Effect of Rare Earth Elements on Exchange Performances of Cesium Ion-Sieve

摘要

The exchange performances and the distribution coefficient of Cesium Ion-Sieve (Cs-IS) for cesium and for some rare earth elements were compared. In particular, the effects of neodymium on the cesium ion exchange and the Cs~+ selectivity variation on Cs-IS owing to introduction of rare earth elements into HLLW were studied. Though rare earth elements exhihit a small influence on the distribution coefficient for Cs~+, they impair Cs-exchange capacity of Cs-IS to some extent. This interruption on the selectivity to Cs~+ can be significantly eliminated provided an appropriate ratio of liquid to solid V:m is used.