Adsorption and desorption behavior of Yb （III） by SQD-85 resin was investigated by various chemical methods and IR spectrometry. The adsorption capacity of SQD-85 resin for Yb （III） was studied as a function of so...Adsorption and desorption behavior of Yb （III） by SQD-85 resin was investigated by various chemical methods and IR spectrometry. The adsorption capacity of SQD-85 resin for Yb （III） was studied as a function of solution pH, initial concentration of Yb（III）, temperature and contact time. The optimal pH for the adsorption was 5.50 in the HAc-NaAc system, and the maximum adsorption capacity was estimated to be 347.6 mg/g at 308 K. The isotherms adsorption data fit well with Langmuir model. The adsorption kinetics data are in agreement with pseudo-second-order model. Thermodynamic parameters indicate that Yb （III） adsorption by SQD-85 resin is endothermic and spontaneous in nature. Thomas model is reasonably accurate in predicting experimental column results. The dynamic desorption rate of Yb（III） can increase to 97.3% when the elution agent is 1.0 mol/L HCl. These results suggest that Yb（III） in aqueous solution can be removed and recovered by SQD-85 resin efficiently.展开更多
基金Project (2011007) supported by Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-tech University, ChinaProject (2010C32085) supported by Science and Technology Department of Zhejiang Province, China
文摘Adsorption and desorption behavior of Yb （III） by SQD-85 resin was investigated by various chemical methods and IR spectrometry. The adsorption capacity of SQD-85 resin for Yb （III） was studied as a function of solution pH, initial concentration of Yb（III）, temperature and contact time. The optimal pH for the adsorption was 5.50 in the HAc-NaAc system, and the maximum adsorption capacity was estimated to be 347.6 mg/g at 308 K. The isotherms adsorption data fit well with Langmuir model. The adsorption kinetics data are in agreement with pseudo-second-order model. Thermodynamic parameters indicate that Yb （III） adsorption by SQD-85 resin is endothermic and spontaneous in nature. Thomas model is reasonably accurate in predicting experimental column results. The dynamic desorption rate of Yb（III） can increase to 97.3% when the elution agent is 1.0 mol/L HCl. These results suggest that Yb（III） in aqueous solution can be removed and recovered by SQD-85 resin efficiently.
