Characterization of verdete rock as a potential source of potassium

Detalhes bibliográficos
Autor(a) principal: Santos, Wedisson Oliveira
Data de Publicação: 2015
Outros Autores: Mattiello, Edson Marcio, Costa, Liovando Marciano da, Abrahão, Walter Antônio Pereira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://dx.doi.org/10.1590/0034-737X201562040009
http://www.locus.ufv.br/handle/123456789/13291
Resumo: Potassium is a nutrient found at low levels in Brazilian soils, requiring large inputs of fertilizers to achieve satisfactory crop yields. Brazil has high external dependence and limited reserves of soluble K mineral, which is traditionally exploited for the production of fertilizers. On the other hand, it is common the occurrence in the country of potassium-rich silicate minerals which are not commercially exploited. This study aimed to characterize mineralogically and chemically samples of verdete rock separated into size fractions and evaluate its potential as potassium fertilizer. The mineral composition of verdete rock is based on glauconite, quartz and feldspar. The total K2O content in verdete rock ranged from 5.18 to 9.0 dag/kg. The K content extracted in water or 2% citric acid was 2.4% below the total of K, indicating low reactivity of verdete rock and limitations for direct use as K source. The processes of physical fractionation and sedimentation in water are inefficient to promote the concentration of K in the different verdete rock fractions. The total K content in some samples are considerable and may enable the use of this rock as raw material for production of more reactive potassium fertilizers.
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spelling Characterization of verdete rock as a potential source of potassiumGlauconiteKFertilizerPotassium is a nutrient found at low levels in Brazilian soils, requiring large inputs of fertilizers to achieve satisfactory crop yields. Brazil has high external dependence and limited reserves of soluble K mineral, which is traditionally exploited for the production of fertilizers. On the other hand, it is common the occurrence in the country of potassium-rich silicate minerals which are not commercially exploited. This study aimed to characterize mineralogically and chemically samples of verdete rock separated into size fractions and evaluate its potential as potassium fertilizer. The mineral composition of verdete rock is based on glauconite, quartz and feldspar. The total K2O content in verdete rock ranged from 5.18 to 9.0 dag/kg. The K content extracted in water or 2% citric acid was 2.4% below the total of K, indicating low reactivity of verdete rock and limitations for direct use as K source. The processes of physical fractionation and sedimentation in water are inefficient to promote the concentration of K in the different verdete rock fractions. The total K content in some samples are considerable and may enable the use of this rock as raw material for production of more reactive potassium fertilizers.O K é um nutriente encontrado em baixos teores em solos brasileiros, sendo necessário grande aporte via fertilização para alcançar produtividades satisfatórias das culturas. O Brasil apresenta elevada dependência externa e possui limitadas reservas de minerais solúveis de K, tradicionalmente explorados para a produção de fertilizantes. Por outro lado, é comum a ocorrência no país de minerais silicatados ricos em K não explorados comercialmente. Neste trabalho, objetivou-se caracterizar mineralógica e quimicamente amostras de verdete, separadas em frações granulométricas e avaliar seu potencial de uso com fertilizante potássico.A composição mineral do verdete é à base de glauconita, quartzo e feldspatos. Os teores totais de K2O no verdete variaram de 5,18 a 9,0 dag/kg. O teor de K extraído em água ou em ácido cítrico a 2% foi inferior a 2,4% do K total, indicando baixa reatividade do verdete e limitações para seu uso direto como fonte de K. O fracionamento físico e a sedimentação em água são processos ineficientes para promover a concentração de K nas diferentes frações do verdete. Os teores totais de K em algumas amostras de verdete são consideráveis, podendo viabilizar o uso desta rocha como matéria prima para produção de fertilizantes potássicos mais reativos.Revista Ceres2017-11-20T10:43:19Z2017-11-20T10:43:19Z2015-07-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf2177-3491http://dx.doi.org/10.1590/0034-737X201562040009http://www.locus.ufv.br/handle/123456789/13291engv. 62, n.4, p. 392-400, julho/agosto 2015Santos, Wedisson OliveiraMattiello, Edson MarcioCosta, Liovando Marciano daAbrahão, Walter Antônio Pereirainfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T08:18:31Zoai:locus.ufv.br:123456789/13291Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T08:18:31LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Characterization of verdete rock as a potential source of potassium
title Characterization of verdete rock as a potential source of potassium
spellingShingle Characterization of verdete rock as a potential source of potassium
Santos, Wedisson Oliveira
Glauconite
K
Fertilizer
title_short Characterization of verdete rock as a potential source of potassium
title_full Characterization of verdete rock as a potential source of potassium
title_fullStr Characterization of verdete rock as a potential source of potassium
title_full_unstemmed Characterization of verdete rock as a potential source of potassium
title_sort Characterization of verdete rock as a potential source of potassium
author Santos, Wedisson Oliveira
author_facet Santos, Wedisson Oliveira
Mattiello, Edson Marcio
Costa, Liovando Marciano da
Abrahão, Walter Antônio Pereira
author_role author
author2 Mattiello, Edson Marcio
Costa, Liovando Marciano da
Abrahão, Walter Antônio Pereira
author2_role author
author
author
dc.contributor.author.fl_str_mv Santos, Wedisson Oliveira
Mattiello, Edson Marcio
Costa, Liovando Marciano da
Abrahão, Walter Antônio Pereira
dc.subject.por.fl_str_mv Glauconite
K
Fertilizer
topic Glauconite
K
Fertilizer
description Potassium is a nutrient found at low levels in Brazilian soils, requiring large inputs of fertilizers to achieve satisfactory crop yields. Brazil has high external dependence and limited reserves of soluble K mineral, which is traditionally exploited for the production of fertilizers. On the other hand, it is common the occurrence in the country of potassium-rich silicate minerals which are not commercially exploited. This study aimed to characterize mineralogically and chemically samples of verdete rock separated into size fractions and evaluate its potential as potassium fertilizer. The mineral composition of verdete rock is based on glauconite, quartz and feldspar. The total K2O content in verdete rock ranged from 5.18 to 9.0 dag/kg. The K content extracted in water or 2% citric acid was 2.4% below the total of K, indicating low reactivity of verdete rock and limitations for direct use as K source. The processes of physical fractionation and sedimentation in water are inefficient to promote the concentration of K in the different verdete rock fractions. The total K content in some samples are considerable and may enable the use of this rock as raw material for production of more reactive potassium fertilizers.
publishDate 2015
dc.date.none.fl_str_mv 2015-07-04
2017-11-20T10:43:19Z
2017-11-20T10:43:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 2177-3491
http://dx.doi.org/10.1590/0034-737X201562040009
http://www.locus.ufv.br/handle/123456789/13291
identifier_str_mv 2177-3491
url http://dx.doi.org/10.1590/0034-737X201562040009
http://www.locus.ufv.br/handle/123456789/13291
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv v. 62, n.4, p. 392-400, julho/agosto 2015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv pdf
application/pdf
dc.publisher.none.fl_str_mv Revista Ceres
publisher.none.fl_str_mv Revista Ceres
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv fabiojreis@ufv.br
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