Anion concentration-dependent partitioning mechanism in the extraction of uranium into room-temperature ionic liquids

被引:189
作者
Dietz, Mark L. [1 ]
Stepinski, Dominique C. [1 ]
机构
[1] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA
基金
美国能源部;
关键词
uranium; extraction; tri-n-butyl phosphate; ionic liquids;
D O I
10.1016/j.talanta.2007.11.051
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The mode of partitioning of uranyl ion between nitrate-containing aqueous phases and various N,N'-dialkylimidazolium-based room-temperature ionic liquids (RTILs) in the presence of tri-n-butyl phosphate (TBP) is shown to change from an ion-exchange process to one involving extraction of a neutral uranyl-TBP-nitrato complex as the aqueous nitrate concentration is increased. Increasing the hydrophobicity of the RTIL cation eventually leads to nitrato complex extraction as the predominant mode of partitioning, regardless of nitrate concentration. Published by Elsevier B.V.
引用
收藏
页码:598 / 603
页数:6
相关论文
共 61 条
[51]   Ionic liquids are not always green: hydrolysis of 1-butyl-3-methylimidazolium hexafluorophosphate [J].
Swatloski, RP ;
Holbrey, JD ;
Rogers, RD .
GREEN CHEMISTRY, 2003, 5 (04) :361-363
[52]  
Visser A.E., 2000, CALIXARENES SEPARATI, P223
[53]   Uranyl coordination environment in hydrophobic ionic liquids: An in situ investigation [J].
Visser, AE ;
Jensen, MP ;
Laszak, I ;
Nash, KL ;
Choppin, GR ;
Rogers, RD .
INORGANIC CHEMISTRY, 2003, 42 (07) :2197-2199
[54]   Traditional extractants in nontraditional solvents: Groups 1 and 2 extraction by crown ethers in room-temperature ionic liquids [J].
Visser, AE ;
Swatloski, RP ;
Reichert, WM ;
Griffin, ST ;
Rogers, RD .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2000, 39 (10) :3596-3604
[55]   Room-temperature ionic liquids:: new solvents for f-element separations and associated solution chemistry [J].
Visser, AE ;
Rogers, RD .
JOURNAL OF SOLID STATE CHEMISTRY, 2003, 171 (1-2) :109-113
[56]   Liquid/liquid extraction of metal ions in room temperature ionic liquids [J].
Visser, AE ;
Swatloski, RP ;
Griffin, ST ;
Hartman, DH ;
Rogers, RD .
SEPARATION SCIENCE AND TECHNOLOGY, 2001, 36 (5-6) :785-804
[57]  
VISSER AE, 2002, P INT SOLV EXTR C IS, P474
[58]   Recovery of amino acids by imidazolium based ionic liquids from aqueous media [J].
Wang, JJ ;
Pei, YC ;
Zhao, Y ;
Hu, ZG .
GREEN CHEMISTRY, 2005, 7 (04) :196-202
[59]   Studies on liquid/liquid extraction of copper ion with room temperature ionic liquid [J].
Wei, GT ;
Chen, JC ;
Yang, ZS .
JOURNAL OF THE CHINESE CHEMICAL SOCIETY, 2003, 50 (06) :1123-1130
[60]   Room temperature ionic liquid as a novel medium for liquid/liquid extraction of metal ions [J].
Wei, GT ;
Yang, ZS ;
Chen, CJ .
ANALYTICA CHIMICA ACTA, 2003, 488 (02) :183-192