阳离子交换树脂吸附虫草素的热力学分析

Thermodynamics Study on the Adsorption of Cordycepin by Cation-exchange Resin

研究了732阳离子交换树脂(001×7)对虫草素的吸附热力学特性。在所考察的温度和浓度范围内,001×7对虫草素吸附平衡数据符合Freundlich吸附等温方程,且为优惠型吸附。测试了虫草素在001×7上的吸附焓、自由能和吸附熵,结果表明吸附是吸热过程;并对虫草素的吸附行为作了合理解释,进一步通过虫草素的穿透曲线验证了虫草素吸附热力学结论。

Characteristics of cordycepin adsorption thermodynamics by 732 cation-exchange resin （001 ×7 ） were studied. The adsorption equilibrium data points were fitted the Freundlich isotherm equation and the adsorption is favourable type. The adsorption enthalpies, free energy changes and entropy changes of the cordycepin on 001 × 7 were also mensurated. The results indicated that the adsorption is a decalescence process. The breakthrough curve of cordycepin in dynamic experiments supports the above conclusion of thermodynamics.