UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON

Detalhes bibliográficos
Autor(a) principal: Santana,Cássia Sidney
Data de Publicação: 2019
Outros Autores: Velloso,Camila Cristina Vieira, Aguiar,André
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019000200149
Resumo: The present work evaluated the influence of phenolic mediators (five dihydroxybenzenes and gallic acid) on the decolorization kinetics of phenol red, chromotrope 2R, and methylene blue by Fenton systems. The reactions were performed with H2O2, iron salts as catalysts, and the absence or presence of phenolic mediators. Based on the decolorization data from previous study of our group, the 1st and 2nd order kinetic models were analyzed, as well as the alternative BMG model. It was found that the mediators accelerated the reactions, based in 1st and 2nd order kinetic models. Reactions containing Fe2+ fitted better to the BMG model, while reactions containing Fe3+ fitted better to the 2nd order kinetic model, independent of mediators. Based on the three evaluated kinetic models, pro-oxidant properties were observed for the mediators in Fenton systems.
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spelling UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTONFenton reactionhydroxyl radicaldihydroxybenzenegallic aciddyeThe present work evaluated the influence of phenolic mediators (five dihydroxybenzenes and gallic acid) on the decolorization kinetics of phenol red, chromotrope 2R, and methylene blue by Fenton systems. The reactions were performed with H2O2, iron salts as catalysts, and the absence or presence of phenolic mediators. Based on the decolorization data from previous study of our group, the 1st and 2nd order kinetic models were analyzed, as well as the alternative BMG model. It was found that the mediators accelerated the reactions, based in 1st and 2nd order kinetic models. Reactions containing Fe2+ fitted better to the BMG model, while reactions containing Fe3+ fitted better to the 2nd order kinetic model, independent of mediators. Based on the three evaluated kinetic models, pro-oxidant properties were observed for the mediators in Fenton systems.Sociedade Brasileira de Química2019-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019000200149Química Nova v.42 n.2 2019reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0100-4042.20170316info:eu-repo/semantics/openAccessSantana,Cássia SidneyVelloso,Camila Cristina VieiraAguiar,Andrépor2019-03-25T00:00:00Zoai:scielo:S0100-40422019000200149Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2019-03-25T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
title UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
spellingShingle UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
Santana,Cássia Sidney
Fenton reaction
hydroxyl radical
dihydroxybenzene
gallic acid
dye
title_short UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
title_full UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
title_fullStr UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
title_full_unstemmed UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
title_sort UM ESTUDO CINÉTICO SOBRE A INFLUÊNCIA DE MEDIADORES FENÓLICOS NA DESCOLORAÇÃO DE DIFERENTES CORANTES POR SISTEMAS FENTON
author Santana,Cássia Sidney
author_facet Santana,Cássia Sidney
Velloso,Camila Cristina Vieira
Aguiar,André
author_role author
author2 Velloso,Camila Cristina Vieira
Aguiar,André
author2_role author
author
dc.contributor.author.fl_str_mv Santana,Cássia Sidney
Velloso,Camila Cristina Vieira
Aguiar,André
dc.subject.por.fl_str_mv Fenton reaction
hydroxyl radical
dihydroxybenzene
gallic acid
dye
topic Fenton reaction
hydroxyl radical
dihydroxybenzene
gallic acid
dye
description The present work evaluated the influence of phenolic mediators (five dihydroxybenzenes and gallic acid) on the decolorization kinetics of phenol red, chromotrope 2R, and methylene blue by Fenton systems. The reactions were performed with H2O2, iron salts as catalysts, and the absence or presence of phenolic mediators. Based on the decolorization data from previous study of our group, the 1st and 2nd order kinetic models were analyzed, as well as the alternative BMG model. It was found that the mediators accelerated the reactions, based in 1st and 2nd order kinetic models. Reactions containing Fe2+ fitted better to the BMG model, while reactions containing Fe3+ fitted better to the 2nd order kinetic model, independent of mediators. Based on the three evaluated kinetic models, pro-oxidant properties were observed for the mediators in Fenton systems.
publishDate 2019
dc.date.none.fl_str_mv 2019-02-01
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=S0100-40422019000200149
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019000200149
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.21577/0100-4042.20170316
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 Química Nova v.42 n.2 2019
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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