Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.

This work investigates the bioleaching of a complex nickel–iron concentrate (pentlandite, pyrrhotite, and minor amounts of chalcopyrite) using acidophile iron-oxidizing bacteria. It aims to improve the understanding of the mechanism of bacterial action on nickel sulphide bioleaching. The effects of...

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Detalles Bibliográficos
Autores: Santos, Luciano Rodrigo Gomes, Barbosa, Alexandre Ferraz, Souza, Adelson Dias de, Leão, Versiane Albis
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:Brasil
Institución:Universidade Federal de Ouro Preto (UFOP)
Repositorio:Repositório Institucional da UFOP
Idioma:inglés
OAI Identifier:oai:repositorio.ufop.br:123456789/5532
Acceso en línea:http://www.repositorio.ufop.br/handle/123456789/5532
https://doi.org/10.1016/j.mineng.2006.03.001
Access Level:acceso abierto
Palabra clave:Particle morphology
Bioleaching
Sulphide ore
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spelling Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.Particle morphologyBioleachingSulphide oreThis work investigates the bioleaching of a complex nickel–iron concentrate (pentlandite, pyrrhotite, and minor amounts of chalcopyrite) using acidophile iron-oxidizing bacteria. It aims to improve the understanding of the mechanism of bacterial action on nickel sulphide bioleaching. The effects of the external addition of Fe(II) and the mineralogical assembly on the extraction of nickel are evaluated. A high nickel extraction (around 70%) can be achieved in batch experiments. Moreover, the external addition of iron has not shown any effect on the extraction of the metal, emphasizing the importance of pyrrhotite dissolution in the first step of bioleaching. It was also examined the morphological features of the sulphides as well as the leach residues and reactions products formed during bioleaching. It was noticed that elemental sulphur was produced on pyrrhotite surfaces, which dissolves ahead of pentlandite. A discussion on how galvanic interactions affect the reactivity of sulphide mineral and the formation of bioleaching products is also presented.2015-05-26T18:33:45Z2015-05-26T18:33:45Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSANTOS, L. R. G. et al. Bioleaching of a complex nickel–iron concentrate by mesophile bacteria. Minerals Engineering, v. 19, n.12, p. 1251-1258, 2006. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0892687506000872>. Acesso em: 09 abr. 2015.0892-6875http://www.repositorio.ufop.br/handle/123456789/5532https://doi.org/10.1016/j.mineng.2006.03.001ark:/61566/001300000bgbxO periódico Minerals Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3614250179001.info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPSantos, Luciano Rodrigo GomesBarbosa, Alexandre FerrazSouza, Adelson Dias deLeão, Versiane Albis2024-11-10T22:23:27Zoai:repositorio.ufop.br:123456789/5532Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332024-11-10T22:23:27Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.none.fl_str_mv Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
title Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
spellingShingle Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
Santos, Luciano Rodrigo Gomes
Particle morphology
Bioleaching
Sulphide ore
title_short Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
title_full Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
title_fullStr Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
title_full_unstemmed Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
title_sort Bioleaching of a complex nickel–iron concentrate by mesophile bacteria.
dc.creator.none.fl_str_mv Santos, Luciano Rodrigo Gomes
Barbosa, Alexandre Ferraz
Souza, Adelson Dias de
Leão, Versiane Albis
author Santos, Luciano Rodrigo Gomes
author_facet Santos, Luciano Rodrigo Gomes
Barbosa, Alexandre Ferraz
Souza, Adelson Dias de
Leão, Versiane Albis
author_role author
author2 Barbosa, Alexandre Ferraz
Souza, Adelson Dias de
Leão, Versiane Albis
author2_role author
author
author
dc.subject.por.fl_str_mv Particle morphology
Bioleaching
Sulphide ore
topic Particle morphology
Bioleaching
Sulphide ore
description This work investigates the bioleaching of a complex nickel–iron concentrate (pentlandite, pyrrhotite, and minor amounts of chalcopyrite) using acidophile iron-oxidizing bacteria. It aims to improve the understanding of the mechanism of bacterial action on nickel sulphide bioleaching. The effects of the external addition of Fe(II) and the mineralogical assembly on the extraction of nickel are evaluated. A high nickel extraction (around 70%) can be achieved in batch experiments. Moreover, the external addition of iron has not shown any effect on the extraction of the metal, emphasizing the importance of pyrrhotite dissolution in the first step of bioleaching. It was also examined the morphological features of the sulphides as well as the leach residues and reactions products formed during bioleaching. It was noticed that elemental sulphur was produced on pyrrhotite surfaces, which dissolves ahead of pentlandite. A discussion on how galvanic interactions affect the reactivity of sulphide mineral and the formation of bioleaching products is also presented.
publishDate 2006
dc.date.none.fl_str_mv 2006
2015-05-26T18:33:45Z
2015-05-26T18:33:45Z
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 SANTOS, L. R. G. et al. Bioleaching of a complex nickel–iron concentrate by mesophile bacteria. Minerals Engineering, v. 19, n.12, p. 1251-1258, 2006. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0892687506000872>. Acesso em: 09 abr. 2015.
0892-6875
http://www.repositorio.ufop.br/handle/123456789/5532
https://doi.org/10.1016/j.mineng.2006.03.001
dc.identifier.dark.fl_str_mv ark:/61566/001300000bgbx
identifier_str_mv SANTOS, L. R. G. et al. Bioleaching of a complex nickel–iron concentrate by mesophile bacteria. Minerals Engineering, v. 19, n.12, p. 1251-1258, 2006. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0892687506000872>. Acesso em: 09 abr. 2015.
0892-6875
ark:/61566/001300000bgbx
url http://www.repositorio.ufop.br/handle/123456789/5532
https://doi.org/10.1016/j.mineng.2006.03.001
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFOP
instname:Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
instname_str Universidade Federal de Ouro Preto (UFOP)
instacron_str UFOP
institution UFOP
reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
repository.name.fl_str_mv Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)
repository.mail.fl_str_mv repositorio@ufop.edu.br
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score 15,300719

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