1996 Volume 12 Issue 6 Pages 935-940
Zirconium phosphate, HZr2(PO4)3 (NZP), in a powder form was synthesized from zirconium chloride oxide and sodium dihydrogenphosphate, and its ion exchange adsorption properties to alkali metal ions were studied. The ion-exchange adsorption partition coefficients of NZP to alkali metal ions at pH=3.4 were found to be 3.2×103(Li+), 4.5×105(Na+), 2.6 (K+), 12 (Rb+), and 380 (Cs+) cm3 g-1. The results indicate that NZP has a high adsorbability to sodium ions. Mixed granules of NZP and silica sol (NZP-P) were then prepared and applied for the selective removal of sodium ions by a column adsorption method.
