Articles written in Journal of Chemical Sciences
Volume 130 Issue 8 August 2018 Article ID 0111
This paper shows the selective drift of cationic aqua complexes of chloride salts of metal ions in aqueous solutions under the exposure an asymmetric electric field (100 Hz, 750/150 V). The spatial distribution of Ce 3+ and Ni+2 cations was demonstrated, and the maximum cation separation coefficients in the longitudinalsection of the inter-electrode space were calculated for the stationary and circulating solution for different exposure durations of the electric field and solution circulation rates. A decrease in the relative concentration of cations was observed when moving from top down of the experimental cell, while the direction of cation drift along the sectional plane was independent of the distance from electrodes, the solution circulation rate, and nature of metal. It was established that while the solution moved from the grounded electrode to the potentialelectrode along the bottom and top parts of the sections, there was a decrease of concentrations of both cations in the central part of the cell and an increase near the electrodes. On the basis of the obtained data, the optimal points of sampling and drop were determined. The calculated maximum separation coefficients of Ce3+ and Ni2+ ions were 1.200 ± 0.108 and 1.036 ± 0.025, for the stationary and circulating solution at a rate of 7 L· h -1, respectively.
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