Electrochemical behaviour and electrowinning of rhodium in acidic chloride solution
- 307 Downloads
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.
KeywordsRhodium Chloride solution Electrowinning Cyclone cell
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.
- 1.Reid FH (1963) Electrodeposition of the platinum-group metals. Met Rev 8:167–211Google Scholar
- 3.Roth JF (1975) The production of acetic acid. Platinum Metals Rev 19:12–14Google Scholar
- 17.Dhamo N, Kammel R (1992) Electrochemical hydrocyclone-cell for metal recovery from dilute solutions. Metall 46:912–916Google Scholar
- 20.Wythers MC (2012) Advances in materials science research. Nova, New York, pp 257–274Google Scholar
- 21.Milazzon G (1963) Electrochemistry, theoretical principles and practical applications. Elsevier, Amsterdam, pp 160–172Google Scholar
- 22.Levich VJ (1962) Physicochemical hydrodynamics. Prentice-Hall, Englewood, p 69Google Scholar
- 23.Lin CS, Denton EB, Gaskill HS, Putnam GL (1951) Diffusion-controlled Electrode Reactions. Ind Eng Chem 43:2136–2143. doi: 10.1021/ie5051a045