摘要
研究介质pH、温度、吸附时间、树脂量等因素对110^＊树脂吸附稀土金属铒离子的影响及吸附行为与机理。结果表明，110^＊树脂对铒（Ⅲ）的吸附在pH=5．70时最佳，静态饱和吸附容量为317mg·g^-1（干树脂），用1．0-2．0mol／L的HCl作解吸剂可定量解吸。吸附过程服从Freundlich经验式，b值在2～10之间。吸附反应热力学函数△H=16．51kJ·mol^-1，△S=58．71·mol^=1·K^-1。△G=-1．00kJ·mol^-1。表观吸附活化能Ea=31．3kJ·mol^-1,表观吸附速率常数k298=1．84×10^-5s^-1。树脂上C-OH中的H和C=O中的0与Er^3＋发生配位。
The effect of the factors such as medium pH, temperature, absorption time, resin dosage etc. on absorption of rare-earth element ion Er^3＋ with 110^＊ resin and the adsorption behavior and mechanism are investigated. The results show that the optimal medium pH is 5.70 for Er^3＋ adsorption with 110^＊ resin and the static adsorption capacity is 317mg/g-dry resin, and the Er^3＋ on 110^＊ loaded resin can be quantitatively eluted by using 1.0- 2.0 mol·L^-1 hydrochloric acid as an eluent. The adsorption process is consonant with the Freundlich isotherm equation with b between 2- 10. The thermodynamic parameters of adsorption reaction are ΔH= 16.5kJ·mol^-1, AS = 58.7J·mol^-1·K^-1,ΔG = - 1.00 kJ·mol^-1. The apparent activation energy is Eα=31.3kJ·mol^-1 and the reaction rate constant is k298 = 1.84×10^-5s^-1. The atom H in C- OH and atom O in C= O on 110^＊ resin interact with Er^3＋ to form the complex.
出处
《有色金属》
CSCD
北大核心
2006年第3期59-61,共3页
Nonferrous Metals
基金
浙江省教育厅科研资助项目(20040551)
舟山市科技局计划项目(04114)
