Fast selective homogeneous extraction of UO22+ with carboxyl-functionalised task-specific ionic liquids

被引：13
作者：
Ao, Yinyong [1 ,2 ]
Chen, Jian [1 ,2 ]
Xu, Min [2 ]
Peng, Jing [2 ]
Huang, Wei [1 ]
Li, Jiuqiang [2 ]
Zhai, Maolin [2 ]
机构：
[1] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Peoples R China
[2] Peking Univ, BNLMS, Dept Appl Chem, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
来源：
SCIENTIFIC REPORTS | 2017年 / 7卷
基金：
中国国家自然科学基金;
关键词：
ENERGY-ADJUSTED PSEUDOPOTENTIALS; SOLVENT-EXTRACTION; RADIOLYTIC PRODUCTS; URANYL COMPLEXES; PHASE-BEHAVIOR; METAL-IONS; ACTINIDE; BIS(TRIFLUOROMETHYLSULFONYL)IMIDE; SEPARATION; GREENNESS;
D O I：
10.1038/srep44100
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The carboxyl-functionalised task-specific ionic liquid of 1-carboxymethyl-3-methylimidazolium bis(trifluoromethyl-sulfonyl) imide ([HOOCmim][NTf2]) was used as solvent and extractant for UO22+ extraction from aqueous solution. A homogeneous phase of [HOOCmim][NTf2]-H2O system could be achieved at 75 degrees C, and 86.8 +/- 4.8% of UO22+ was separated from the aqueous solution after vibrating for only 1 min. Furthermore, nearly 97.3 +/- 2.9% of UO22+ was stripped from [HOOCmim][NTf2] phase by 1 M HNO3 solution. K+, Na+, Mg2+, Dy3+, La3+, and Eu3+ have little influence on the homogeneous extraction of UO22+, and the extraction efficiency of UO22+ still remained at ca. 80%. Experimental and theoretical study on the selectivity of [HOOCmim][NTf2]-H2O system were performed for the first time. Density functional theory calculation indicates that the solvent effect plays a significant role on the selectivity of [HOOCmim][NTf2]-H2O.
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页数：8
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