The electrochemical behavior of pyrite-pyrrhotite mixtures

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dc.contributor.authorAlmeida, CMVB
dc.contributor.authorGiannetti, B. F.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:40Z
dc.date.available2014-05-20T15:20:40Z
dc.date.issued2003-08-30
dc.description.abstractTo assess the response of common sulfide minerals to oxidizing conditions, a methodology to immobilize mechanically solid particles on carbon surfaces (voltammetry of microparticles, VMP) was employed, to define the influence of the pyrrhotite content in pyrite-pyrrhotite mixtures. The influence of the galvanic interactions and local pH on the oxidation reaction of pyrite was also investigated. With this purpose, artificial two-mineral electrodes were constructed, ranging in weight from 20 to 80% pyrrhotite. The resulting cyclic voltammograms were analyzed and relative quantities of oxidation products were evaluated. The goal of this work was to define the boundary conditions, in terms of pyrrhotite content in the mixture, that determine the SO42-/S ratio obtained and to describe some parameters which influence this ratio: local pH and galvanic interactions. (C) 2003 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Inst Ciências Exatas & Tecnol, LaFTA, Lab Fisicoquim Teorica & Aplicada, BR-04026002 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Ciências Exatas & Tecnol, LaFTA, Lab Fisicoquim Teorica & Aplicada, BR-04026002 São Paulo, Brazil
dc.format.extent27-34
dc.identifierhttp://dx.doi.org/10.1016/S0022-0728(03)00254-7
dc.identifier.citationJournal of Electroanalytical Chemistry. Lausanne: Elsevier B.V. Sa, v. 553, p. 27-34, 2003.
dc.identifier.doi10.1016/S0022-0728(03)00254-7
dc.identifier.issn0022-0728
dc.identifier.urihttp://hdl.handle.net/11449/31927
dc.identifier.wosWOS:000185368700003
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Electroanalytical Chemistry
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectvoltammetry of microparticlespt
dc.subjectpyritept
dc.subjectpyrrhotitept
dc.titleThe electrochemical behavior of pyrite-pyrrhotite mixturesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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