Highly efficient extraction separation of uranium(VI) and thorium(IV) from nitric acid solution with di(1-methyl-heptyl) methyl phosphonate

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Highly efficient extraction separation of uranium(VI) and thorium(IV) from nitric acid solution with di(1-methyl-heptyl) methyl phosphonate
	Tan, ML; Huang, C; Ding, SD; Li, F; Li, QN; Zhang, L; Liu, CX; Li, SM
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2015
卷号	146 页码:192—198
关键词	MOLTEN-SALT REACTOR 3RD PHASE-FORMATION SOLVENT-EXTRACTION TRIALKYL PHOSPHATES 3RD-PHASE FORMATION BUTYL PHOSPHATE NUCLEAR-POWER FUEL-CYCLE ACTINIDES PERSPECTIVES
英文摘要	The extraction behaviors of U(VI) and Th(IV), as well as the extraction of HNO3 were investigated by using di(1-methyl-heptyl) methyl phosphonate (DMHMP) as an extractant and kerosene as a diluent. Effects of contact time, acidity, concentration of extractant and temperature on the distribution ratios of U(VI) and Th(IV) were evaluated. HNO3 was extracted as mono-solvated species. In the investigation of acidity range from 0.01 to 6.0 mol/L, the distribution ratios of U(VI) and Th(IV) increased at first with the rise of HNO3 concentration up to 3.0 mol/L and then decreased. DMHMP exhibited higher selectivity for U(VI) than for Th(IV) with the separation factor SFU/Th values of 25-120, whereas under the same conditions, tri-n-butyl-phosphate (TBP) only had SFU/Th, values of 1.4-26. Slope analyses showed that U(VI) and Th(IV) were extracted as di-solvated and tri-solvated species respectively. The thermodynamic parameters (Delta H, Delta S and Delta G) were presented and revealed that the extraction was exothermic. For the extraction of Th(VI) from various HNO3 by 30 vol.% DMHMP or TBP, the limiting organic concentration (LOC) was also given. FT-IR spectra indicated that it was P=O bond, not P-O bond that took part in the coordination with U(VI) and Th(IV). In addition, the solubility of DMHMP and TBP in various concentration HNO3 was determined using ICP-AES, and their thermal stability in air was also examined through TGA. DMHMP has much lower water solubility and higher thermal stability than TBP. (C) 2015 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/24472]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Tan, ML,Huang, C,Ding, SD,et al. Highly efficient extraction separation of uranium(VI) and thorium(IV) from nitric acid solution with di(1-methyl-heptyl) methyl phosphonate[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2015,146:192—198.
APA	Tan, ML.,Huang, C.,Ding, SD.,Li, F.,Li, QN.,...&Li, SM.(2015).Highly efficient extraction separation of uranium(VI) and thorium(IV) from nitric acid solution with di(1-methyl-heptyl) methyl phosphonate.SEPARATION AND PURIFICATION TECHNOLOGY,146,192—198.
MLA	Tan, ML,et al."Highly efficient extraction separation of uranium(VI) and thorium(IV) from nitric acid solution with di(1-methyl-heptyl) methyl phosphonate".SEPARATION AND PURIFICATION TECHNOLOGY 146(2015):192—198.