Anion-exchange behavior of rare earths,thorium, protactinium and uranium in thiocyanate-chloride media |
| |
Authors: | Hiroshi Hamaguchi Koji Ishida Rokuro Kuroda |
| |
Institution: | Department Of Chemistry, Tokyo Kyoiku University, Koishikawa, TokyoJapan |
| |
Abstract: | The anion exchange of rare earths(III), thorium(IV), protactinium(V) and uranium (VI) from thiocyanate-chloride media was investigated. The equilibrium, distribution study showed that the rare earths(III) and yttrium(III) were not significantly adsorbed on a basic anion-exchangc resin, while thorium(IV), protactinium(V) and uranium(VI) were strongly adsorbed. Adsorption from the thiocyanate-chloride solutions is in the order, U(Vl) > Pa(V) > Th(IV). The separation of rare earths(III) or yttrium(III), thorium(IV), protactinium(V) and uranium(VI) was successfully accomplished by column elution in thiocyanate-chloride media. A rapid and effective ion-exchange method for separating protactinium-233 from irradiated thorium(IV) is also presented. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|