Abstract:Self-prepared ethylene glycol methyl phosphonate oligomer (PEMP) was loaded on activated carbon (AC) by impregnation method to find a new enrichment and separation process of rare earth. Structure of PEMP/AC adsorbent before and after adsorbing Ce(Ⅲ) was characterized by Fourier Infrared Spectroscopy (FTIR). Effects of temperature, adsorption time, acidity of initial aqueous on adsorption performance of Ce(Ⅲ) were investigated. The results show that PEMP/AC has a better extraction effect at lower acidity conditions, and its adsorption process conforms to the Freundlich isotherm adsorption model. The optimal saturated adsorption capacity of PEMP/AC for Ce(Ⅲ) is 126.3 mg/g. It is confirmed that the G. E. Boyd liquid membrane diffusion mechanism controls adsorption process. Adsorption should be carried out at a lower temperature due to exothermic adsorption process. Dilute hydrochloric acid has obvious elution effect on PEMP/AC.