Separation of actinoids from HLW by thiacalix[4]arene compound impregnated silica ion-exchanger

被引：9

作者：

Kikuchi, T ^{[1
]}

Goto, I ^{[1
]}

Suzuki, K ^{[1
]}

机构：

[1] Inst Res & Innovat, Chiba 2770861, Japan

来源：

PROGRESS IN NUCLEAR ENERGY | 2005年 / 47卷 / 1-4期

关键词：

Americium; lanthanoids; separation; thiacalix[4]arene; ion-exchange; TRIVALENT ACTINIDES; SOLVENT-EXTRACTION; METAL-IONS; LANTHANIDES;

D O I：

10.1016/j.pnucene.2005.05.039

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

If trivalent actinoids such as Am can be separated from high-level radioactive liquid waste (HLLW) generated by the PUREX process, long-term heat and radiation hazards can be significantly reduced in the disposal of this waste. This paper reports the effective separation of Am through the use of a chelating ion-exchange method that uses an octylphenyl-N,N-diisobutylcarbomoyl phosphine oxide (CMPO) or thiacalix[4]arene compound impregnated silica ion-exchanger. The separation of Cs and Sr from HLLW can be achieved using a CMPO impregnated silica ion-exchanger (CMPO-exchanger). Actinoids and lanthanoids can then be eluted from the CMPO-exchanger, with the resulting solution then treated to separate the actinoids using a thiacalix[4]arene compound impregnated silica ion-exchanger. Thiacalix[4]arene compound impregnated silica ion-exchangers have been shown to effectively separate actinoids from lanthanoids in a weak-acid solution. The influence of gamma ray irradiation on adsorption is also investigated. The adsorption of Am remains high even after irradiation of the ion-exchanger. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：397 / 405

页数：9

共 7 条

[1] High complexation ability of thiacalixarene with transition metal ions. The effects of replacing methylene bridges of tetra(p-t-butyl)calix[4]arenetetrol by epithio groups [J].