707阴离子交换树脂吸附铌的性能及动力学研究  

Study on Adsorption Properties and Kinetics of Niobium with 707 Anion Exchange Resin

作　　者：董彦杰[1] 盖轲[1] 

机构地区：[1]庆阳师范高等专科学校化学系,甘肃庆阳745000

出　　处：《湿法冶金》2003年第4期191-194,共4页Hydrometallurgy of China

摘　　要：研究了707阴离子交换树脂从草酸溶液中吸附铌 草酸配合物的特性。试验结果表明,在[(NH4)2C2O4]=0 20mol/L,[K2S2O7]=0 030mol/L,[Nb]=8 0×10-5mol/L,pH=2 0条件下,铌的吸附率有最大值,测得Freundlish常数K=1 69×103,吸附速率常数k25℃=1 73×10-4s-1,吸附活化能Ea=22 1kJ/mol,树脂的饱和容量为每g干树脂123 2mg。The adsorption properties of niobium oxalate complex in oxalic acid solution with 707 anion exchange resin have been investigated. The results show that the maximum adsorption amount occurs at [(NH4)2C2O4] =0.20 mol/L,[K2S2O8]=0.030 mol/L and pH=2.0. The Freundlish constant is 1.69×103 , the absorption rate constant is 1.73×10-4s-1(25 ℃) and the absorption activation energy Ea=22.1 kJ/mol as well as the saturate absorption capacity of resin is 123.2 mg per gram dryresin.

关 键 词：阴离子交换树脂 吸附性能 动力学 铌 铌-草酸配合物 

分 类 号：O647.3[理学—物理化学]