Abstract
In order to recover potassium from sea water and brine, a study was made on the effects of mixed ratios in the preparation of exchangers. Results were as follows:
(1) The degree of crystallinity varied with an increase in the mixed ratio of phosphate or polyphosphate to zirconium at the time of preparation, and it became more crystalline gel from themost a morphous gel.On the others hand, the ion selectivity changed in proportion to the variation of crystallinity.
(2) It was found that the ion exchange reaction indicated two different reaction forms accordingto the mixed ratio at the time of preparation. The first one was Na+>K+>Mg2+-Ca2+when the adsorption was evaluated by mg/g exchangers, and the second one was K+>Na+>Mg2+-Ca2+.
(3) The selective adsorption property was classified easily by apparent volume of wetexchangerjust like the results of our study reported in our previous papers.
