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N-methylimidazolium functionalized anion exchange resin in NO3-form(RNO3) was prepared and used for adsorption of Ce(IV)in nitric acid medium.The adsorption amount increased with shaking time increasing and the adsorption equilibrium was obtained within 180min.Ce(IV) was partially reduced to Ce(III) and the reduction percent of Ce(IV) increased with shaking time increasing.But RNO3 was morestable than other resins due to the high resistance to oxidation.A little increase of adsorption amount was found with concentration of HNO3increasing.However,the reduction percent of Ce(IV) decreased with the increase of HNO3 concentration.The addition of NaNO3 decreasedthe adsorption amount of Ce(IV) on RNO3 due to the competitive anion exchange reaction.Ce(IV) was adsorbed on RNO3 in the form ofCe(IV) anion nitrato-complex.RNO3 and Ce(IV)-loaded RNO3 were characterized by fourier transform infrared(FT-IR) and thermogravimeric analysis(TGA).Ce(IV) could be easily separated from RE(III) solution by RNO3.
N-methylimidazolium functionalized anion exchange resin in NO3-form (RNO3) was prepared and used for adsorption of Ce (IV) in nitric acid medium. The deposition amount increased with shaking time increasing and the adsorption equilibrium was obtained within 180 min. ) was partially reduced to Ce (III) and the reduction percent of Ce (IV) increased with shaking time increasing. But RNO3 was more resistant than other resins due to the high resistance to oxidation. A little increase of adsorption amount was found with concentration of The reduction of Ce (IV) decreased with the increase of HNO3 concentration. The addition of NaNO3 decreased the amount of Ce (IV) on RNO3 due to the competitive anion exchange reaction. Ce (IV) was adsorbed on RNO3 in the form of Ce (IV) anion nitrato-complex. RNO3 and Ce (IV) -loaded RNO3 were characterized by fourier transform infrared (FT-IR) and thermogravimeric analysis (TGA) III) solution by RNO3.