Extraction kinetics of uranium(VI) and thorium(IV) with di(1-methyl-heptyl)methyl phosphonate from nitric acid medium using a Lewis cell
文献类型：期刊论文
| 作者 | Song, LJ; Liu, Y; Ding, SD; Tan, ML; Li, QN; Zhang, L; Liu, CX |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 217期号:-页码:258—264 |
| 关键词 | MASS-TRANSFER KINETICS CONSTANT INTERFACIAL CELL REACTIVE EXTRACTION SOLVENT-EXTRACTION ORGANIC-PHASE LAMINAR-FLOW SEPARATION EQUILIBRIUM NITRATE NEODYMIUM(III) |
| ISSN号 | 1383-5866 |
| DOI | 10.1016/j.seppur.2019.02.020 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The extraction kinetics of uranium(VI) and thorium(IV) with di(1-methyl-heptyl)methyl phosphonate (DMHMP) dissolved in kerosene were investigated from HNO3 media. Experiments were performed in a constant interfacial area stirred Lewis cell. The results with the influence of stirring speed, specific interfacial area, and temperature indicated that the extraction process was governed by diffusion in the bulk phase or by chemical reaction at the liquid-liquid interface at the stirring speed below or above 140 rpm, respectively. The activation energies for the reactions were calculated as 28.5 kJ.mol(-1) and 26.8 kJ.mol(-1) for U(VI) and Th(IV), respectively. Meanwhile, the obtained thermodynamic parameters (Delta H, Delta S and Delta G) revealed that the extraction of both U(VI) and Th(IV) was an endothermic and non-spontaneous process and the structure of the extracted species was more ordered than that of the extractant itself. Furthermore, the influences of initial concentrations of HNO3, DMHMP and metal ions on the extraction rates were also examined. Based on the reaction orders with respect to the reactants, the rate equations and the extraction mechanism for U(VI) and Th(IV) were also presented. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31622]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Sichuan Univ, Coll Chem, Chengdu 610064, Sichuan, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Song, LJ,Liu, Y,Ding, SD,et al. Extraction kinetics of uranium(VI) and thorium(IV) with di(1-methyl-heptyl)methyl phosphonate from nitric acid medium using a Lewis cell[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2019,217(-):258—264. |
| APA | Song, LJ.,Liu, Y.,Ding, SD.,Tan, ML.,Li, QN.,...&Liu, CX.(2019).Extraction kinetics of uranium(VI) and thorium(IV) with di(1-methyl-heptyl)methyl phosphonate from nitric acid medium using a Lewis cell.SEPARATION AND PURIFICATION TECHNOLOGY,217(-),258—264. |
| MLA | Song, LJ,et al."Extraction kinetics of uranium(VI) and thorium(IV) with di(1-methyl-heptyl)methyl phosphonate from nitric acid medium using a Lewis cell".SEPARATION AND PURIFICATION TECHNOLOGY 217.-(2019):258—264. |
入库方式： OAI收割
来源：上海应用物理研究所
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