摘要
用树脂吸附的方法系统地研究了树脂D155对铒(Ⅲ)的吸附行为,测定了不同介质pH、温度、吸附时间等因素对吸附的影响。测得该阳离子交换树脂在HAc-NaAc体系pH=5.7时吸附Er3+的性能最佳,其静态最大吸附量为280mg.g-1;测得其表观吸附速率常数k298=2.58×10-5s-1;测得吸附热力学参数分别为:ΔH=13.05kJ.mol-1,ΔS=50.52J.mol-1.K-1,ΔG=-2.00kJ.mol-1,该树脂对Er3+的表观吸附活化能Ea=10.42kJ.mol-1;树脂吸附铒(Ⅲ)符合Freundlich经验式。并对负载树脂解吸进行探讨。
This article focuses on the research of the effect of resin adsorption, through tile factors such as pH of medium, temperature,adsorption time and resin concentration etc. Experirnental results show that the best medium pH of sorption of Er^3＋ by D155 resin is 5.7 in the HAc- NaAc medium. The static adsorption capacity of Er^3＋ by D155 resin is 280mg·g^-1. The adsorption rate constant is 2.58×10^-5s^-1. The adsorption thermodynamic parameters are △H= 13.05kJ·mol^-1 ,GS= 50252J·mol^-1 ·K^-1 ,△G= -2. 0kJ· mol^-1. And the apparent activity energy is 10.42kJ·mol^-1. The adsorption behavior of Er^3＋ by D155 resin obeys the Freundlich isotherm.The desorption process of Er^3＋ form the pregnant resin is also researched.
出处
《稀土》
EI
CAS
CSCD
北大核心
2008年第4期26-29,共4页
Chinese Rare Earths
基金
浙江省教育厅资助项目(20040551)
浙江省教育厅项目(20031146)
