Adsorção do corante vermelho congo por derivados da o-carboximetilquitosana hidrofobicamente modificados
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , |
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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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 |
_version_ |
1750318111944343552 |