Factorial design applied to sodium activation of a Brazilian bentonite
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , |
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. |
id |
USP-29_fa4004d3c9fc8ff5e4d8ec047502fd40 |
---|---|
oai_identifier_str |
oai:scielo:S0366-69132019000200185 |
network_acronym_str |
USP-29 |
network_name_str |
Cerâmica (São Paulo. Online) |
repository_id_str |
|
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 |
_version_ |
1748936784274784256 |