BK110树脂对镝的吸附及机理  

Sorption Behavior and Mechanism of BK110 Resin for Dy(Ⅲ)

作　　者：王惠君[1] 高鹏[1] 

机构地区：[1]浙江海洋学院海洋科技学院,浙江舟山316004

出　　处：《稀土》2007年第3期64-67,共4页Chinese Rare Earths

基　　金：浙江省教育厅资助项目(20040551);舟山市科技局计划项目资助(04114)

摘　　要：系统研究了镝离子在BK110树脂上的吸附行为,实验表明,在pH=5.70的HAc-NaAc介质中吸附最佳。测得静态饱和吸附容量为256mg·g^-1（树脂）;用0.5mol·L^-1-2.0mol·L^-1HCl可定量洗脱;表观速率常数k298=2.32×10^-5s^-1;表观活化能Ea=18.2kJ·mol^-1;等温吸附服从Freundlich经验式;吸附热力学参数△H=13.8kJ·mol^-1,△S=49.9J·mol^-1·K^-1,△G=-1.04kJ·mol^-1;用化学和红外光谱等方法讨论了吸附机理。The sorption behavior of BK110 resin for Dy（Ⅲ） was investigated. BK110 resin has a good sorption ability for Dy（Ⅲ） in the HAc-NaAc medium at pH=5.70. The statically saturated sorption capacity is 256mg·g^-1 resin . Dy（Ⅲ） adsorbed on BK110 resin can be eluted quantitatively by using 0. 5-2. 0 mol·L^-1 hydrochloric acid as an eluent. The apparent rate constant is k298=2.32×10^-5s^-1. The apparent activation energy of BK110 for Dy （Ⅲ） is 18.2 kJ·mol^-1. The sorption behavior of BK110 for Dy（Ⅲ） obeys the Freundlich isotherm. The sorption parameters of thermodynamic are △H= 13.8 kJ·mol^-1 ,△S=49.9J·mol^-1·K^-1,△G=-1.04kJ·mol^-1. The sorption mechanism of BK110 resin for Dy^3＋ was confirmed by chemical analysis and IR spectra.

关 键 词：BK110树脂 吸附 机理 镝 

分 类 号：O614.33[理学—无机化学]