The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching
| dc.contributor.author | Tshilombo, A F | |
| dc.contributor.author | Petersen, J | |
| dc.contributor.author | Dixon, D G | |
| dc.date.accessioned | 2016-08-25T11:45:23Z | |
| dc.date.available | 2016-08-25T11:45:23Z | |
| dc.date.issued | 2002 | |
| dc.date.updated | 2016-08-23T13:16:36Z | |
| dc.description.abstract | Electrochemical techniques were conducted to clarify the role of solution potential and temperature under a variety of experimental conditions similar to those found during the mesophilic and thermophilic biooxidation of chalcopyrite (CuFeS2). Despite a large number of publications dealing with the bacterial leaching of CuFeS2, three central aspects remain unclear: How to dissolve preferentially copper from CuFeS2, the effect of temperature on the extent of CuFeS2 passivation, and the behavior of ferric ions on a polarized CuFeS2 surface. Anodic characteristics showed that CuFeS2 passivation was more severe in the potential range 0.45–0.65 V saturated calomel electrode at 25 C. However, there was no evidence of CuFeS2 passivation at higher temperatures (45 and 65 C). Cu was preferentially dissolved from CuFeS2 at lower potentials and high temperatures at a ratio copper to iron of about 3:2. Cathodic characteristics showed that the ferric ions inhibited the leaching process when the CuFeS2 surface was polarized at high potentials and low temperatures. | en_ZA |
| dc.identifier | http://dx.doi.org/10.1016/S0892-6875(02)00122-X | |
| dc.identifier.apacitation | Tshilombo, A. F., Petersen, J., & Dixon, D. G. (2002). The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching. <i> Minerals Engineering</i>, http://hdl.handle.net/11427/21550 | en_ZA |
| dc.identifier.chicagocitation | Tshilombo, A F, J Petersen, and D G Dixon "The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching." <i> Minerals Engineering</i> (2002) http://hdl.handle.net/11427/21550 | en_ZA |
| dc.identifier.citation | Tshilombo, A. F., Petersen, J., & Dixon, D. G. (2002). The influence of applied potentials and temperature on the electrochemical response of chalcopyrite during bacterial leaching. Minerals Engineering, 15(11), 809-813. | en_ZA |
| dc.identifier.issn | 0892-6875 | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - Tshilombo, A F AU - Petersen, J AU - Dixon, D G AB - Electrochemical techniques were conducted to clarify the role of solution potential and temperature under a variety of experimental conditions similar to those found during the mesophilic and thermophilic biooxidation of chalcopyrite (CuFeS2). Despite a large number of publications dealing with the bacterial leaching of CuFeS2, three central aspects remain unclear: How to dissolve preferentially copper from CuFeS2, the effect of temperature on the extent of CuFeS2 passivation, and the behavior of ferric ions on a polarized CuFeS2 surface. Anodic characteristics showed that CuFeS2 passivation was more severe in the potential range 0.45–0.65 V saturated calomel electrode at 25 C. However, there was no evidence of CuFeS2 passivation at higher temperatures (45 and 65 C). Cu was preferentially dissolved from CuFeS2 at lower potentials and high temperatures at a ratio copper to iron of about 3:2. Cathodic characteristics showed that the ferric ions inhibited the leaching process when the CuFeS2 surface was polarized at high potentials and low temperatures. DA - 2002 DB - OpenUCT DP - University of Cape Town J1 - Minerals Engineering LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 SM - 0892-6875 T1 - The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching TI - The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching UR - http://hdl.handle.net/11427/21550 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/21550 | |
| dc.identifier.vancouvercitation | Tshilombo AF, Petersen J, Dixon DG. The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching. Minerals Engineering. 2002; http://hdl.handle.net/11427/21550. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | Elsevier | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.rights | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | en_ZA |
| dc.source | Minerals Engineering | en_ZA |
| dc.source.uri | http://www.sciencedirect.com/science/journal/08926875 | |
| dc.subject.other | Leaching | |
| dc.subject.other | Oxidation | |
| dc.subject.other | Bacteria | |
| dc.title | The influence of applied potentials and temperature on the electrochemical response of Chalcopyrite in Bacterial Leaching | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |