A study has been made of the cathodic deposition of copper ions from flowing dilute aqueous solutions onto a packed bed of graphite. The electrodeposition reaction is mass transfer controlled and expressions are presented for the cathodic current as a function of time, solution flow rate and bed characteristics. These have been verified from potentiostatic experiments. The cathode current efficiency is shown to approach 100% and packed bed electrodes are shown to be an effective means of extracting or removing metal ions from dilute solutions.
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Chu, A.K.P., Fleischmann, M. & Hills, G.J. Packed bed electrodes. I. The electrochemical extraction of copper ions from dilute aqueous solutions. J Appl Electrochem 4, 323–330 (1974). https://doi.org/10.1007/BF00608974
- Aqueous Solution
- Mass Transfer
- Current Efficiency
- Effective Means