Adsorption of Ce(IV) in nitric acid medium by imidazolium anion exchange resin
来源期刊：Journal of Rare Earths2011年第10期
论文作者：祝丽荔 陈继
文章页码：969 - 973
摘 要：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.
祝丽荔1,2，陈继1
1. State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences2. Liming Research Institute of Chemical Industry
摘 要：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.
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