2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 2: Mineral Processing
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 446 pages |
| ISBN: | 978-1-987820-04-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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ELECTROCHEMICAL BEHAVIOR OF GALVANIC INTERACTION BETWEEN CHALCOPYRITE AND GALENA
Marcelle Ingrid Idelfonso1; Carlos Roberto Falcao Albuquerque Junior1;1UEZO, Rio de Janeiro, Brazil;
Type of Paper: Regular
Id Paper: 107
Topic: 2
Abstract:
Electrochemistry of sulphide minerals is the subject of many researches due to its semiconducting properties and the possibility of metals extraction associated with them.
This study evaluated the electrochemical behavior of chalcopyrite (CuFeS2) and galena (PbS) samples, in the light of electrochemistry, in order to evaluate the effect of interaction between the different samples on their potential values in the absence and in the presence of previous oxidation of mineral surfaces.
The rest of the potential measures have been taken in relation to a saturated calomel electrode (ECS; E0 = 0,242 V) for a period of 120 minutes in the presence of air, in the absence and presence of electric interconnection between them. In the absence of interaction, chalcopyrite suffered oxidation while galena was reduced. When the electrodes were connected electrically, chalcopyrite exhibited similar behavior, but galena behaved similarly to chalcopyrite surface; this same behavior was also observed in previously oxidized electrodes.