研究了4A分子筛吸附Sr2+的吸附特性,从动力学和热力学角度探讨了Sr2+的吸附机理.实验结果表明,Sr2+在4A分子筛中的吸附包括快速吸附和稳定平衡两个阶段,4 h可达到平衡,吸附率为99.32%,饱和吸附量为74.96 mg/g,吸附过程符合伪二阶动力学方程,吸附等温线可用Langmuir吸附等温式进行描述,吸附过程以阳离子交换吸附为主.%Characteristics of kinetics and thermodynamics of Sr2+ absorbed on 4A molecule sieve were studied. The results indicated that the sorption process was divided into fast and slow sorption stages, the adsorption equilibrium time was nearly 4 h and the adsorption rate was 99.32%, and the saturated adsorption capacity was 74.96 mg/g. Pseudo-second order kinetic model was able to describe the sorption process and Langmuir model fitted the sorption isotherm best, which demonstrated that the way of sorption was mainly cation exchange.
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