Abstract
The proton-type crystalline zirconium phosphate, HZr 2(PO 4) 3, was obtained by a thermal decomposition of NH 4Zr 2(PO 4) 3 at different temperatures from 400 to 800 °C, where NH 4Zr 2(PO 4) 3 was obtained in advance by a hydrothermal synthesis using a mixed solution of ZrOCl 2, H 3PO 4 and H 2C 2O 4 with different processing times from 5 to 72 h. Sr ion was immobilized to HZr 2(PO 4) 3 by treating the mixture of HZr 2(PO 4) 3 and Sr(NO 3) 2 aqueous solution in an autoclave at 250 °C. Immobilizing and leaching performance of St in HZr 2(PO 4) 3 were discussed.
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