氨基膦酸树脂对钕(Ⅲ)的吸附性能  

SORPTION OF AMBVOMETHYLENE PHOSPHONIC ACID RESIN FOR Nd(Ⅲ)

作　　者：洪庆红[1] 赵国良[2] 李锦英[2] 陈娟娟[2] 宋洁[2] 

机构地区：[1]金华职业技术学院生物工程学院,金华321000 [2]浙江师范大学生命与环境科学学院,金华321004

出　　处：《化学分析计量》2003年第4期21-23,共3页Chemical Analysis And Meterage

摘　　要：研究了氨基膦酸树脂对钕(Ⅲ)的吸附行为。当pH=5.70时,氨基膦酸树脂对钕(Ⅲ)的静态饱和吸附容量为199.74 mg/g,用1moL/L HCl溶液可以定量洗脱,当T=298 K时,表观吸附速率常数为1.68×10^(-4)s^(-1),吸附热力学参数△H=60.68 kJ/mol,△G=-14.91 kJ/mol,△S=253.65 J/(mol·K),等温吸附服从Freundlich曲线,氨基膦酸树脂功能基与钕(Ⅲ)的配位比为2:1。用红外光谱探讨了氨基膦酸树脂与钕(Ⅲ)的成键情况。The sorption behavior of aminomethylene phosphonic acid resin (APAR) for Nd (Ⅲ) was studied. Experimental results showed that the statically saturated sorption capacity for Nd(Ⅲ) is 199.74 mg/g. Nd(Ⅲ) adsorbed on APAR can be eluted with 1 mol/L HCl solution, elution percentage is 95. 3%. The apparent sorption rate constant (T= 298 K) is 1.68 ×10-4 s-1 , the sorption behavior of APAR for Nd(Ⅲ) obeys the Freundlich isotherm. The themo parameters △H, △G and △S obtained in the experiment is 60.68 kJ/mol,-14. 91 kJ/mol, 253. 65 J/( mol·K) , respectively. The sorption mechanism of APAR for Nd(Ⅲ) was examined by IR spectrometry

关 键 词：氨基膦酸树脂 钕(Ⅲ) 吸附性能 湿法治金 配位比 吸附速率 

分 类 号：TF125.24[冶金工程—粉末冶金] TF111.3[冶金工程—冶金物理化学]