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Electrochemical separation of uranium from lanthanide (La, Eu, Gd) fluorides in molten LiCl-KCl
Zhu, TJ; Huang, W; Gong, Y
2020
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume235Pages:-
Subtype期刊论文
AbstractThe electrochemical behaviors of a series of lanthanide fluorides in molten LiCl-KCl were investigated, and the results on the separation of uranium from molten LiCl-KCl-UF4-LaF3-GdF3-EuF3 by electrolysis were provided. On the basis of the cyclic voltammetry and square wave voltammetry measurements, LaF3 and GdF3 undergo a three-electron reduction to metal in molten LiCl-KCl while the fluoride of europium (III) can only be reduced to europium (II) via single electron transfer. Compared with the relatively simple electrochemical behaviors of individual LaF3, GdF3 or EuF3 in molten LiCl-KCl, the cyclic voltammograms of LaF3, UF4, GdF3 and EuF3 coexisting in the LiCl-KCl melt are complicated by the presence of F ions which cause the appearance of new peaks especially in the oxidation processes. Potentiostatic electrolysis of the LiCl-KCl-UF4-LaF3-GdF3-EuF3 melt using the tungsten sheet electrode resulted in the formation of metallic deposits that are composed of uranium as well as small amount of UO2 according to the X-ray diffraction and scanning electron microscope analysis, suggesting that uranium can be successfully separated from lanthanide fluorides in the LiCl-KCl molten salt.
KeywordLIF-NAF-KF BEHAVIOR ACTINIDES ELECTRODE THORIUM GADOLINIUM SPECIATION TH(IV) GDCL3 UCL3
DOI10.1016/j.seppur.2019.116227
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32840
Collection中科院上海应用物理研究所2011-2020年
AffiliationChinese Acad Sci, Shanghai Inst Appl Phys, Dept Radiochem, Shanghai 201800, Peoples R China
Recommended Citation
GB/T 7714
Zhu, TJ,Huang, W,Gong, Y. Electrochemical separation of uranium from lanthanide (La, Eu, Gd) fluorides in molten LiCl-KCl[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,235:-.
APA Zhu, TJ,Huang, W,&Gong, Y.(2020).Electrochemical separation of uranium from lanthanide (La, Eu, Gd) fluorides in molten LiCl-KCl.SEPARATION AND PURIFICATION TECHNOLOGY,235,-.
MLA Zhu, TJ,et al."Electrochemical separation of uranium from lanthanide (La, Eu, Gd) fluorides in molten LiCl-KCl".SEPARATION AND PURIFICATION TECHNOLOGY 235(2020):-.
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