Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid

	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)
刊名	RADIOCHIMICA ACTA
	2014
卷号	102 期号:1-2 页码:87-92
关键词	Uranium Solvent extraction Ionic liquid Dipicolinamide
英文摘要	Room-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.
学科主题	Chemistry; Nuclear Science & Technology
收录类别	SCI
WOS记录号	WOS:000331141200009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225329]
专题	高能物理研究所_院士高能物理研究所_多学科研究中心
推荐引用方式 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.