Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption

The electro-oxidation of methylparaben (MeP) was studied using a DSA®-Cl2 in simple electrolysis and hybrid process (electrolysis followed by UV light irradiation), aiming at evaluating the oxidation mechanism, the removal of organic matter and the energy consumption. Analysis of the results reveale...

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Detalhes bibliográficos
Autores: Dionisio, Dawany, Dos Santos, Lucas Henrique Eiras, Rodrigo Rodrigo, Manuel Andrés, Motheo, Artur
Formato: artículo
Fecha de publicación:2020
País:España
Recursos:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29333
Acesso em linha:https://doi.org/10.1016/j.electacta.2020.135901
http://hdl.handle.net/10578/29333
Access Level:acceso abierto
Palavra-chave:Hybrid process
Chloride medium
Buffer solution
Oxidation pathway
Oligomerization
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repository_id_str
spelling Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumptionDionisio, DawanyDos Santos, Lucas Henrique EirasRodrigo Rodrigo, Manuel AndrésMotheo, ArturHybrid processChloride mediumBuffer solutionOxidation pathwayOligomerizationThe electro-oxidation of methylparaben (MeP) was studied using a DSA®-Cl2 in simple electrolysis and hybrid process (electrolysis followed by UV light irradiation), aiming at evaluating the oxidation mechanism, the removal of organic matter and the energy consumption. Analysis of the results revealed that MeP removal is rapid in both processes. However, the formation of a solid byproduct of a polymeric nature, which is probably related to MeP oxidation products, has occurred. Irradiation of UV light in the solution improved the mineralization process by facilitating the degradation of byproducts, including the solid one. Using the hybrid process, mineralization increased by 40% with low additional energy costs. In addition, new aspects about the MeP electrooxidation mechanism were found. The use of the DSA®-Cl2 appears to favor oxidative coupling reactions, resulting in higher molecular weight products prior to aromatic ring breakdown and further mineralization.Elsevier202220222020info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.electacta.2020.135901http://hdl.handle.net/10578/29333reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésBrazilian Federal Agency for the Support and Improvement of Higher Education (CAPES), São Paulo Research Foundation (FAPESP, Brazil) [2016/19662–1, 2016/04825–2, 2017/10118–0 and 2017/20444–1]National Council for Scientific and Technological Development (CNPq, Brazil) [140669/2014–0]Spanish Ministry of Economy, Industry and Competitiveness, European Union through project CTM2016-76197-R (AEI/FEDER, UE)info:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/293332026-05-27T07:36:41Z
dc.title.none.fl_str_mv Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
title Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
spellingShingle Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
Dionisio, Dawany
Hybrid process
Chloride medium
Buffer solution
Oxidation pathway
Oligomerization
title_short Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
title_full Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
title_fullStr Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
title_full_unstemmed Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
title_sort Electro-oxidation of methyl paraben on DSA®-Cl2: UV irradiation, mechanistic aspects and energy consumption
dc.creator.none.fl_str_mv Dionisio, Dawany
Dos Santos, Lucas Henrique Eiras
Rodrigo Rodrigo, Manuel Andrés
Motheo, Artur
author Dionisio, Dawany
author_facet Dionisio, Dawany
Dos Santos, Lucas Henrique Eiras
Rodrigo Rodrigo, Manuel Andrés
Motheo, Artur
author_role author
author2 Dos Santos, Lucas Henrique Eiras
Rodrigo Rodrigo, Manuel Andrés
Motheo, Artur
author2_role author
author
author
dc.subject.none.fl_str_mv Hybrid process
Chloride medium
Buffer solution
Oxidation pathway
Oligomerization
topic Hybrid process
Chloride medium
Buffer solution
Oxidation pathway
Oligomerization
description The electro-oxidation of methylparaben (MeP) was studied using a DSA®-Cl2 in simple electrolysis and hybrid process (electrolysis followed by UV light irradiation), aiming at evaluating the oxidation mechanism, the removal of organic matter and the energy consumption. Analysis of the results revealed that MeP removal is rapid in both processes. However, the formation of a solid byproduct of a polymeric nature, which is probably related to MeP oxidation products, has occurred. Irradiation of UV light in the solution improved the mineralization process by facilitating the degradation of byproducts, including the solid one. Using the hybrid process, mineralization increased by 40% with low additional energy costs. In addition, new aspects about the MeP electrooxidation mechanism were found. The use of the DSA®-Cl2 appears to favor oxidative coupling reactions, resulting in higher molecular weight products prior to aromatic ring breakdown and further mineralization.
publishDate 2020
dc.date.none.fl_str_mv 2020
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.electacta.2020.135901
http://hdl.handle.net/10578/29333
url https://doi.org/10.1016/j.electacta.2020.135901
http://hdl.handle.net/10578/29333
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Brazilian Federal Agency for the Support and Improvement of Higher Education (CAPES), São Paulo Research Foundation (FAPESP, Brazil) [2016/19662–1, 2016/04825–2, 2017/10118–0 and 2017/20444–1]
National Council for Scientific and Technological Development (CNPq, Brazil) [140669/2014–0]
Spanish Ministry of Economy, Industry and Competitiveness, European Union through project CTM2016-76197-R (AEI/FEDER, UE)
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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