用磷酸锆-磷钼酸铵复合交换剂从动力堆元件废液中提取^(137)Cs的研究

STUDIES ON RECOVERY OF ^(137)CS FROM WASTE SOLUTION OF POWER REACTOR FUELS WITH ZIRCONIUM PHOSPHATE——AMMONIUM PHOSPHOMOLYBDATE COMPLEX INORGANIC ION EXCHANGER

一、前言从六十年代中期开始,采用无机离子交换剂提取铯已成为重要的分离手段,它与有机树脂和有机溶剂相比,具有良好的辐照稳定性、热稳定性及高度的选择性,因此,近些年以来,许多国家对无机离子交换剂曾进行了广泛的研究.在无机离子交换剂中,对磷酸锆(ZrP)研究的比较多。

In this paper the preparation of zirconium phosphate-ammonium phos- phomolybdate is studied.The compound has very high selectivity for Cs^+. Its break-through capacities at C/C_0=0.01 were found to be 0.28 meq/g for caesium in simulation solutions of 1N HNO_3.An overall elution yield of 99% is attained in a total of 9 bed volume of the elutrient with 0.1N HNO_3+5N NH_4NO_3 at 60℃.The contamination percent was 1.5 in eluant. Meantime,the loss of ^(241)Am is less than 0.5%.It can be used as a recovery material for ^(137)Cs from 1 AW waste solution.