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Yokota, Hiromi*; Fujimoto, Katsushige*; Kawakami, Tomohiko*; Nagayama, Sakiko*; Abe, Yuta; Otaka, Masahiko
no journal, ,
no abstracts in English
Kawakami, Tomohiko*; Nagayama, Sakiko*; Yokota, Hiromi; Abe, Yuta; Otaka, Masahiko; Fujimoto, Katsushige*; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Okamura, Hiroyuki; Kozai, Naofumi
no journal, ,
Technetium-99 is a long-lived radionuclide with a half-life of 210,000 years, and is also contained as an anion in radioactively contaminated water generated from the Fukushima Daiichi Nuclear Power Plant. However, there are few studies on treatment techniques for anionic nuclides compared to those for cationic nuclides. Therefore, it is desired to develop a novel technique capable of efficiently separating anionic nuclides including technetium from an aqueous solution such as radioactively contaminated water. In this study, we focused on a protic ionic liquid ([TOAH][Cl]) consisting of a proton adduct of trioctylamine (TOA) and a chloride ion. The extraction separation of perrhenate ion (ReO
), which is an analog of pertechnetate ion, was investigated. In the case of using [TOAH][Cl], it was found that ReO can be efficiently extracted and separated into the ionic liquid phase at pH 1.0-8.8, including the neutral region, which is the pH of radioactively contaminated water, unlike the organic solvent system. Furthermore, the extraction of ReO with [TOAH][Cl] was hardly affected by coexisting ions. Thus, it was suggested that the developed protic ionic liquid can efficiently separate technetium from neutral aqueous solutions such as radioactively contaminated water.
Cl and 
FeShimada, Asako; Ohira, Saki; Iida, Yoshihisa
no journal, ,
no abstracts in English