摘要
研究了D152树脂在NaAc-HAc缓冲体系中对Eu^3＋的吸附与解吸行为。结果表明：静态饱和吸附容量为340mg／g；用0．1～2．0mol／L HCl洗脱，洗脱率为92％以上；测得吸附热力学函数分别为：AH=14．3kJ／mol、△G298=-1．88kJ／mol、△S=54．3J／（mol·K）；等温吸附曲线遵守Freundlich关系式；表观活化能Ea=9．10kJ／mol，表观速率常数k298=1．54×10^-5s^-1。用化学和红外光谱的方法探讨了树脂对Eu^3＋的吸附机理。
The adsorption behavior of D152 resin for Eu^3＋ was investigated. Experimental results showed that statically saturated adsorption capacity is 340 mg/g resin. Eu^3＋ adsorbed on D152 can be eluted with 0. 1 - 2. 0 mol/L HCl. The elution percentages are over 92%. The thermodynamic adsorption parameters are △H = 14.3kJ/mol, △G298 = -1.88kJ/mol and △S = 54.3 J/（ mol · K）, respectively. The adsorption behavior of D152 for Eu^3＋ obeys the Freundlich isotherm. The apparent activation energy is Ea = 9. 10 kJ/ mol. The apparent adsorption rate constant is k298 = 1.54 × 10^-5 s^-1. The adsorption mechanism of resin for Eu^3＋ was examined in terms of chemical analyses and IR spectra.
出处
《矿物学报》
CAS
CSCD
北大核心
2008年第1期89-92,共4页
Acta Mineralogica Sinica
基金
浙江省教育厅资助项目(No20040551)
浙江省教育厅项目(No20031146)
关键词
D152树脂
吸附
机理
铕
D152 resin
sorption behavior
sorption mechanism
europium
