円柱状微小液滴/溶液系におけるリン酸トリブチルによるランタノイドの抽出・逆抽出過程の速度論的検討

Kinetic analysis of extraction-back extraction of lanthanoid with tributyl phosphate in the cylindrical micro droplet/solution system

草野 祐香*; 中川 稜悟*; 長友 重紀*; 佐野 雄一   ; 中谷 清治*

Kusano, Yuka*; Nakagawa, Ryogo*; Nagatomo, Shigenori*; Sano, Yuichi; Nakatani, Kiyoharu*

微小電極上に形成した円柱状空洞にリン酸トリブチル抽出剤を充填し、硝酸溶液に浸して円柱状液滴にレーザー光照射し、ランタノイド錯体の発光強度の経時変化を追跡した。経時変化は単一指数関数で解析し、抽出・逆抽出速度を算出した。液滴内外の拡散、界面反応等の観点から物質移動機構を速度論的に議論した。

The columnar cavities formed on the microelectrodes were filled with a tributyl phosphate extractant, immersed in a nitric acid solution, and irradiated with laser light on the columnar droplets, and the temporal changes in the luminescence intensity of the lanthanoid complex were tracked. The change with time was analyzed by a single exponential function, and the extraction and back-extraction rates were calculated. The mechanism of mass transfer was discussed kinetically from the viewpoints of diffusion inside and outside the droplet, interfacial reaction, etc.