Dynamic and thermodynamic phenomenon of cation exchange membrane of copper ion
阳离子交换膜对Cu2+离子交换的动力学及热力学研究

Dynamic and thermodynamic phenomenon of the cation membrane exchanging of copper ion was studied.It was found that when the temperature was 25℃ and pH of the solution was 6,the exchange capacity of ion-exchange membrane for Cu2+ was 0.506 mmol/g.The ion exchange rate increased with increasing of the initial concentration of copper ion,or temperature and stirring speed.Ion exchange process has a good results fitted with a reaction rate equation.△G0<0 indicated that the ion exchange reaction can occur spontaneously.△H0m>0 indicated that exchange reaction was endothermic.△S0>0 indicates that exchange reaction was an entropy increased reaction.