Electrochemical noise analysis of chalcopyrite carbon paste electrodes by Acidithiobacillus ferrooxidans

dc.contributor.authorHorta, Daniela G. [UNESP]
dc.contributor.authorBevilaqua, Denise [UNESP]
dc.contributor.authorAcciaric, Heloisa A. [UNESP]
dc.contributor.authorGarcia Jr., Oswaldo [UNESP]
dc.contributor.authorBenedettie, Assis V. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:30Z
dc.date.available2014-05-20T15:20:30Z
dc.date.issued2007-01-01
dc.description.abstractThe electrochemical response of chalcopyrite was studied using electrochemical noise analysis (ENA). The assay was carried out under constant aeration using 30 mL in two electrochemical cells containing iron-free mineral salts solution. These cells were initially monitored for 56 hours, After 72 hours, 7.25x 10(10) cells mL(-1) of A, ferrooxidans strain LR were added in both cells and monitored until 128 h. Subsequent to this period, 0.927 mmol L-1 of silver ions and 400 mmol L-1 of chloride ions were added each one separately. Both conditions were monitored until 168 hours. According to results obtained, it was observed that Cl- ions addition induced an accelerated corrosion process. However, there is a tendency of the system to reach the stationary state due to repassivation of the electrodic surface. In the other side, the Ag+ addition contributed for the maintenance of the oxidant atmosphere, in spite of controversial effect caused by considerable variations in the R-n values, resulting in a instability in the chalcopyrite reactivity.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent83-86
dc.identifierhttp://dx.doi.org/10.4028/www.scientific.net/AMR.20-21.83
dc.identifier.citationBiohydrometallury: From the Single Cell To the Environment. Stafa-zurich: Trans Tech Publications Ltd, v. 20-21, p. 83-86, 2007.
dc.identifier.doi10.4028/www.scientific.net/AMR.20-21.83
dc.identifier.issn1022-6680
dc.identifier.scopus2-s2.0-72449173248
dc.identifier.urihttp://hdl.handle.net/11449/31779
dc.identifier.wosWOS:000250578900018
dc.language.isoeng
dc.publisherTrans Tech Publications Ltd
dc.relation.ispartofBiohydrometallury: From the Single Cell To the Environment
dc.relation.ispartofsjr0,121
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectchalcopyritept
dc.subjectAcidithiobacillus ferrooxidanspt
dc.subjectcarbon paste electrodespt
dc.subjectelectrochemical noise analysispt
dc.subjectbioleachingpt
dc.titleElectrochemical noise analysis of chalcopyrite carbon paste electrodes by Acidithiobacillus ferrooxidansen
dc.typeTrabalho apresentado em evento
dcterms.licensehttp://www.ttp.net/Downloads.html
dcterms.rightsHolderTrans Tech Publications Ltd

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