[2K05-09] Minor actinides recovery

[2K07] Depending on the degree of crosslinking of the Sty-DVB carrier, Changes in adsorption / elution characteristics

*Ena Pe¹, Tsuyoshi Arai^2,4, Sou Watanabe³, Yuichi Sano³, Masayuki Takeuti³, Kohei Nagosi³, Ryoji Abe⁴ (1. Tokyo Institute of Technology Graduate School, 2. Shibaura Institute of Technology, 3. Japan Atomic Energy Agency, 4. Shibaura Institute of Technology Graduate School)

Keywords:High level radioactive waste liquid, extraction chromatography, CMPO, europium

In this research, we investigated the effect of styrene-divinylbenzene (Sty - DVB) focusing on the degree of crosslinking of the support, we investigated the influence of these on the adsorption / elution characteristics in detail.Porous SiO₂ particles with an average particle size of 50 mm and an average pore size of 600 nm were crosslinked with 5-20 %, Respectively, and then loaded with Octyl (phenyl) -N, N-diisobutyl-carbamoyl methyl-phosphine oxide (CMPO) extractant at 20 wt%, respectively, to obtain a CMPO adsorbent To the test solution, a nitric acid solution having a predetermined concentration was prepared so that the concentration of Eu (III) was 10 mM Various performances of CMPO adsorbent were studied by batch type adsorption test and column test.The degree of crosslinking degree of 10% was the most adsorptive performance and the degree of crosslinking was 15% was the most excellent elution performance.