Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3

Detalhes bibliográficos
Autor(a) principal: Naser Elddine,H. A.
Data de Publicação: 2015
Outros Autores: Damaj,Z. K., Yazbeck,O. A., Tabbara,M. A., El Jamal,M. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042015000500003
Resumo: The discoloration of the food colorant E131 (Patent Blue V) by K2S2O8 and KIO3 was investigated by spectrophotometric method. The discoloration is first order with respect to the food colorant and the oxidants. The discoloration rate constant increases with the increase in initial concentration of the oxidant and temperature; whereas discoloration decreases with the increase in concentration of E131 and chloride ion. In the presence of persulfate, Cu(II) and Fe(II) have a catalytic effect on discoloration but Ni(II) has not. The thermodynamic parameters (Ea, ΔH#, ΔS#, ΔG#) of the discoloration in the presence and absence of Cu(II) and Fe(II) are calculated.
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spelling Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3Commercial E131K2S2O8KIO3discolorationadvanced oxidationkineticThe discoloration of the food colorant E131 (Patent Blue V) by K2S2O8 and KIO3 was investigated by spectrophotometric method. The discoloration is first order with respect to the food colorant and the oxidants. The discoloration rate constant increases with the increase in initial concentration of the oxidant and temperature; whereas discoloration decreases with the increase in concentration of E131 and chloride ion. In the presence of persulfate, Cu(II) and Fe(II) have a catalytic effect on discoloration but Ni(II) has not. The thermodynamic parameters (Ea, ΔH#, ΔS#, ΔG#) of the discoloration in the presence and absence of Cu(II) and Fe(II) are calculated.Sociedade Portuguesa de Electroquímica2015-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042015000500003Portugaliae Electrochimica Acta v.33 n.5 2015reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042015000500003Naser Elddine,H. A.Damaj,Z. K.Yazbeck,O. A.Tabbara,M. A.El Jamal,M. M.info:eu-repo/semantics/openAccess2024-02-06T17:07:19Zoai:scielo:S0872-19042015000500003Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:20:17.445028Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
title Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
spellingShingle Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
Naser Elddine,H. A.
Commercial E131
K2S2O8
KIO3
discoloration
advanced oxidation
kinetic
title_short Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
title_full Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
title_fullStr Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
title_full_unstemmed Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
title_sort Kinetic Study of the Discoloration of the Food Colorant E131 by K2S2O8 and KIO3
author Naser Elddine,H. A.
author_facet Naser Elddine,H. A.
Damaj,Z. K.
Yazbeck,O. A.
Tabbara,M. A.
El Jamal,M. M.
author_role author
author2 Damaj,Z. K.
Yazbeck,O. A.
Tabbara,M. A.
El Jamal,M. M.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Naser Elddine,H. A.
Damaj,Z. K.
Yazbeck,O. A.
Tabbara,M. A.
El Jamal,M. M.
dc.subject.por.fl_str_mv Commercial E131
K2S2O8
KIO3
discoloration
advanced oxidation
kinetic
topic Commercial E131
K2S2O8
KIO3
discoloration
advanced oxidation
kinetic
description The discoloration of the food colorant E131 (Patent Blue V) by K2S2O8 and KIO3 was investigated by spectrophotometric method. The discoloration is first order with respect to the food colorant and the oxidants. The discoloration rate constant increases with the increase in initial concentration of the oxidant and temperature; whereas discoloration decreases with the increase in concentration of E131 and chloride ion. In the presence of persulfate, Cu(II) and Fe(II) have a catalytic effect on discoloration but Ni(II) has not. The thermodynamic parameters (Ea, ΔH#, ΔS#, ΔG#) of the discoloration in the presence and absence of Cu(II) and Fe(II) are calculated.
publishDate 2015
dc.date.none.fl_str_mv 2015-09-01
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://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042015000500003
url http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042015000500003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042015000500003
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 Portuguesa de Electroquímica
publisher.none.fl_str_mv Sociedade Portuguesa de Electroquímica
dc.source.none.fl_str_mv Portugaliae Electrochimica Acta v.33 n.5 2015
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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