D－380大孔弱碱树脂吸附铼的传质动力学研究

Transfer kinetics study on D-380 macro-porous basic resin for rhenium

研究Ｄ－３８０大孔弱碱树脂从含铼的硫酸铵溶液中吸附铼的传质动力学．探讨了溶液铼浓度、树脂颗粒半径及温度对铼交换速度的影响；计算了有效扩散系数、表观活化能及活化熵等某些动力学及热力学参数．结果表明，Ｇ．Ｅ．Ｂｏｙｄ粒内扩散方程也适用于大孔树脂，粒内扩散是铼交换过程的唯一控制步骤．

The transfer kinetics of the absorption of rhenium from ammonium sulfate solutions by D-380 macro-porous basic resin have been studied. The dependence of the rate of exchange on the solution concentration of rhenium, the resin particle radius,and temperature are investigated. Some kinetic and thermodynamic parameters,Viz.effective diffusion coefficients, apparent activation energy and entropy are evaluated. The values of these constants indicate that the equation, developed by G. E. Boyd for the particlediffusion controlled kinetics is also valid for macro-porous resin, and the sole rate determing step is diffusion of rhenium ion through the resin particles.