Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)

Detalhes bibliográficos
Autor(a) principal: Francisco Júnior, Wilmo E. [UNESP]
Data de Publicação: 2007
Outros Autores: Bevilaqua, Denise [UNESP], Garcia Júnior, Oswaldo[UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S0100-40422007000500008
http://hdl.handle.net/11449/69842
Resumo: This work aims to study the oxidation of a complex molybdenite mineral which contains pyrite and pyrrotite, by Acidithiobacillus ferrooxidans. This study was performed by respirometric essays and bioleaching in shake flasks. Respirometric essays yielded the kinetics of mineral oxidation. The findings showed that sulfide oxidation followed classical Michaelis-Menten kinetics. Bioleaching in shake flasks allowed evaluation of chemical and mineralogical changes resulting from sulfide oxidation. The results demonstrated that pyrrotite and pyrite were completely oxidized in A. ferrooxidans cultures whereas molybdenite was not consumed. These data indicated that molybdenite was the most recalcitrant sulfide in the sample.
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spelling Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)Microbiological oxidative dissolution of a complex mineral sample containing pyrite (FeS2), pyrrotite (Fe1-XS) and molybdenite (MoS2)A. ferrooxidansBioleachingMineral sulfidesThis work aims to study the oxidation of a complex molybdenite mineral which contains pyrite and pyrrotite, by Acidithiobacillus ferrooxidans. This study was performed by respirometric essays and bioleaching in shake flasks. Respirometric essays yielded the kinetics of mineral oxidation. The findings showed that sulfide oxidation followed classical Michaelis-Menten kinetics. Bioleaching in shake flasks allowed evaluation of chemical and mineralogical changes resulting from sulfide oxidation. The results demonstrated that pyrrotite and pyrite were completely oxidized in A. ferrooxidans cultures whereas molybdenite was not consumed. These data indicated that molybdenite was the most recalcitrant sulfide in the sample.Departamento de Bioquímica e Tecnologia Química Instituto de Química Universidade Estadual Paulista, CP 355, 14801-970 Araraquara - SPDepartamento de Bioquímica e Tecnologia Química Instituto de Química Universidade Estadual Paulista, CP 355, 14801-970 Araraquara - SPUniversidade Estadual Paulista (Unesp)Francisco Júnior, Wilmo E. [UNESP]Bevilaqua, Denise [UNESP]Garcia Júnior, Oswaldo[UNESP]2014-05-27T11:22:34Z2014-05-27T11:22:34Z2007-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1095-1099application/pdfhttp://dx.doi.org/10.1590/S0100-40422007000500008Quimica Nova, v. 30, n. 5, p. 1095-1099, 2007.0100-40421678-7064http://hdl.handle.net/11449/6984210.1590/S0100-40422007000500008S0100-40422007000500008WOS:0002495010000082-s2.0-361489804452-s2.0-36148980445.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporQuímica Nova0.6460,255info:eu-repo/semantics/openAccess2023-12-24T06:17:42Zoai:repositorio.unesp.br:11449/69842Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:10:33.171706Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
Microbiological oxidative dissolution of a complex mineral sample containing pyrite (FeS2), pyrrotite (Fe1-XS) and molybdenite (MoS2)
title Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
spellingShingle Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
Francisco Júnior, Wilmo E. [UNESP]
A. ferrooxidans
Bioleaching
Mineral sulfides
title_short Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
title_full Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
title_fullStr Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
title_full_unstemmed Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
title_sort Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), pirrotita (Fe 1-XS) e molibdenita (MoS2)
author Francisco Júnior, Wilmo E. [UNESP]
author_facet Francisco Júnior, Wilmo E. [UNESP]
Bevilaqua, Denise [UNESP]
Garcia Júnior, Oswaldo[UNESP]
author_role author
author2 Bevilaqua, Denise [UNESP]
Garcia Júnior, Oswaldo[UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Francisco Júnior, Wilmo E. [UNESP]
Bevilaqua, Denise [UNESP]
Garcia Júnior, Oswaldo[UNESP]
dc.subject.por.fl_str_mv A. ferrooxidans
Bioleaching
Mineral sulfides
topic A. ferrooxidans
Bioleaching
Mineral sulfides
description This work aims to study the oxidation of a complex molybdenite mineral which contains pyrite and pyrrotite, by Acidithiobacillus ferrooxidans. This study was performed by respirometric essays and bioleaching in shake flasks. Respirometric essays yielded the kinetics of mineral oxidation. The findings showed that sulfide oxidation followed classical Michaelis-Menten kinetics. Bioleaching in shake flasks allowed evaluation of chemical and mineralogical changes resulting from sulfide oxidation. The results demonstrated that pyrrotite and pyrite were completely oxidized in A. ferrooxidans cultures whereas molybdenite was not consumed. These data indicated that molybdenite was the most recalcitrant sulfide in the sample.
publishDate 2007
dc.date.none.fl_str_mv 2007-09-01
2014-05-27T11:22:34Z
2014-05-27T11:22:34Z
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 http://dx.doi.org/10.1590/S0100-40422007000500008
Quimica Nova, v. 30, n. 5, p. 1095-1099, 2007.
0100-4042
1678-7064
http://hdl.handle.net/11449/69842
10.1590/S0100-40422007000500008
S0100-40422007000500008
WOS:000249501000008
2-s2.0-36148980445
2-s2.0-36148980445.pdf
url http://dx.doi.org/10.1590/S0100-40422007000500008
http://hdl.handle.net/11449/69842
identifier_str_mv Quimica Nova, v. 30, n. 5, p. 1095-1099, 2007.
0100-4042
1678-7064
10.1590/S0100-40422007000500008
S0100-40422007000500008
WOS:000249501000008
2-s2.0-36148980445
2-s2.0-36148980445.pdf
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Química Nova
0.646
0,255
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1095-1099
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129293479313408

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