Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems

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dc.contributor.authorAhmadi, Ali
dc.contributor.authorRanjbar, Mohammad
dc.contributor.authorSchaffie, Mahin
dc.contributor.authorPetersen, Jochen
dc.date.accessioned2016-08-25T14:07:06Z
dc.date.available2016-08-25T14:07:06Z
dc.date.issued2012
dc.date.updated2016-08-25T14:04:53Z
dc.description.abstractIn this paper a model of conventional and electrochemical bioleaching of high grade complex copper sulfide ores or flotation concentrates in isothermal stirred tank reactors is presented and compared to experimental data. Experiments were conducted in an electrobioreactor using a mixed culture of moderate thermophile microorganisms at pulp density 20% (w/v), leaching time 10 days, stirring rate 600 rpm and temperature 50 °C. The behavior of conventional and electrochemical bioleaching processes was described with a combined reaction-based kinetic model. The model considers the effects of mineralogical composition of the feed, the properties of the initial solution, the presence of iron- and sulfur oxidizing microorganisms and both the passivation and electroreduction of chalcopyrite on the values of copper recovery, pH and redox potential during the processes. Comparing the values obtained from the integrated semi-empirical model with the experimental data showed that the model results are in good agreement with the real leaching data of copper recovery, ORP (oxidation reduction potential) and pH for the mentioned processes under different experimental conditions.en_ZA
dc.identifierhttp://dx.doi.org/10.1016/j.hydromet.2012.06.010
dc.identifier.apacitationAhmadi, A., Ranjbar, M., Schaffie, M., & Petersen, J. (2012). Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems. <i>Hydrometallurgy</i>, http://hdl.handle.net/11427/21555en_ZA
dc.identifier.chicagocitationAhmadi, Ali, Mohammad Ranjbar, Mahin Schaffie, and Jochen Petersen "Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems." <i>Hydrometallurgy</i> (2012) http://hdl.handle.net/11427/21555en_ZA
dc.identifier.citationAhmadi, A., Ranjbar, M., Schaffie, M., & Petersen, J. (2012). Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems. Hydrometallurgy, 127, 16-23.en_ZA
dc.identifier.issn0304-386Xen_ZA
dc.identifier.ris TY - Journal Article AU - Ahmadi, Ali AU - Ranjbar, Mohammad AU - Schaffie, Mahin AU - Petersen, Jochen AB - In this paper a model of conventional and electrochemical bioleaching of high grade complex copper sulfide ores or flotation concentrates in isothermal stirred tank reactors is presented and compared to experimental data. Experiments were conducted in an electrobioreactor using a mixed culture of moderate thermophile microorganisms at pulp density 20% (w/v), leaching time 10 days, stirring rate 600 rpm and temperature 50 °C. The behavior of conventional and electrochemical bioleaching processes was described with a combined reaction-based kinetic model. The model considers the effects of mineralogical composition of the feed, the properties of the initial solution, the presence of iron- and sulfur oxidizing microorganisms and both the passivation and electroreduction of chalcopyrite on the values of copper recovery, pH and redox potential during the processes. Comparing the values obtained from the integrated semi-empirical model with the experimental data showed that the model results are in good agreement with the real leaching data of copper recovery, ORP (oxidation reduction potential) and pH for the mentioned processes under different experimental conditions. DA - 2012 DB - OpenUCT DP - University of Cape Town J1 - Hydrometallurgy LK - https://open.uct.ac.za PB - University of Cape Town PY - 2012 SM - 0304-386X T1 - Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems TI - Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems UR - http://hdl.handle.net/11427/21555 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21555
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0304386X12001429
dc.identifier.vancouvercitationAhmadi A, Ranjbar M, Schaffie M, Petersen J. Kinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systems. Hydrometallurgy. 2012; http://hdl.handle.net/11427/21555.en_ZA
dc.languageengen_ZA
dc.publisherElsevieren_ZA
dc.publisher.institutionUniversity of Cape Town
dc.sourceHydrometallurgyen_ZA
dc.source.urihttp://www.sciencedirect.com/science/journal/0304386X
dc.subject.otherKinetic modeling
dc.subject.otherBioleaching
dc.subject.otherCopper concentrate
dc.subject.otherStirred reactor
dc.subject.otherElectrochemistry
dc.titleKinetic modeling of bioleaching of copper sulfide concentrates in conventional and electrochemically controlled systemsen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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