Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel

Detalhes bibliográficos
Autor(a) principal: Farias,Raquel Studart de
Data de Publicação: 2018
Outros Autores: Buarque,Hugo Leonardo de Brito, Cruz,Mabel Ribeiro da, Cardoso,Luana Meg Freitas, Gondim,Tamyris de Aquino, Paulo,Vanessa Rodrigues de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Engenharia Sanitaria e Ambiental
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-41522018000601053
Resumo: ABSTRACT This study investigates the potential use of amino-functionalized silica gel as an adsorbent for the recovering of congo red dye from aqueous solution. The effects of pH, contact time, and temperature were determined and evaluated. Equilibrium isotherms were also studied. The adsorption kinetics was modeled by pseudo-first order and pseudo-second order. Furthermore, desorption of congo red was preliminarily studied. The pH range from 4.5 to 7.0 was favorable for the adsorption of congo red onto amine modified silica at 25ºC. Higher adsorption capacity was obtained at 50ºC. Langmuir and Freundlich models were fitted to the adsorption equilibrium data. The best fittings were obtained with the pseudo-second order and Langmuir model for kinetics and equilibrium, respectively. Desorption studies suggest that ion exchange might be the major mode of adsorption. KOH solution was the best desorbing agent for recovering the adsorbed dye.
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spelling Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel3-aminopropyltriethoxysilaneanionic dyecolor removalgrafted silicaABSTRACT This study investigates the potential use of amino-functionalized silica gel as an adsorbent for the recovering of congo red dye from aqueous solution. The effects of pH, contact time, and temperature were determined and evaluated. Equilibrium isotherms were also studied. The adsorption kinetics was modeled by pseudo-first order and pseudo-second order. Furthermore, desorption of congo red was preliminarily studied. The pH range from 4.5 to 7.0 was favorable for the adsorption of congo red onto amine modified silica at 25ºC. Higher adsorption capacity was obtained at 50ºC. Langmuir and Freundlich models were fitted to the adsorption equilibrium data. The best fittings were obtained with the pseudo-second order and Langmuir model for kinetics and equilibrium, respectively. Desorption studies suggest that ion exchange might be the major mode of adsorption. KOH solution was the best desorbing agent for recovering the adsorbed dye.Associação Brasileira de Engenharia Sanitária e Ambiental - ABES2018-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-41522018000601053Engenharia Sanitaria e Ambiental v.23 n.6 2018reponame:Engenharia Sanitaria e Ambientalinstname:Associação Brasileira de Engenharia Sanitária e Ambiental (ABES)instacron:ABES10.1590/s1413-41522018172982info:eu-repo/semantics/openAccessFarias,Raquel Studart deBuarque,Hugo Leonardo de BritoCruz,Mabel Ribeiro daCardoso,Luana Meg FreitasGondim,Tamyris de AquinoPaulo,Vanessa Rodrigues deeng2019-07-17T00:00:00Zoai:scielo:S1413-41522018000601053Revistahttp://www.scielo.br/esaONGhttps://old.scielo.br/oai/scielo-oai.php||esa@abes-dn.org.br1809-44571413-4152opendoar:2019-07-17T00:00Engenharia Sanitaria e Ambiental - Associação Brasileira de Engenharia Sanitária e Ambiental (ABES)false
dc.title.none.fl_str_mv Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
title Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
spellingShingle Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
Farias,Raquel Studart de
3-aminopropyltriethoxysilane
anionic dye
color removal
grafted silica
title_short Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
title_full Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
title_fullStr Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
title_full_unstemmed Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
title_sort Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel
author Farias,Raquel Studart de
author_facet Farias,Raquel Studart de
Buarque,Hugo Leonardo de Brito
Cruz,Mabel Ribeiro da
Cardoso,Luana Meg Freitas
Gondim,Tamyris de Aquino
Paulo,Vanessa Rodrigues de
author_role author
author2 Buarque,Hugo Leonardo de Brito
Cruz,Mabel Ribeiro da
Cardoso,Luana Meg Freitas
Gondim,Tamyris de Aquino
Paulo,Vanessa Rodrigues de
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Farias,Raquel Studart de
Buarque,Hugo Leonardo de Brito
Cruz,Mabel Ribeiro da
Cardoso,Luana Meg Freitas
Gondim,Tamyris de Aquino
Paulo,Vanessa Rodrigues de
dc.subject.por.fl_str_mv 3-aminopropyltriethoxysilane
anionic dye
color removal
grafted silica
topic 3-aminopropyltriethoxysilane
anionic dye
color removal
grafted silica
description ABSTRACT This study investigates the potential use of amino-functionalized silica gel as an adsorbent for the recovering of congo red dye from aqueous solution. The effects of pH, contact time, and temperature were determined and evaluated. Equilibrium isotherms were also studied. The adsorption kinetics was modeled by pseudo-first order and pseudo-second order. Furthermore, desorption of congo red was preliminarily studied. The pH range from 4.5 to 7.0 was favorable for the adsorption of congo red onto amine modified silica at 25ºC. Higher adsorption capacity was obtained at 50ºC. Langmuir and Freundlich models were fitted to the adsorption equilibrium data. The best fittings were obtained with the pseudo-second order and Langmuir model for kinetics and equilibrium, respectively. Desorption studies suggest that ion exchange might be the major mode of adsorption. KOH solution was the best desorbing agent for recovering the adsorbed dye.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-01
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=S1413-41522018000601053
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-41522018000601053
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1413-41522018172982
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 Associação Brasileira de Engenharia Sanitária e Ambiental - ABES
publisher.none.fl_str_mv Associação Brasileira de Engenharia Sanitária e Ambiental - ABES
dc.source.none.fl_str_mv Engenharia Sanitaria e Ambiental v.23 n.6 2018
reponame:Engenharia Sanitaria e Ambiental
instname:Associação Brasileira de Engenharia Sanitária e Ambiental (ABES)
instacron:ABES
instname_str Associação Brasileira de Engenharia Sanitária e Ambiental (ABES)
instacron_str ABES
institution ABES
reponame_str Engenharia Sanitaria e Ambiental
collection Engenharia Sanitaria e Ambiental
repository.name.fl_str_mv Engenharia Sanitaria e Ambiental - Associação Brasileira de Engenharia Sanitária e Ambiental (ABES)
repository.mail.fl_str_mv ||esa@abes-dn.org.br
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