Extraction of Uranium(VI) from Nitric Acid Solution Using Pyrrolidone Derivatives
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概要
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The extraction behavior of uranyl species from HNO3 aqueous solutions using CH2Cl2 containing pyrrolidone derivatives as extractants has been studied to find an alternative to tributyl phosphate as an extractant. In this study, we used N-cyclohexyl-2-pyrrolidone (NCP), N-octyl-2-pyrrolidone (NOP), and N-dodecyl-2-pyrrolidone (NDP) as the extractants. As a result, it was found that NCP, NOP, and NDP (abbreviated as NRP) extract U(VI) as UO2(NO3)2(NRP)2, that a part of NCP in CH2Cl2 phase is moved to the aqueous phase, and that the extractability (corresponding distribution ratio) of U(VI) increases with increasing [HNO3]int from 7% (0.08) ([HNO3]int=0.1 M, [NRP]int=1.0 M) to more than 90% (11) ([HNO3]int=3.0 M, [NRP]int=1.0 M). From these results, it is expected that NOP and NDP extract U(VI) effectively from HNO3 solution of more than 3 M and that the extracted U(VI) species are stripped by using HNO3 aqueous solution of low concentration.
- 社団法人 日本原子力学会の論文
- 2009-08-01
著者
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Takahashi Yuya
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Ikeda Yujiro
Japan Atomic Energy Research Institue
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NOGAMI Masanobu
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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IKEDA Yasuhisa
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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NODA Kyoko
Research Laboratory for Nuclear Reactor, Tokyo Institute of Technology
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HOTOKEZAKA Hiroyasu
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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Noda Kyoko
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Ikeda Y
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Ikeda Yasuhisa
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Ikeda Yasuhisa
Res. Lab. For Nuclear Reactors Tokyo Inst. Of Technol.
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Nogami Masanobu
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Hotokezaka Hiroyasu
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Nogami Masanobu
Research Laboratory for Nuclear Reactor, Tokyo Institute of Technology
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