Abstract: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 parameters ?H,?S and ?G 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 HNO3, while Gd(Ⅲ) was eluted at an acidity of 1.0 mol/L HNO3. 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.