ION-EXCHANGE SEPARATION OF SODIUM AND POTASSIUM IONS ON DIHYDROGEN TETRATITANATE HYDRATE FIBERS AT VARIOUS TEMPERATURES

ABSTRACT The distribution coefficients of sodium and potassium ions on crystalline dihydrogen tetratitanate hydrate fibers, were determined at 298, 313, 333, and 353 K as a function of pH. The adsorption behavior of the two metal ions was well explained by their ion-exchange reaction with hydrogen-ions in the fibers. The ion separation of sodium and potassium ions was successful by using a column of this ion exchanger with hydrochloric acid solutions as an eluent.