W-305C树指吸附钽的性能及动力学研究

Study on Properties and Kinetics of Adsorption Tantium with W-305C Ion Exchange Resin

研究了 W 3 0 5 C树脂从草酸溶液中吸附钽草酸配合物的性能。结果表明 ,在 [(NH4) C2 O4]=0 .1 5 mol/L,[K2 S2 O7]=0 .0 2 8mol/ L,[Ta]=8.0× 1 0 -5mol/ L,p H=2 .0条件下 ,钽的吸附率有最大值 ,Freundlish常数k=3 .48× 1 0 3 ,吸附常数 K2 98=1 .72× 1 0 -4,吸附活化能 Ea=2 5 .70 k J/ mol,树脂对钽的饱和容量为每克干树脂 1 5 3 .5 2 mg。

The adsorption properties of tantium oxalate complex in oxalic acid solution with W305C macro porous anion exchange resin have been investigated.The results show that the maximum adsorption amount of tantium occurs at [(NH 4) 2C 2O 4]=0.15mol/L,[K 2S 2O 8]=0.028mol/L and pH=2.0.The freundlish constant K is 3.48×10 3,the absorption rate constant k 25℃ is 1.72×10 -4 s -1 and the adsorption activity energy E a is 25.70 kJ/mol,the saturate adsorption capacity of tantium is 153.52 mg per gram dryresin.