A physico-chemical study of the cationic surfactants adsorption on montmorillonite

Detalhes bibliográficos
Autor(a) principal: Praus,Petr
Data de Publicação: 2007
Outros Autores: Turicová,Martina
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200020
Resumo: The adsorption of cetyltrimethylammonium (CTA) bromide and cetylpyridinium (CP) chloride on Na+-rich montmorillonite (MMT) was studied. An ad hoc isotachophoretic (ITP) method was developed for the simultaneous and rapid determination of the cationic surfactants (CSs) adsorbed. In order to decrease the detection limits, ITP was on-line coupled with capillary zone electrophoresis. Adsorption data were analysed by their fitting with adsorption isotherms. The adsorption of CP is well described by the Langmuir isotherm. It indicates the monolayer arrangement of CP on the MMT surface. In case of the CTA data, the best fitting Langmuir-Freundlich model with the power constant r<1 was found. It can be explained by the CTA interactions because of its intercalation into the MMT interlayer space.
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spelling A physico-chemical study of the cationic surfactants adsorption on montmorilloniteadsorption isothermsmontmorillonitecetyltrimethylammoniumcetylpyridiniumcapillary isotachophoresisThe adsorption of cetyltrimethylammonium (CTA) bromide and cetylpyridinium (CP) chloride on Na+-rich montmorillonite (MMT) was studied. An ad hoc isotachophoretic (ITP) method was developed for the simultaneous and rapid determination of the cationic surfactants (CSs) adsorbed. In order to decrease the detection limits, ITP was on-line coupled with capillary zone electrophoresis. Adsorption data were analysed by their fitting with adsorption isotherms. The adsorption of CP is well described by the Langmuir isotherm. It indicates the monolayer arrangement of CP on the MMT surface. In case of the CTA data, the best fitting Langmuir-Freundlich model with the power constant r<1 was found. It can be explained by the CTA interactions because of its intercalation into the MMT interlayer space.Sociedade Brasileira de Química2007-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200020Journal of the Brazilian Chemical Society v.18 n.2 2007reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532007000200020info:eu-repo/semantics/openAccessPraus,PetrTuricová,Martinaeng2007-06-13T00:00:00Zoai:scielo:S0103-50532007000200020Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2007-06-13T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv A physico-chemical study of the cationic surfactants adsorption on montmorillonite
title A physico-chemical study of the cationic surfactants adsorption on montmorillonite
spellingShingle A physico-chemical study of the cationic surfactants adsorption on montmorillonite
Praus,Petr
adsorption isotherms
montmorillonite
cetyltrimethylammonium
cetylpyridinium
capillary isotachophoresis
title_short A physico-chemical study of the cationic surfactants adsorption on montmorillonite
title_full A physico-chemical study of the cationic surfactants adsorption on montmorillonite
title_fullStr A physico-chemical study of the cationic surfactants adsorption on montmorillonite
title_full_unstemmed A physico-chemical study of the cationic surfactants adsorption on montmorillonite
title_sort A physico-chemical study of the cationic surfactants adsorption on montmorillonite
author Praus,Petr
author_facet Praus,Petr
Turicová,Martina
author_role author
author2 Turicová,Martina
author2_role author
dc.contributor.author.fl_str_mv Praus,Petr
Turicová,Martina
dc.subject.por.fl_str_mv adsorption isotherms
montmorillonite
cetyltrimethylammonium
cetylpyridinium
capillary isotachophoresis
topic adsorption isotherms
montmorillonite
cetyltrimethylammonium
cetylpyridinium
capillary isotachophoresis
description The adsorption of cetyltrimethylammonium (CTA) bromide and cetylpyridinium (CP) chloride on Na+-rich montmorillonite (MMT) was studied. An ad hoc isotachophoretic (ITP) method was developed for the simultaneous and rapid determination of the cationic surfactants (CSs) adsorbed. In order to decrease the detection limits, ITP was on-line coupled with capillary zone electrophoresis. Adsorption data were analysed by their fitting with adsorption isotherms. The adsorption of CP is well described by the Langmuir isotherm. It indicates the monolayer arrangement of CP on the MMT surface. In case of the CTA data, the best fitting Langmuir-Freundlich model with the power constant r<1 was found. It can be explained by the CTA interactions because of its intercalation into the MMT interlayer space.
publishDate 2007
dc.date.none.fl_str_mv 2007-04-01
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=S0103-50532007000200020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200020
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532007000200020
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 Journal of the Brazilian Chemical Society v.18 n.2 2007
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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