ANION-EXCHANGE IN AMBERLITE IRA-400 AND AMBERLITE IRA-410 ION-EXCHANGE RESINS

Equilibrium for the binary exchange of anions on Amberlite IRA-400 and Amberlite IRA-410 was measured. Standard methods were used to determine operating characteristics of both resins. Equilibrium data were obtained by the batch method. The fitting of binary ion exchange isotherm equations is an important aspect of data analysis. The Langmuir, Freundlich, Slips, and Koble-Corrigan isotherms were transformed to a linear form and their adjustable parameters estimated by linear regression. The Langmuir isotherm is the most suitable for both correlation of equilibrium data and prediction and interpretation of breakthrough curves.