Sorption Behavior and Mechanism of D113 Resin for Erbium
The sorption behavior and mechanism of a novel macroporous weak acid resin(D113 resin) for Er(Ⅲ) were investigated. The optimal sorption condition of D113 resin for Er(Ⅲ) was pH6.42 in HAc-NaAc medium. The statically saturated sorption capacity was 272mg·g<-1> at 298K in HAc-NaAc medium. The Er(Ⅲ) adsorbed on D113 resin could be reductively eluted by the mixed solution of HCl and NaCl. The elution percentage could reach 100％. The resin could be regenerated and reused without apparent decrease of sorption capacity. The apparent sorption rate constant was k<,298>=1.98x10<-5>s<-1>. The apparent activation energy was 8.60kJ·mol<-1>. The sorption behavior of D113 resin for Er(Ⅲ) obeyed the Freundlich isotherm and Langmuir isotherm. The sorption parameters of thermodynamics were ΔH=44.0kJ·mol<-1>, ΔS=223J·mol<-1>·K<-1>, ΔG<,298K>=-22.3kJ·mol<-1>, respectively. The molar coordination ratio of the functional group of D113 resin to Er(Ⅲ) was 3:1. The sorption mechanism of D113 resin for Er(Ⅲ) was examined using chemical method and IR spectrometry.
D113 resin erbium sorption mechanism thermodynamics kinetics rare earths
Yao Caiping(姚彩萍)
Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310035, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
169-174
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）