodium dodecyl sulfate (SDS) during the electrochemical treatment of caffeine was investigated by comparing non-active and active anodes performances. A significant decrease on the oxidation efficiency of caffeine was observed by using Ti/IrO2–Ta2O5 anode at high current density when SDS was added to the solution. Conversely, at BDD anode, the presence of SDS enhanced the degradation efficiency, depending on the applied current density. This behavior is mainly due to the degradation of SDS molecules, which allows to increase the amount of sulfate in solution, promoting the production of persulfate via the mechanism involving hydroxyl radicals when BDD is used. Meanwhile, no oxidation improvements were observed when Ti/IrO2–Ta2O5 anode was employed, limiting the caffeine oxidation. Results clearly showed that the surfactant concentration had little influence on the degradation efficiency, but this result is satisfactory for the BDD system, since it demonstrates that effluents with complex matrices containing surfactants could be effectively degraded using the electrooxidation technique. Degradation mechanisms were explained by electrochemical measurements (polarization curves) as well as the kinetic analysis. Costs and energy consumption were also evaluated.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Institute of Chemistry Environmental and Applied Electrochemistry Laboratory Federal University of Rio Grande do Norte, Lagoa Nova, CEPNational Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Unesp, P.O. Box 355Centro de Investigaciones UNINAVARRA – CINA Fundación Universitaria Navarra – UNINAVARRA, Calle 10 No. 6 - 41. Primer Piso, HuilaNational Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Unesp, P.O. Box 355FAPESP: 2014/50945–4CNPq: CNPq – 439344/2018–2Federal University of Rio Grande do NorteUniversidade Estadual Paulista (Unesp)Fundación Universitaria Navarra – UNINAVARRAEscalona-Durán, FlorymarRibeiro da Silva, DjalmaMartínez-Huitle, Carlos A. [UNESP]Villegas-Guzman, Paola2020-12-12T01:19:40Z2020-12-12T01:19:40Z2020-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.chemosphere.2020.126599Chemosphere, v. 253.1879-12980045-6535http://hdl.handle.net/11449/19869510.1016/j.chemosphere.2020.1265992-s2.0-85082754682Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemosphereinfo:eu-repo/semantics/openAccess2021-10-22T19:32:44Zoai:repositorio.unesp.br:11449/198695Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:17:10.071790Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
title The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
spellingShingle The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
Escalona-Durán, Florymar
Boron doped diamond
Mechanisms
Oxidants
Persulfate
Surfactant
title_short The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
title_full The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
title_fullStr The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
title_full_unstemmed The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
title_sort The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes
author Escalona-Durán, Florymar
author_facet Escalona-Durán, Florymar
Ribeiro da Silva, Djalma
Martínez-Huitle, Carlos A. [UNESP]
Villegas-Guzman, Paola
author_role author
author2 Ribeiro da Silva, Djalma
Martínez-Huitle, Carlos A. [UNESP]
Villegas-Guzman, Paola
author2_role author
author
author
dc.contributor.none.fl_str_mv Federal University of Rio Grande do Norte
Universidade Estadual Paulista (Unesp)
Fundación Universitaria Navarra – UNINAVARRA
dc.contributor.author.fl_str_mv Escalona-Durán, Florymar
Ribeiro da Silva, Djalma
Martínez-Huitle, Carlos A. [UNESP]
Villegas-Guzman, Paola
dc.subject.por.fl_str_mv Boron doped diamond
Mechanisms
Oxidants
Persulfate
Surfactant
topic Boron doped diamond
Mechanisms
Oxidants
Persulfate
Surfactant
description It has previously been established during the elimination of organic matter that the addition of sodium dodecyl sulfate in solution is an important condition in the electrochemical oxidation approach that allows to increase the production of persulfate, enhancing the efficacy of the treatment. This outcome was observed when using the anodic oxidation with boron doped diamond (BDD), the extra production of persulfate was achieved after the SDS-sulfate released in solution and it reacts with hydroxyl radicals electrogenerated at BDD surface. However, this effect was not already tested by using active anodes. For this reason, the effect of sodium dodecyl sulfate (SDS) during the electrochemical treatment of caffeine was investigated by comparing non-active and active anodes performances. A significant decrease on the oxidation efficiency of caffeine was observed by using Ti/IrO2–Ta2O5 anode at high current density when SDS was added to the solution. Conversely, at BDD anode, the presence of SDS enhanced the degradation efficiency, depending on the applied current density. This behavior is mainly due to the degradation of SDS molecules, which allows to increase the amount of sulfate in solution, promoting the production of persulfate via the mechanism involving hydroxyl radicals when BDD is used. Meanwhile, no oxidation improvements were observed when Ti/IrO2–Ta2O5 anode was employed, limiting the caffeine oxidation. Results clearly showed that the surfactant concentration had little influence on the degradation efficiency, but this result is satisfactory for the BDD system, since it demonstrates that effluents with complex matrices containing surfactants could be effectively degraded using the electrooxidation technique. Degradation mechanisms were explained by electrochemical measurements (polarization curves) as well as the kinetic analysis. Costs and energy consumption were also evaluated.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T01:19:40Z
2020-12-12T01:19:40Z
2020-08-01
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.2020.126599
Chemosphere, v. 253.
1879-1298
0045-6535
http://hdl.handle.net/11449/198695
10.1016/j.chemosphere.2020.126599
2-s2.0-85082754682
url http://dx.doi.org/10.1016/j.chemosphere.2020.126599
http://hdl.handle.net/11449/198695
identifier_str_mv Chemosphere, v. 253.
1879-1298
0045-6535
10.1016/j.chemosphere.2020.126599
2-s2.0-85082754682
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)
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