Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies

Detalhes bibliográficos
Autor(a) principal: Pereira,Kerlaine Alexandre Araújo
Data de Publicação: 2014
Outros Autores: Osório,Luizangela Reis, Silva,Marcos Pereira, Sousa,Kaline Soares, Silva Filho,Edson Cavalcanti da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700023
Resumo: Chitosan was modified with acetylacetone and ethylenediamine in the absence of solvent. The new biopolymer obtained from the modification was characterized by elemental analysis and NMR 13C and applied in the removal of diclofenac sodium aqueous solution varying the pH and time. Through elemental analysis was possible to verify a decreasing in C/N relation after reaction with acetylacetone and an increasing after modification with ethylenediamine. From NMR analysis was verified the appearance of peaks around 160-210 ppm in both materials due to free carbonyl groups in the first step of the modification, besides the formation of imine bonds. The adsorption tests showed that the highest value occurred at pH 4 and from the results of the kinetic study was found that maximum adsorption occurred within 45 minutes and experimental data adjusted better to linear adjustment, following pseudo second-order model. The results show a material efficient in the removal of emerging pollutants.
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spelling Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studieschitosanmodificationsorptiondrugdiclofenac sodiumChitosan was modified with acetylacetone and ethylenediamine in the absence of solvent. The new biopolymer obtained from the modification was characterized by elemental analysis and NMR 13C and applied in the removal of diclofenac sodium aqueous solution varying the pH and time. Through elemental analysis was possible to verify a decreasing in C/N relation after reaction with acetylacetone and an increasing after modification with ethylenediamine. From NMR analysis was verified the appearance of peaks around 160-210 ppm in both materials due to free carbonyl groups in the first step of the modification, besides the formation of imine bonds. The adsorption tests showed that the highest value occurred at pH 4 and from the results of the kinetic study was found that maximum adsorption occurred within 45 minutes and experimental data adjusted better to linear adjustment, following pseudo second-order model. The results show a material efficient in the removal of emerging pollutants.ABM, ABC, ABPol2014-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700023Materials Research v.17 suppl.1 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392014005000043info:eu-repo/semantics/openAccessPereira,Kerlaine Alexandre AraújoOsório,Luizangela ReisSilva,Marcos PereiraSousa,Kaline SoaresSilva Filho,Edson Cavalcanti daeng2015-11-06T00:00:00Zoai:scielo:S1516-14392014000700023Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2015-11-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
title Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
spellingShingle Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
Pereira,Kerlaine Alexandre Araújo
chitosan
modification
sorption
drug
diclofenac sodium
title_short Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
title_full Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
title_fullStr Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
title_full_unstemmed Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
title_sort Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
author Pereira,Kerlaine Alexandre Araújo
author_facet Pereira,Kerlaine Alexandre Araújo
Osório,Luizangela Reis
Silva,Marcos Pereira
Sousa,Kaline Soares
Silva Filho,Edson Cavalcanti da
author_role author
author2 Osório,Luizangela Reis
Silva,Marcos Pereira
Sousa,Kaline Soares
Silva Filho,Edson Cavalcanti da
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Pereira,Kerlaine Alexandre Araújo
Osório,Luizangela Reis
Silva,Marcos Pereira
Sousa,Kaline Soares
Silva Filho,Edson Cavalcanti da
dc.subject.por.fl_str_mv chitosan
modification
sorption
drug
diclofenac sodium
topic chitosan
modification
sorption
drug
diclofenac sodium
description Chitosan was modified with acetylacetone and ethylenediamine in the absence of solvent. The new biopolymer obtained from the modification was characterized by elemental analysis and NMR 13C and applied in the removal of diclofenac sodium aqueous solution varying the pH and time. Through elemental analysis was possible to verify a decreasing in C/N relation after reaction with acetylacetone and an increasing after modification with ethylenediamine. From NMR analysis was verified the appearance of peaks around 160-210 ppm in both materials due to free carbonyl groups in the first step of the modification, besides the formation of imine bonds. The adsorption tests showed that the highest value occurred at pH 4 and from the results of the kinetic study was found that maximum adsorption occurred within 45 minutes and experimental data adjusted better to linear adjustment, following pseudo second-order model. The results show a material efficient in the removal of emerging pollutants.
publishDate 2014
dc.date.none.fl_str_mv 2014-08-01
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=S1516-14392014000700023
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392014005000043
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.17 suppl.1 2014
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
_version_ 1754212664695848960

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