Study on the diffusion kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregnated resin
来源期刊：Journal of Rare Earths2010年第S1期
论文作者：廖春发 聂华平 焦云芬 梁勇 杨少华
文章页码：120 - 124
摘 要：Kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregn ated resin was studied. The influences of temperature,concentration,granularit y of resin on the exchange degree were investigated by the limited bath method. The result showed that the controlling factor of RE3+/H+ diffusion on Cyanex272-P507 extraction resin was particles diffusion. The process of diffuse kinetics f itted well with the expression developed by Body model. The apparent activation energy was determined as 23.20 kJ/mol. The reaction order was 0.452. In addition,the constant of particles diffusion（D0） was 1.352×10-8 m2/S and the entropy of diffusion was-47.055 J/（mol·K）.
廖春发，聂华平，焦云芬，梁勇，杨少华
School of Materials and Chemistry,Jiangxi University of Science and Technology
摘 要：Kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregn ated resin was studied. The influences of temperature,concentration,granularit y of resin on the exchange degree were investigated by the limited bath method. The result showed that the controlling factor of RE3+/H+ diffusion on Cyanex272-P507 extraction resin was particles diffusion. The process of diffuse kinetics f itted well with the expression developed by Body model. The apparent activation energy was determined as 23.20 kJ/mol. The reaction order was 0.452. In addition,the constant of particles diffusion（D0） was 1.352×10-8 m2/S and the entropy of diffusion was-47.055 J/（mol·K）.
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