Micro-PIXE analysis on adsorbent of extraction chromatography for MA(III) recovery

Takahatake, Yoko; Watanabe, So; Kofuji, Hirohide; Takeuchi, Masayuki; Nomura, Kazunori; Sato, Takahiro*

International Journal of PIXE, 26(3&4), p.73 - 83, 2017/09

BB2016-1248.pdf:0.36MB

https://doi.org/10.1142/S0129083517500012

JAEA has been conducting research and development of MA(III) recovery from HLLW by extraction chromatography technology for reduction in amount and environmental impact of radioactive waste. The behavior of adsorbed cations inside the adsorbent packed in a column is necessary to be evaluated for improvement of the adsorbent or flow-sheet to achieve targeted MA(III) recovery performance. In this paper, micro-PIXE analysis was carried out on the particles sampled from various positions of the column to reveal the behavior of cations inside the packed column with CMPO/SiO -P adsorbent. Simple experiment and data analysis were shown to be effective to reveal inside of the column, and formation and transportation of the adsorption bands were observed for some cations which are extractable by the CMPO extractant. Some part of Zr(IV) and Mo(VI) were found to remain inside the column without distinct transportation even after the elution operation.

Vitrification properties of minor actinide adsorbents

Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi

no journal, , 

The extraction chromatography technique has been developed as the minor actinides (MA) recovering method from high radioactive liquid waste generating in the reprocessing process. MA adsorbent was made of porous silica covered with polymer and MA extractant, therefor it could be used as the raw material of vitrified high level waste directly and final waste volume could be drastically reduced. In this study, the vitrification properties were evaluated for the silica based adsorbent containing polymer, extractant and waste simulant.