Dynamics of three-component exchange on a cationite with lithium manganese spinel structure

The dynamics of the sorption of lithium ions on a cationite with lithium manganese spinel structure from neutral solutions against the background of a large amount of sodium ions was studied. It was demonstrated that the dynamics of the ion exchange of these ions from their mixed solutions differs significantly from that observed for their individual solutions. The experimental results can be explained by assuming that, at a large concentration of sodium ions in the solution, they saturate the surface of the cationite and that lithium ions are predominantly exchanged for sodium ions. This assumption is supported by the results of a mathematical modeling.