[2J17-19] Separation Behavior of FPs

[2J19] Fundamental study on separation of Pd(Ⅱ) using thiourea type ligand by PNIPAAm

*Hiroki Yamazaki¹, Noriko Asanuma¹, Haruka Tateno², Takehiko Tsukahara² (1. Tokai University, 2. Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology)

Keywords:Diphenyl thiourea, Dialkyl thiourea, HNO3

High-level radioactive liquid waste contains Pd (Ⅱ) which interferes with the vitrification process, and it is necessary to separate it. Poly(N-isopropylacrylamide) (PNIPAAm) has a character of hydrophilicity / hydrophobicity change at the lower limit critical temperature. It was found that metal ions in aqueous solution can be separated by hydrophobic interaction between ligand and PNIPAAm with only temperature change. In this study, using a hydrophobic thiourea derivative as a ligand, a basic study for Pd (Ⅱ) separation by PNIPAAm was conducted.