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Competitive complexation of solid lanthanide nitrates with tri-n-butyl phosphate in n-hexane
被引:7
|作者:
Wang, Zhuangfei
[1
]
Liu, Tingting
[2
]
He, Xihong
[1
]
Zhu, Liyang
[1
]
He, Hui
[1
]
机构:
[1] China Inst Atom Energy, Dept Radiochem, Beijing 102413, Peoples R China
[2] Harbin Engn Univ, Coll Nucl Sci & Technol, Harbin 150001, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Lanthanide nitrate;
n-Hexane;
Separation factor;
Competitive complexation;
SUPERCRITICAL-FLUID EXTRACTION;
URANIUM;
SEPARATION;
ACTINIDES;
RECOVERY;
CO2;
D O I:
10.1007/s10967-016-5027-7
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
Competitive complexation of solid lanthanide nitrates with tri-n-butyl phosphate (TBP) in n-hexane was studied by spectroscopic methods. For light lanthanides binary system (Nd-Pr), they complexed with TBP equally, leading to a low separation factor. However, distinct different behavior was observed for light-heavy lanthanides binary system (Nd-Ho). Heavy lanthanide Ho(NO3)(3)center dot 6H(2)O complexed preferentially with TBP, resulting in a much higher separation factor. The separation factor was low during H2O stripping of lanthanides from their complexes in n-hexane, even thought, the tendency of stripping more light lanthanide was also observed.
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页码:483 / 489
页数:7
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