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Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
Sun, M; Yuan LY(袁立永); Yuan, LY; Tan, N; Zhao, YL; Chai, ZF; Shi, WQ;; Chai ZF(柴之芳); Shi WQ(石伟群); Zhao YL(赵宇亮)
2014
Source PublicationRADIOCHIMICA ACTA
ISSN0033-8230
Volume102Issue:1-2Pages:87-92
AbstractRoom-temperature ionic liquids (RTILs) have recently received increasing attention as solvent alternatives for possible application in spent fuel reprocessing, particularly in the extraction of metal ions from high-level radioactive aqueous waste, due to their unique physical and chemical properties. Herein, the solvent extraction of the uranyl ions (UO22+) was performed using N,N'-diethyl-N,N'-di(para)tolyl-dipicolinamide (Et((p))TDPA) as the extractant in a commonly used ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([C(4)mim][PF6]). The effects of vortexing time, phase ratio and the concentration dependence of Et-(p) TDPA, nitric acid and sodium nitrate on the extraction were studied in detail. The extraction mechanism was deduced based on the slope analysis and UV-vis measurement. The distribution ratio of U from 3 mol/L nitric acid by 0.3 mol/L EtTDPA/C-4 mim PF6 is found to be almost 100. Conventional log-log plot analysis of the extraction equilibrium data suggests that the ions are extracted as a complex in 2 : 3 ratio of UO22+ to extractant, and the extraction most likely occurs by a cation-exchange mode since the concentration of C(4)mim(+) in the aqueous phase increases linearly with the percent extraction of UO22+ evidenced by UV-vis measurement. This work promises to provide new efficient media based on RTILs for separation of uranium from the radioactive aqueous waste.
KeywordUranium Solvent extraction Ionic liquid Dipicolinamide
Subject AreaChemistry; Nuclear Science & Technology
DOI10.1515/ract-2014-2095
Indexed BySCI
Language英语
WOS IDWOS:000331141200009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/225329
Collection院士
多学科研究中心
Recommended Citation
GB/T 7714
Sun, M,Yuan LY,Yuan, LY,et al. Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid[J]. RADIOCHIMICA ACTA,2014,102(1-2):87-92.
APA Sun, M.,袁立永.,Yuan, LY.,Tan, N.,Zhao, YL.,...&赵宇亮.(2014).Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid.RADIOCHIMICA ACTA,102(1-2),87-92.
MLA Sun, M,et al."Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid".RADIOCHIMICA ACTA 102.1-2(2014):87-92.
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