Sorption Behaviour and Mechanism of Lanthanum (Ⅲ) on HD-2 Resin  

作　　者：熊春华 姚彩萍 

机构地区：[1]Department of Chemistry, Zhejiang Gongshang University, Hangzhou 310035, China

出　　处：《Journal of Rare Earths》2005年第S1期101-104,共4页稀土学报（英文版）

基　　金：ProjectsupportedbyInstrumentalAnalysisFoundationofZhejiangProvince(04094)andLishuiScienceandTechnologyBureau(200420)

摘　　要：La(Ⅲ) was quantitatively adsorbed by macroporous weak acid resin (HD-2) in the medium of pH=6.16. The statically saturated sorption capacity is 231 mg·g -1(resin). 3.0 mol·L -1 HCl can be used as an eluant. The elution percentage is 100%. The sorption rate constant is k_ 298=3.04×10 -5 s -1. The apparent sorption activation energy of HD-2 for La(Ⅲ) is 31.2 kJ·mol -1. The sorption behavior of HD-2 for La(Ⅲ) obeys the Freundlich isotherm. The adsorption parameters of thermodynamic are ΔH=9.56 kJ·mol -1, ΔS=35.7 J·mol -1·K -1, ΔG=-1.08 kJ·mol -1, respectively.La(Ⅲ) was quantitatively adsorbed by macroporous weak acid resin (HD-2) in the medium of pH=6.16. The statically saturated sorption capacity is 231 mg·g -1(resin). 3.0 mol·L -1 HCl can be used as an eluant. The elution percentage is 100%. The sorption rate constant is k_ 298=3.04×10 -5 s -1. The apparent sorption activation energy of HD-2 for La(Ⅲ) is 31.2 kJ·mol -1. The sorption behavior of HD-2 for La(Ⅲ) obeys the Freundlich isotherm. The adsorption parameters of thermodynamic are ΔH=9.56 kJ·mol -1, ΔS=35.7 J·mol -1·K -1, ΔG=-1.08 kJ·mol -1, respectively.

关 键 词：macroporous weak acid (HD-2) resin kinetics SORPTION rare earths 

分 类 号：O647.31[理学—物理化学]