Factorial design applied to sodium activation of a Brazilian bentonite

Detalhes bibliográficos
Autor(a) principal: Rosário,J. A. do
Data de Publicação: 2019
Outros Autores: Miguel,R. F., Rosário,D. A. do, Kuhnen,N. C., Riella,H. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132019000200185
Resumo: Abstract Sodium bentonites are extensively used in industry because they have specific properties that are wanted for several purposes, such as high swelling, thixotropy, and cation exchange capacity. Otherwise, calcium and polycationic bentonites, which are predominant in Brazil, need to be chemically treated by sodium activation to expand their content of interlayer exchangeable sodium cations, which increases these properties. The present study shows the factorial design of the sodium activation for a polycationic bentonite from Quatro Barras, Paraná. The factors considered in the study were: reagent (NaOH and Na2CO3), concentration (1% and 5%) and contact time (24 and 72 h). The response variables were swelling and cation exchange capacity. Statistical analysis indicated significant effects of all factors over swelling and response surface methodology indicated optimal activation with sodium carbonate at 5% for 24 h.
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spelling Factorial design applied to sodium activation of a Brazilian bentonitesodium activationswellingcation exchange capacityfactorial designAbstract Sodium bentonites are extensively used in industry because they have specific properties that are wanted for several purposes, such as high swelling, thixotropy, and cation exchange capacity. Otherwise, calcium and polycationic bentonites, which are predominant in Brazil, need to be chemically treated by sodium activation to expand their content of interlayer exchangeable sodium cations, which increases these properties. The present study shows the factorial design of the sodium activation for a polycationic bentonite from Quatro Barras, Paraná. The factors considered in the study were: reagent (NaOH and Na2CO3), concentration (1% and 5%) and contact time (24 and 72 h). The response variables were swelling and cation exchange capacity. Statistical analysis indicated significant effects of all factors over swelling and response surface methodology indicated optimal activation with sodium carbonate at 5% for 24 h.Associação Brasileira de Cerâmica2019-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132019000200185Cerâmica v.65 n.374 2019reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132019653742543info:eu-repo/semantics/openAccessRosário,J. A. doMiguel,R. F.Rosário,D. A. doKuhnen,N. C.Riella,H. G.eng2019-06-04T00:00:00Zoai:scielo:S0366-69132019000200185Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2019-06-04T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Factorial design applied to sodium activation of a Brazilian bentonite
title Factorial design applied to sodium activation of a Brazilian bentonite
spellingShingle Factorial design applied to sodium activation of a Brazilian bentonite
Rosário,J. A. do
sodium activation
swelling
cation exchange capacity
factorial design
title_short Factorial design applied to sodium activation of a Brazilian bentonite
title_full Factorial design applied to sodium activation of a Brazilian bentonite
title_fullStr Factorial design applied to sodium activation of a Brazilian bentonite
title_full_unstemmed Factorial design applied to sodium activation of a Brazilian bentonite
title_sort Factorial design applied to sodium activation of a Brazilian bentonite
author Rosário,J. A. do
author_facet Rosário,J. A. do
Miguel,R. F.
Rosário,D. A. do
Kuhnen,N. C.
Riella,H. G.
author_role author
author2 Miguel,R. F.
Rosário,D. A. do
Kuhnen,N. C.
Riella,H. G.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rosário,J. A. do
Miguel,R. F.
Rosário,D. A. do
Kuhnen,N. C.
Riella,H. G.
dc.subject.por.fl_str_mv sodium activation
swelling
cation exchange capacity
factorial design
topic sodium activation
swelling
cation exchange capacity
factorial design
description Abstract Sodium bentonites are extensively used in industry because they have specific properties that are wanted for several purposes, such as high swelling, thixotropy, and cation exchange capacity. Otherwise, calcium and polycationic bentonites, which are predominant in Brazil, need to be chemically treated by sodium activation to expand their content of interlayer exchangeable sodium cations, which increases these properties. The present study shows the factorial design of the sodium activation for a polycationic bentonite from Quatro Barras, Paraná. The factors considered in the study were: reagent (NaOH and Na2CO3), concentration (1% and 5%) and contact time (24 and 72 h). The response variables were swelling and cation exchange capacity. Statistical analysis indicated significant effects of all factors over swelling and response surface methodology indicated optimal activation with sodium carbonate at 5% for 24 h.
publishDate 2019
dc.date.none.fl_str_mv 2019-06-01
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=S0366-69132019000200185
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132019000200185
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0366-69132019653742543
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 Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.65 n.374 2019
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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