HF/HNO水溶液中におけるNb, Ta, Paの陰イオン交換実験; Dbフッ化物錯体の推定に向けて

Anion-exchange behavior of Nb, Ta, and Pa in HF/HNO solution for understanding chemical species of Db

安達 サディア*; 末木 啓介*; 豊嶋 厚史*; 塚田 和明  ; 羽場 宏光*; 小森 有希子*; 横北 卓也*; 森 大輝*

Adachi, Sadia*; Sueki, Keisuke*; Toyoshima, Atsushi*; Tsukada, Kazuaki; Haba, Hiromitsu*; Komori, Yukiko*; Yokokita, Takuya*; Mori, Taiki*

ドブニウムフッ化物錯体の化学種推定に向けた基礎実験として、HF/HNO水溶液でニオブ, タンタル, プロトアクチニウムの陰イオン交換実験を行なった。HNO濃度ごとに、フッ化物イオン濃度を変化させ陰イオン交換挙動を調べた。講演ではその分配係数の変化から錯形成について考察し、ドブニウムの化学種検討を行なう。

Anion exchange behavior of group-5 elements, Nb, Ta, and their pseudo homologue Pa in HF and HF/HNO solution was investigated to understand chemical properties of Db. Adsorption behavior of Db is clearly different from that of Ta and is similar to those of Nb and Pa. In the present study, anion exchange experiments of Nb, Ta and Pa were carried out with HF/HNO aqueous solution as basic experiments for estimating the species of Db fluoride complex. Adsorption behavior was investigated by changing the fluoride ion concentration for each HNO concentration. Based on the observed distribution coefficients of these elements, we discuss the formation reaction of the anionic fluoride complex and chemical species of Db.