Abstract
The electrochemical behaviour and recovery of rhodium in an acidic solution were investigated using a rotating disc electrode system and a modified electrochemical cyclone cell, respectively. The electrochemical polarization data indicated that the Rh3+ ions were reduced to metallic Rh below −0.1 V, and the limiting current density for rhodium deposition was observed at around −0.3 V (vs. SCE) with a diffusion coefficient of 6.3 × 10−6 cm2 s−1 using the Levich equation. The effects of the applied voltage and the initial concentration of rhodium were examined using the modified cyclone cell, and more than 91 % of the rhodium in solution was recovered within 2 h under the optimal conditions.
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This research was supported by the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) funded by the Ministry of Science, ICT and Future Planning of Korea.
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Yu, BC., Kim, SK., Sohn, JS. et al. Electrochemical behaviour and electrowinning of rhodium in acidic chloride solution. J Appl Electrochem 44, 741–745 (2014). https://doi.org/10.1007/s10800-014-0683-1
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DOI: https://doi.org/10.1007/s10800-014-0683-1