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

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dc.contributor.authorSantos, Luciano Rodrigo Gomes
dc.contributor.authorBarbosa, Alexandre Ferraz
dc.contributor.authorSouza, Adelson Dias de
dc.contributor.authorLeão, Versiane Albis
dc.date.accessioned2015-05-26T18:33:45Z
dc.date.available2015-05-26T18:33:45Z
dc.date.issued2006
dc.description.abstractThis 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.pt_BR
dc.identifier.citationSANTOS, 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.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.mineng.2006.03.001
dc.identifier.issn0892-6875
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/5532
dc.language.isoen_USpt_BR
dc.rights.licenseO periódico Minerals Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3614250179001.pt_BR
dc.subjectParticle morphologypt_BR
dc.subjectBioleachingpt_BR
dc.subjectSulphide orept_BR
dc.titleBioleaching of a complex nickel–iron concentrate by mesophile bacteria.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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