Separation of actinides(III) from lanthanides(III) in simulated nuclear waste streams using 6,6′-bis-(5,6-dipentyl-[1,2,4]triazin-3-yl)-[2,2′]bipyridinyl (C5-BTBP) in cyclohexanone

被引：85
作者：
Nilsson, Mikael
Ekberg, Christian
Foreman, Mark
Hudson, Michael
Liljenzin, Jan-Olov
Modolo, Giuseppe
Skarnemark, Gunnar
机构：
[1] Chalmers Univ Technol, Dept Biol & Chem Engn, S-41296 Gothenburg, Sweden
[2] Univ Reading, Dept Chem, Reading RG6 2AD, Berks, England
[3] Forschungszentrum Julich GmbH, Inst Sicherheitsforsch & Reaktortech, Julich, Germany
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 2006年 / 24卷 / 06期
关键词：
solvent extraction; BTBP; americum(III); curium(III); californium(III); lanthanides(III);
D O I：
10.1080/07366290600952659
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
An extraction system comprising 6,6'-bis-(5,6-dipentyl-[1,2,4] triazin-3-yl)[ 2,2'] bipyridinyl (C5-BTBP) dissolved in cyclohexanone was investigated. The main purpose of this investigation was to extract and separate actinides(III) from lanthanides(III), both of which are present in the waste from the reprocessing of spent nuclear fuel. The system studied showed high distribution ratios for the actinides( III) and a high separation factor between actinides and lanthanides (SFAm/Eu around 150). The extraction kinetics were fast with equilibrium being reached in 5 minutes. The effects of temperature on the extraction and the stoichiometry of the extracted complex were investigated. The extraction of californium( III) was studied and it was found that the BTBP molecule has a higher affinity for californium than for americium (SFCf/Am around 4). This system could be used to separate actinides( III) from lanthanide fission products with high efficiency, if used in conjunction with a pre-equilibrium step.
引用
收藏
页码：823 / 843
页数：21
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