Add time:08/17/2019         Source:sciencedirect.com

Polarization behaviour of Eu, Sm, and Gd was investigated in acidic sulfate solutions using Cu and Cu–Hg cathodes and electrolytic reduction–precipitation of europium from sulfate solutions was studied using a mercury-coated copper electrode. The effect of magnetic stirring, N2 gas sparging, and use of a cation permeable membrane on electrolytic reduction was determined. Europium recovery of 71.9% for magnetic stirring increases to 74.4% for N2 gas sparging and to 79.5% for N2 gas sparging+membrane system. The purity of the precipitated EuSO4 is 98.5%, 96.0%, and 94.4%, respectively.

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