LN树脂对溶液中钐和钆的静态吸附和色层柱分离  

Static Adsorption and Chromatographic Column Separation of Samarium and Gadolinium in Solution by LN Resin

作　　者：葛芮彤 李斌[1] 李峰峰[1] 徐纪塘 李俊乐 GE Ruitong;LI Bin;LI Fengfeng;XU Jitang;LI Junle(Institute of Radiochemistry,Chinese Academy of Atomic Energy Sciences,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《有色金属（冶炼部分）》2024年第6期78-84,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：联合基金资助项目(EE222512122030)。

摘　　要：探究LN树脂对Sm(Ⅲ)和Gd(Ⅲ)的吸附效果,考察了时间、酸度和温度对树脂吸附量的影响,对吸附过程的吸附动力学和吸附热力学进行了研究,并测定了相关热力学参数ΔH、ΔS以及ΔG。结果表明,LN树脂在298 K下对Sm(Ⅲ)和Gd(Ⅲ)的吸附可在2 min后达到平衡,酸度越小平衡吸附量越大,且随温度升高平衡吸附量也逐渐升高。使用LN树脂色层柱进行了钐和钆的分离试验,Sm(Ⅲ)在0.75 mol/L HNO_(3)酸度下洗脱,Gd(Ⅲ)在1.0 mol/L HNO_(3)酸度下洗脱,不同洗脱液流速对柱分离效果的影响结果表明,流速为0.53 mL/min时分离效果最好。The adsorption performance of LN resin for Sm(Ⅲ)and Gd(Ⅲ)were explored.The effects of time,acidity,and temperature on the resin adsorption capacity were investigated.The adsorption kinetics and thermodynamics of the adsorption process were studied.The thermodynamic parametersΔH,ΔS andΔG were measured.The results show that the adsorption of Sm(Ⅲ)and Gd(Ⅲ)on LN resin reach equilibrium after 2 minutes at 298 K.The lower the acidity,the greater the equilibrium adsorption capacity,and the equilibrium adsorption capacity rises gradually with the increase of temperature.The separation experiment of samarium and gadolinium was carried out using/LN resin chromatography column.Sm(Ⅲ)was eluted at an acidity of 0.75 mol/L HNO_(3),while Gd(Ⅲ)was eluted at an acidity of 1.0 mol/L HNO_(3).The test results of different elution flow rates on column separation efficiency show that the best separation effect is achieved at a flow rate of 0.53 mL/ min.

关 键 词：LN树脂 钐 钆 吸附 色层柱 

分 类 号：TF845[冶金工程—有色金属冶金]