Highly efficient extraction separation of uranium(VI) and thorium(IV) from nitric acid solution with di(1-methyl-heptyl) methyl phosphonate
文献类型：期刊论文
| 作者 | Tan, ML; Huang, C; Ding, SD; Li, F; Li, QN; Zhang, L; Liu, CX; Li, SM |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 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 |
| 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. |
入库方式： OAI收割
来源：上海应用物理研究所
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