Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados

Detalhes bibliográficos
Autor(a) principal: Debrassi,Aline
Data de Publicação: 2011
Outros Autores: Largura,Maria Claudia Tonelli, Rodrigues,Clóvis Antonio
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000500007
Resumo: Hydrophobically modified O-carboxymethylchitosan derivatives were synthesized through a reaction with lauroyl chloride and applied for adsorption of congo red dye. The Langmuir-Freundlich isotherm model was found to be the most suitable one for the VC adsorption and maximum adsorption capacity obtained was 281.97 mg g-1 at a pH value of 7.0 for HL 1.0. The adsorption process follows the pseudo-second-order kinetics and the corresponding rate constants were obtained. The thermodynamic parameters showed that adsorption process is spontaneous (positive ∆Hº) and favorable (negative ∆Gº). The hydrophobic derivatives are able to adsorb the dye even in high pH values.
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spelling Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificadosadsorptioncongo redO-carboxymethylchitosanHydrophobically modified O-carboxymethylchitosan derivatives were synthesized through a reaction with lauroyl chloride and applied for adsorption of congo red dye. The Langmuir-Freundlich isotherm model was found to be the most suitable one for the VC adsorption and maximum adsorption capacity obtained was 281.97 mg g-1 at a pH value of 7.0 for HL 1.0. The adsorption process follows the pseudo-second-order kinetics and the corresponding rate constants were obtained. The thermodynamic parameters showed that adsorption process is spontaneous (positive ∆Hº) and favorable (negative ∆Gº). The hydrophobic derivatives are able to adsorb the dye even in high pH values.Sociedade Brasileira de Química2011-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000500007Química Nova v.34 n.5 2011reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422011000500007info:eu-repo/semantics/openAccessDebrassi,AlineLargura,Maria Claudia TonelliRodrigues,Clóvis Antoniopor2011-07-18T00:00:00Zoai:scielo:S0100-40422011000500007Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2011-07-18T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
title Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
spellingShingle Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
Debrassi,Aline
adsorption
congo red
O-carboxymethylchitosan
title_short Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
title_full Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
title_fullStr Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
title_full_unstemmed Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
title_sort Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
author Debrassi,Aline
author_facet Debrassi,Aline
Largura,Maria Claudia Tonelli
Rodrigues,Clóvis Antonio
author_role author
author2 Largura,Maria Claudia Tonelli
Rodrigues,Clóvis Antonio
author2_role author
author
dc.contributor.author.fl_str_mv Debrassi,Aline
Largura,Maria Claudia Tonelli
Rodrigues,Clóvis Antonio
dc.subject.por.fl_str_mv adsorption
congo red
O-carboxymethylchitosan
topic adsorption
congo red
O-carboxymethylchitosan
description Hydrophobically modified O-carboxymethylchitosan derivatives were synthesized through a reaction with lauroyl chloride and applied for adsorption of congo red dye. The Langmuir-Freundlich isotherm model was found to be the most suitable one for the VC adsorption and maximum adsorption capacity obtained was 281.97 mg g-1 at a pH value of 7.0 for HL 1.0. The adsorption process follows the pseudo-second-order kinetics and the corresponding rate constants were obtained. The thermodynamic parameters showed that adsorption process is spontaneous (positive ∆Hº) and favorable (negative ∆Gº). The hydrophobic derivatives are able to adsorb the dye even in high pH values.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01
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=S0100-40422011000500007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000500007
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422011000500007
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.34 n.5 2011
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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