Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857 |
Resumo: | We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm-2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid. |
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Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type ElectrodeReactive Blue 4photoelectrochemical oxidationDSA® electrodeenvironmental electrochemistryWe investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm-2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid.Sociedade Brasileira de Química2016-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857Journal of the Brazilian Chemical Society v.27 n.5 2016reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20150338info:eu-repo/semantics/openAccessSilva,Rodrigo G. daAndrade,Adalgisa R. deeng2016-05-18T00:00:00Zoai:scielo:S0103-50532016000500857Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2016-05-18T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
title |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
spellingShingle |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode Silva,Rodrigo G. da Reactive Blue 4 photoelectrochemical oxidation DSA® electrode environmental electrochemistry |
title_short |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
title_full |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
title_fullStr |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
title_full_unstemmed |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
title_sort |
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode |
author |
Silva,Rodrigo G. da |
author_facet |
Silva,Rodrigo G. da Andrade,Adalgisa R. de |
author_role |
author |
author2 |
Andrade,Adalgisa R. de |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Silva,Rodrigo G. da Andrade,Adalgisa R. de |
dc.subject.por.fl_str_mv |
Reactive Blue 4 photoelectrochemical oxidation DSA® electrode environmental electrochemistry |
topic |
Reactive Blue 4 photoelectrochemical oxidation DSA® electrode environmental electrochemistry |
description |
We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm-2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-05-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20150338 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.27 n.5 2016 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318178321301504 |