Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method

Detalhes bibliográficos
Autor(a) principal: Bieseki,Lindiane
Data de Publicação: 2013
Outros Autores: Bertell,Francine, Treichel,Helen, Penha,Fabio G., Pergher,Sibele B. C.
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=S1516-14392013000500023
Resumo: Montmorillonite clays are of great interest for industrial processes such as catalysis and adsorption. The textural properties of clays can be modified in an attempt to increase their uses. This paper describes the acid treatment of natural montmorillonite clay. The materials were characterized using X-ray diffraction (XRD), atomic absorption spectroscopy (AA) and BET surface area measurements. Three different acids (HCl, HNO3 and H2SO4) were tested, and HCl and H2SO4 were more efficient for removing Fe from the clay. The results indicate that HCl better preserves the material structure because less Al is removed. A central composite design (CCD) 2² was applied to evaluate the treatment using HCl. The temperature and concentration presented positive effects on the removal of Fe, Al and Mg. Combinations of the HCl acid solution concentration and temperature, such as 4 mol.L-1/50 °C and 1 mol.L-1/75 °C, assured that Fe was removed with less damage to the structure.
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spelling Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design methodacid treatmentclaymontmorilloniteFe removalcentral composite designMontmorillonite clays are of great interest for industrial processes such as catalysis and adsorption. The textural properties of clays can be modified in an attempt to increase their uses. This paper describes the acid treatment of natural montmorillonite clay. The materials were characterized using X-ray diffraction (XRD), atomic absorption spectroscopy (AA) and BET surface area measurements. Three different acids (HCl, HNO3 and H2SO4) were tested, and HCl and H2SO4 were more efficient for removing Fe from the clay. The results indicate that HCl better preserves the material structure because less Al is removed. A central composite design (CCD) 2² was applied to evaluate the treatment using HCl. The temperature and concentration presented positive effects on the removal of Fe, Al and Mg. Combinations of the HCl acid solution concentration and temperature, such as 4 mol.L-1/50 °C and 1 mol.L-1/75 °C, assured that Fe was removed with less damage to the structure.ABM, ABC, ABPol2013-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000500023Materials Research v.16 n.5 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000114info:eu-repo/semantics/openAccessBieseki,LindianeBertell,FrancineTreichel,HelenPenha,Fabio G.Pergher,Sibele B. C.eng2013-10-18T00:00:00Zoai:scielo:S1516-14392013000500023Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-10-18T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
title Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
spellingShingle Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
Bieseki,Lindiane
acid treatment
clay
montmorillonite
Fe removal
central composite design
title_short Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
title_full Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
title_fullStr Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
title_full_unstemmed Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
title_sort Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method
author Bieseki,Lindiane
author_facet Bieseki,Lindiane
Bertell,Francine
Treichel,Helen
Penha,Fabio G.
Pergher,Sibele B. C.
author_role author
author2 Bertell,Francine
Treichel,Helen
Penha,Fabio G.
Pergher,Sibele B. C.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Bieseki,Lindiane
Bertell,Francine
Treichel,Helen
Penha,Fabio G.
Pergher,Sibele B. C.
dc.subject.por.fl_str_mv acid treatment
clay
montmorillonite
Fe removal
central composite design
topic acid treatment
clay
montmorillonite
Fe removal
central composite design
description Montmorillonite clays are of great interest for industrial processes such as catalysis and adsorption. The textural properties of clays can be modified in an attempt to increase their uses. This paper describes the acid treatment of natural montmorillonite clay. The materials were characterized using X-ray diffraction (XRD), atomic absorption spectroscopy (AA) and BET surface area measurements. Three different acids (HCl, HNO3 and H2SO4) were tested, and HCl and H2SO4 were more efficient for removing Fe from the clay. The results indicate that HCl better preserves the material structure because less Al is removed. A central composite design (CCD) 2² was applied to evaluate the treatment using HCl. The temperature and concentration presented positive effects on the removal of Fe, Al and Mg. Combinations of the HCl acid solution concentration and temperature, such as 4 mol.L-1/50 °C and 1 mol.L-1/75 °C, assured that Fe was removed with less damage to the structure.
publishDate 2013
dc.date.none.fl_str_mv 2013-10-01
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=S1516-14392013000500023
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000500023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000114
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.16 n.5 2013
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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