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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/58462
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dc.creatorTatiana das Chagas Almeidapt_BR
dc.creatorEric Marsalha Garciapt_BR
dc.creatorHugo Walisson Alves da Silvapt_BR
dc.creatorTulio Matenciopt_BR
dc.creatorVanessa de Freitas Cunha Linspt_BR
dc.date.accessioned2023-09-05T16:00:11Z-
dc.date.available2023-09-05T16:00:11Z-
dc.date.issued2016-
dc.citation.volume149pt_BR
dc.citation.spage25pt_BR
dc.citation.epage33pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.minpro.2016.02.001pt_BR
dc.identifier.issn0301-7516pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/58462-
dc.description.resumoElectrochemical and surface analyseswere carried out to study the leaching of chalcopyrite in acidmedia, aiming to increase copper extraction from low-grade chalcopyrite ores. Unpublished results include the use of electrochemical impedance spectroscopy (EIS) to characterize the dissolution resistance of chalcopyrite surfaces in 0.1 mol·L−¹ of hydrochloric, nitric or sulfuric acids. Potentiodynamic polarization, atomic absorption spectrometry and EIS analysis showed that hydrochloric acid solutions are more efficient leaching agents than nitric and sulfuric acids. The impedance results suggested that the chalcopyrite dissolution is a diffusion-controlled process in hydrochloric and sulfuric acids. The use of Raman spectroscopy and scanning electronmicroscopywith energy dispersive spectrometers (SEM/EDS) allowed the partial identification of lead and bismuth sulfides as impurities. Two products were identified on the surface of chalcopyrite after anodic polarization, i.e., sulfur in the sulfuric acid only and covellite in all three acids.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICApt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofInternational Journal of Mineral Processingpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectChalcopyrite leachingpt_BR
dc.subjectElectrochemical impedance spectroscopypt_BR
dc.subjectAcid dissolutionpt_BR
dc.subjectRaman spectroscopypt_BR
dc.subject.otherEletroquímicapt_BR
dc.subject.otherLixiviaçãopt_BR
dc.subject.otherCalcopiritapt_BR
dc.subject.otherEspectroscopia de impedânciapt_BR
dc.subject.otherRaman, Espectroscopia de.pt_BR
dc.subject.otherÁcido sulfúricopt_BR
dc.subject.otherÁcido nítricopt_BR
dc.subject.otherÁcido clorídricopt_BR
dc.titleElectrochemical study of chalcopyrite dissolution in sulfuric, nitric and hydrochloric acid solutionspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0301751616300254pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-3731-7568pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5660-8125pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6357-9553pt_BR
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