同位素2026，Vol.39Issue(3)：217-230,14.DOI:10.7538/tws.2026.youxian.006
阳离子交换法分离147Pm与Nd的条件研究
Investigation on Separation of 147Pm from Nd by Cation Exchange Chromatography
成悦 1梁积新 1吴宇轩 1董昊林 1赵婧妍 1沈亦佳 1向学琴1
作者信息
- 1. 中国原子能科学研究院 核技术综合研究所,北京 102413
- 折叠
摘要
Abstract
Reactor irradiation of enriched 146Nd targets represents an important route for the production of 147Pm,where the major challenge lies in the efficient separation of trace 147Pm from a bulk Nd matrix.To establish a feasible separation process of 147Pm/Nd,the adsorption and separation behaviors of Nd and 147Pm on AG 50W×8 strong-acid cation-exchange resin were systematically investigated.Samarium was employed as a chemical surrogate for 147Pm during the optimization of process parameters.Batch adsorption results demonstrated that,in dilute hydrochloric acid media(0.000 1-0.1 mol/L HCl),Nd and 147Pm reached adsorption equilibrium within 10 min.The adsorption kinetics followed a pseudo-second-order model,and the adsorption isotherms were well described by the Langmuir model.The maximum adsorption capacities of the resin for Nd(Ⅲ)and Sm(Ⅲ)were determined to be 236.9 mg/g和 210.9 mg/g,respectively,from which the adsorption capacity of 147Pm can be reasonably inferred to lie between those of Nd and Sm.Based on the batch adsorption results,systematic column separation studies were carried out using Sm as a surrogate for 147Pm.The optimal chromatographic conditions were determined to be 0.4 mol/L α-hydroxyisobutyric acid(α-HIBA)as the eluent at pH 4.1,a flow rate of 1.0 BV/h,and a temperature of 75℃.Under these conditions,separation experiments using 147Pm as a tracer demonstrated that 147Pm was preferentially eluted prior to Nd,achieving a resolution of 1.21 and a recovery yield exceeding 88.1%.This study establishes a cation-exchange chromatographic process coupled with complexing elution for the separation of 147Pm from Nd,providing a practical experimental basis for the purification of 147Pm from irradiated 146Nd targets.关键词
147Pm/Nd分离/AG 50W×8树脂/阳离子交换法/α-羟基异丁酸(α-HIBA)Key words
147Pm/Nd separation/AG 50W×8 resin/ion exchange/α-hydroxyisobutyric acid(α-HIBA)分类
能源科技引用本文复制引用
成悦,梁积新,吴宇轩,董昊林,赵婧妍,沈亦佳,向学琴..阳离子交换法分离147Pm与Nd的条件研究[J].同位素,2026,39(3):217-230,14.
