[2A21-24] Vitrification 4

[2A21] Development of Recovery Process of Platinum-group Metals from HLLW for Stable Production and Volume Reduction of Homogeneous Vitrified Object

(24)Comprehensive evaluation of sorbent for separation of platimum group species

*Ippei AMAMOTO¹, Hidekazu KOBAYASHI¹, Yasuo AYAME¹, Takashi OHNISHI¹, Akiko KOSHIZAKA², Yoshio HASEGAWA², Yusuke INABA³, Kazuo UTSUMI³, Kenji TAKESHITA³, Jun ONOE⁴ (1. JAEA, 2. Art Kagaku, 3. Tokyo Tech, 4. Nagoya Univ.)

Keywords:hi-level radioactive liquid waste, vitrification, porous silica material, aluminium ferrocyanide, sorbent , Platinum Group Species (PGS), static leach test

The development on synthesis of sorbent was carried out to separate the platinum group species such as Ru, Rh and Pd in high-level radioactive liquid waste.
After sorption test using developed sorbents, the spherical porous silica impregnated aluminium ferrocyanide was effective to sorb the species of Ru and Pd in the nitric solution.
This sorption effect remained stable when tested on actual high-level radioactive liquid waste. It was found that more treated waste could be loaded into the borosilicate glass than untreated waste.