Reductive leaching of cobalt from zinc plant purification residues

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dc.authoridBirinci, Mustafa/0000-0002-1954-7837
dc.authoridDHAWAN, NIKHIL/0000-0002-0404-4575
dc.authorwosidBirinci, Mustafa/ABG-8462-2020
dc.contributor.authorSafarzadeh, Mohammad Sadegh
dc.contributor.authorDhawan, Nikhil
dc.contributor.authorBirinci, Mustafa
dc.contributor.authorMoradkhani, Davood
dc.date.accessioned2024-08-04T20:32:42Z
dc.date.available2024-08-04T20:32:42Z
dc.date.issued2011
dc.departmentİnönü Üniversitesien_US
dc.description.abstractThe leaching kinetics of the cobalt present in zinc plant purification residues (cobalt filtercakes) was investigated in the presence of the aromatic reducing agent - phenol - without any pretreatments. As such, the effects of particle size (- 75 + 53 to -180 + 150 mu m), reaction temperature (25 to 85 degrees C), phenol dosage (2 to 15%) and sulfuric acid concentration (0.5 to 2.0 M) on the dissolution rate of cobalt and manganese were investigated. The experimental data conformed well to the shrinking core model, and the dissolution rate of cobalt was found to be controlled by diffusion through the product layer. Due to the low percentage of cobalt (< 1%) in the filtercake, SEM and XRD studies did not show any cobalt-containing phases. It was demonstrated that sulfuric acid with phenol addition can effectively dissolve cobalt and manganese present in the filtercake. The activation energy of the reaction was calculated as 22.92 kJ/mol. The order of the reaction with respect to H(2)SO(4) concentration, particle size, and phenol dosage was found to be 0.61, - 1.88 and 0.70, respectively. The optimum conditions for the leaching of cobalt and manganese were found to be as 2.0 M H(2)SO(4), 85 degrees C, -75 + 53 mu m, and 10% phenol at the stirring speed of 600 rpm, which correspond to more than 97% cobalt and similar to 100% manganese recoveries. The rate of cobalt leaching based on shrinking core model can be expressed by a semiempirical equation as: 1-2/3X-(1-X)(2/3) = k(0).[H(2)SO(4)](0.61).r(0)(-188).[phenol%](0.70).exp(-22.92/RT).t (C) 2010 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.hydromet.2010.11.017
dc.identifier.endpage57en_US
dc.identifier.issn0304-386X
dc.identifier.issue1-2en_US
dc.identifier.scopus2-s2.0-79551564039en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage51en_US
dc.identifier.urihttps://doi.org/10.1016/j.hydromet.2010.11.017
dc.identifier.urihttps://hdl.handle.net/11616/95247
dc.identifier.volume106en_US
dc.identifier.wosWOS:000287952600009en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofHydrometallurgyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectReductive leachingen_US
dc.subjectZincen_US
dc.subjectCobalt filtercakeen_US
dc.subjectManganeseen_US
dc.subjectKineticsen_US
dc.subjectPhenolen_US
dc.titleReductive leaching of cobalt from zinc plant purification residuesen_US
dc.typeArticleen_US

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