Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems

Detalhes bibliográficos
Autor(a) principal: Almeida Neto,Ambrósio Florêncio de
Data de Publicação: 2012
Outros Autores: Vieira,Melissa Gurgel Adeodato, Silva,Meuris Gurgel Carlos 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=S1516-14392012000100016
Resumo: Cu (II) removal equilibrium from aqueous solutions using calcined clays "Bofe" and "Verde-lodo" has been studied by batch and fixed-bed in static and dynamic systems, respectively. Analyses were performed for physicochemical characterization of clays using the techniques: X-ray fluorescence (XRF), thermogravimetry (TG), N2 adsorption (BET) and Cationic Exchange Capacity (CEC). Batch experiments were performed at a constant temperature, adjusting the pH of the solution in contact with clays. Adsorption assays in fixed bed were conducted at the flow rate determined through mass transfer zone (MTZ). Langmuir and Freundlich models were adjusted to equilibrium data. The results of characterization indicated that the temperature of 500ºC is best suited for the calcination of the clays. The maximum adsorption capacity was higher for dynamic system than fixed bed compared to static system, enhancing from 0.0748 to 0.1371 and from 0.0599 to 0.22 mmol.g-1 of clay for "Bofe" and "Verde-lodo", respectively.
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spelling Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systemsadsorptionheavy metal removalbentonitic clayCu (II) removal equilibrium from aqueous solutions using calcined clays "Bofe" and "Verde-lodo" has been studied by batch and fixed-bed in static and dynamic systems, respectively. Analyses were performed for physicochemical characterization of clays using the techniques: X-ray fluorescence (XRF), thermogravimetry (TG), N2 adsorption (BET) and Cationic Exchange Capacity (CEC). Batch experiments were performed at a constant temperature, adjusting the pH of the solution in contact with clays. Adsorption assays in fixed bed were conducted at the flow rate determined through mass transfer zone (MTZ). Langmuir and Freundlich models were adjusted to equilibrium data. The results of characterization indicated that the temperature of 500ºC is best suited for the calcination of the clays. The maximum adsorption capacity was higher for dynamic system than fixed bed compared to static system, enhancing from 0.0748 to 0.1371 and from 0.0599 to 0.22 mmol.g-1 of clay for "Bofe" and "Verde-lodo", respectively.ABM, ABC, ABPol2012-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100016Materials Research v.15 n.1 2012reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392011005000089info:eu-repo/semantics/openAccessAlmeida Neto,Ambrósio Florêncio deVieira,Melissa Gurgel AdeodatoSilva,Meuris Gurgel Carlos daeng2012-02-23T00:00:00Zoai:scielo:S1516-14392012000100016Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2012-02-23T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
title Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
spellingShingle Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
Almeida Neto,Ambrósio Florêncio de
adsorption
heavy metal removal
bentonitic clay
title_short Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
title_full Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
title_fullStr Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
title_full_unstemmed Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
title_sort Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems
author Almeida Neto,Ambrósio Florêncio de
author_facet Almeida Neto,Ambrósio Florêncio de
Vieira,Melissa Gurgel Adeodato
Silva,Meuris Gurgel Carlos da
author_role author
author2 Vieira,Melissa Gurgel Adeodato
Silva,Meuris Gurgel Carlos da
author2_role author
author
dc.contributor.author.fl_str_mv Almeida Neto,Ambrósio Florêncio de
Vieira,Melissa Gurgel Adeodato
Silva,Meuris Gurgel Carlos da
dc.subject.por.fl_str_mv adsorption
heavy metal removal
bentonitic clay
topic adsorption
heavy metal removal
bentonitic clay
description Cu (II) removal equilibrium from aqueous solutions using calcined clays "Bofe" and "Verde-lodo" has been studied by batch and fixed-bed in static and dynamic systems, respectively. Analyses were performed for physicochemical characterization of clays using the techniques: X-ray fluorescence (XRF), thermogravimetry (TG), N2 adsorption (BET) and Cationic Exchange Capacity (CEC). Batch experiments were performed at a constant temperature, adjusting the pH of the solution in contact with clays. Adsorption assays in fixed bed were conducted at the flow rate determined through mass transfer zone (MTZ). Langmuir and Freundlich models were adjusted to equilibrium data. The results of characterization indicated that the temperature of 500ºC is best suited for the calcination of the clays. The maximum adsorption capacity was higher for dynamic system than fixed bed compared to static system, enhancing from 0.0748 to 0.1371 and from 0.0599 to 0.22 mmol.g-1 of clay for "Bofe" and "Verde-lodo", respectively.
publishDate 2012
dc.date.none.fl_str_mv 2012-02-01
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=S1516-14392012000100016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100016
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392011005000089
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.15 n.1 2012
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
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