ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU

Detalhes bibliográficos
Autor(a) principal: Friedrich,Leidi C.
Data de Publicação: 2017
Outros Autores: Zanta,Carmem Lúcia P. S., Machulek Jr.,Amilcar, Quina,Frank H.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000700769
Resumo: Although the classical Fenton process exhibits a high initial rate of the organic compounds degradation, this process is not complete due to the formation of refractory compounds which resist the attack of the hydroxyl radicals. In the presence of Cu(II), the degradation is slower, but results in a greater reduction of TOC (total organic carbon) measurements of net mineralization at the end of the reaction (t=120min). The addition of Cu(II) ions to classical Fenton reaction conditions (Fe(II) plus H2O2 at pH 3) is shown to accelerate the degradation of organic compounds. This synergic effect causes an approximately 15% additional reduction of the TOC. Voltammetric studies confirm the catalytic role of catechol in the presence of Fe(III)/Fe(II) and Cu(II)/Cu(I). Addition of aliphatic acids to the reaction medium, did not interfere with the cupro-Fenton reaction, but had an inhibitory effect on the classical Fenton reaction, consistent with the following order of interaction with the ion Fe(III): Oxalic Acid (OA) >> Formic Acid (FA) ~ Acetic acid (AA).
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spelling ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITUphenolcopper ions and Fenton reactionAlthough the classical Fenton process exhibits a high initial rate of the organic compounds degradation, this process is not complete due to the formation of refractory compounds which resist the attack of the hydroxyl radicals. In the presence of Cu(II), the degradation is slower, but results in a greater reduction of TOC (total organic carbon) measurements of net mineralization at the end of the reaction (t=120min). The addition of Cu(II) ions to classical Fenton reaction conditions (Fe(II) plus H2O2 at pH 3) is shown to accelerate the degradation of organic compounds. This synergic effect causes an approximately 15% additional reduction of the TOC. Voltammetric studies confirm the catalytic role of catechol in the presence of Fe(III)/Fe(II) and Cu(II)/Cu(I). Addition of aliphatic acids to the reaction medium, did not interfere with the cupro-Fenton reaction, but had an inhibitory effect on the classical Fenton reaction, consistent with the following order of interaction with the ion Fe(III): Oxalic Acid (OA) >> Formic Acid (FA) ~ Acetic acid (AA).Sociedade Brasileira de Química2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000700769Química Nova v.40 n.7 2017reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0100-4042.20170065info:eu-repo/semantics/openAccessFriedrich,Leidi C.Zanta,Carmem Lúcia P. S.Machulek Jr.,AmilcarQuina,Frank H.por2017-09-15T00:00:00Zoai:scielo:S0100-40422017000700769Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2017-09-15T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
title ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
spellingShingle ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
Friedrich,Leidi C.
phenol
copper ions and Fenton reaction
title_short ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
title_full ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
title_fullStr ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
title_full_unstemmed ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
title_sort ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
author Friedrich,Leidi C.
author_facet Friedrich,Leidi C.
Zanta,Carmem Lúcia P. S.
Machulek Jr.,Amilcar
Quina,Frank H.
author_role author
author2 Zanta,Carmem Lúcia P. S.
Machulek Jr.,Amilcar
Quina,Frank H.
author2_role author
author
author
dc.contributor.author.fl_str_mv Friedrich,Leidi C.
Zanta,Carmem Lúcia P. S.
Machulek Jr.,Amilcar
Quina,Frank H.
dc.subject.por.fl_str_mv phenol
copper ions and Fenton reaction
topic phenol
copper ions and Fenton reaction
description Although the classical Fenton process exhibits a high initial rate of the organic compounds degradation, this process is not complete due to the formation of refractory compounds which resist the attack of the hydroxyl radicals. In the presence of Cu(II), the degradation is slower, but results in a greater reduction of TOC (total organic carbon) measurements of net mineralization at the end of the reaction (t=120min). The addition of Cu(II) ions to classical Fenton reaction conditions (Fe(II) plus H2O2 at pH 3) is shown to accelerate the degradation of organic compounds. This synergic effect causes an approximately 15% additional reduction of the TOC. Voltammetric studies confirm the catalytic role of catechol in the presence of Fe(III)/Fe(II) and Cu(II)/Cu(I). Addition of aliphatic acids to the reaction medium, did not interfere with the cupro-Fenton reaction, but had an inhibitory effect on the classical Fenton reaction, consistent with the following order of interaction with the ion Fe(III): Oxalic Acid (OA) >> Formic Acid (FA) ~ Acetic acid (AA).
publishDate 2017
dc.date.none.fl_str_mv 2017-08-01
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=S0100-40422017000700769
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000700769
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.21577/0100-4042.20170065
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.40 n.7 2017
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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