Study on the diffusion kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregnated resin |
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Authors: | LIAO Chunfa Nie Huaping JIAO Yunfen LIANG Yong YANG Shaohua |
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Affiliation: | School of Materials and Chemistry,Jiangxi University of Science and Technology |
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Abstract: | 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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Keywords: | extraction chromatography impregnated resin kinetics heavy rare earth |
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