Thermodynamics of overequivalent sorption in multicomponent ion-exchange systems with amino acids

Abstract

Ion exchange and overoverequivalent sorption in the AV-17-2P-OH-Cl–tryptophan anion-exchange system are studied. It is established that the ion exchange of tryptophan against the background of the exchange of mineral ions (ОН^––Сl^–) is better accomplished from alkaline solutions on the Cl^– form of the adsorbent and the overequivalent adsorption of an amino acid from a salt-containing solution on the OH^– form of the anion exchange resin. The results from calculating and analyzing the thermodynamic constants of ion exchange and non-exchange absorption are given.