Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato

Detalhes bibliográficos
Autor(a) principal: Leite,Sidnei Quezada M.
Data de Publicação: 2000
Outros Autores: Colodete,Carlos Henrique A., Dieguez,Lídia Chaloub, San Gil,Rosane A. S.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000300002
Resumo: A natural clay from Campina Grande region (Paraíba, Brazil), with 8.57% of Fe2O3, was used to study the most appropriate condition to carry out the iron extraction, without altering the clay structure in a significant way. Samples were treated with the Dithionite-Citrate-Bicarbonate method (DCB) for 30 and 120 minutes (pH=9.1), and also with citric acid (pH=1.8; time=15min), at 75°C. Conductivity measurements, X-ray fluorescence, X-ray diffraction, energy-dispersive spectrometry, electron-diffraction with transmission electron microscopy and textural evaluation by nitrogen adsorption were done. The treatment in a basic medium was more selective for iron removal than in acid condition. The time of 30 minutes, with 1.6 g Na2S2O4/10 g clay, was the best condition for the iron extraction.
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spelling Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonatobrazilian claysmectiteiron extractionA natural clay from Campina Grande region (Paraíba, Brazil), with 8.57% of Fe2O3, was used to study the most appropriate condition to carry out the iron extraction, without altering the clay structure in a significant way. Samples were treated with the Dithionite-Citrate-Bicarbonate method (DCB) for 30 and 120 minutes (pH=9.1), and also with citric acid (pH=1.8; time=15min), at 75°C. Conductivity measurements, X-ray fluorescence, X-ray diffraction, energy-dispersive spectrometry, electron-diffraction with transmission electron microscopy and textural evaluation by nitrogen adsorption were done. The treatment in a basic medium was more selective for iron removal than in acid condition. The time of 30 minutes, with 1.6 g Na2S2O4/10 g clay, was the best condition for the iron extraction.Sociedade Brasileira de Química2000-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000300002Química Nova v.23 n.3 2000reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422000000300002info:eu-repo/semantics/openAccessLeite,Sidnei Quezada M.Colodete,Carlos Henrique A.Dieguez,Lídia ChaloubSan Gil,Rosane A. S.por2000-12-08T00:00:00Zoai:scielo:S0100-40422000000300002Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2000-12-08T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
title Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
spellingShingle Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
Leite,Sidnei Quezada M.
brazilian clay
smectite
iron extraction
title_short Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
title_full Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
title_fullStr Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
title_full_unstemmed Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
title_sort Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato
author Leite,Sidnei Quezada M.
author_facet Leite,Sidnei Quezada M.
Colodete,Carlos Henrique A.
Dieguez,Lídia Chaloub
San Gil,Rosane A. S.
author_role author
author2 Colodete,Carlos Henrique A.
Dieguez,Lídia Chaloub
San Gil,Rosane A. S.
author2_role author
author
author
dc.contributor.author.fl_str_mv Leite,Sidnei Quezada M.
Colodete,Carlos Henrique A.
Dieguez,Lídia Chaloub
San Gil,Rosane A. S.
dc.subject.por.fl_str_mv brazilian clay
smectite
iron extraction
topic brazilian clay
smectite
iron extraction
description A natural clay from Campina Grande region (Paraíba, Brazil), with 8.57% of Fe2O3, was used to study the most appropriate condition to carry out the iron extraction, without altering the clay structure in a significant way. Samples were treated with the Dithionite-Citrate-Bicarbonate method (DCB) for 30 and 120 minutes (pH=9.1), and also with citric acid (pH=1.8; time=15min), at 75°C. Conductivity measurements, X-ray fluorescence, X-ray diffraction, energy-dispersive spectrometry, electron-diffraction with transmission electron microscopy and textural evaluation by nitrogen adsorption were done. The treatment in a basic medium was more selective for iron removal than in acid condition. The time of 30 minutes, with 1.6 g Na2S2O4/10 g clay, was the best condition for the iron extraction.
publishDate 2000
dc.date.none.fl_str_mv 2000-06-01
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=S0100-40422000000300002
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000300002
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422000000300002
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.23 n.3 2000
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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