DETERMINATION OF THE DEPENDENCES OF KINETIC COEFFICIENTS OF THE PROCESS OF ELECTROMEMBRANE PURIFICATION OF TECHNOLOGICAL SOLUTIONS FROM IRON AND NICKEL CATIONS

Abstract

In this paper, the kinetic coefficients of the electromembrane method for cleaning aqueous solutions from toxic compounds are investigated. The objects of study are process solutions containing iron and nickel cations and semipermeable membranes of cellulose acetate and polymer types with different selectively permeable characteristics. A series of experiments were conducted to determine the electrosorption and electrodiffusion characteristics of the MGA-95P, OPM-K and OPMN-K membranes depending on the operating parameters of the electromembrane process. As a result of the analysis of experimental dependencies, the degree of influence of transmembrane parameters on the values ​​of the equilibrium distribution coefficients and electrodiffusion permeability of cellulose acetate and polyamide membranes was substantiated. Criterial expressions are presented for theoretical calculation of the values ​​of the equilibrium distribution coefficients and electrodiffusion permeability depending on the membrane type, current density, concentration and temperature of the process solution. Numerical values ​​of empirical coefficients have been determined, allowing calculation and prediction of the values ​​of coefficients that can be used in engineering calculations of electromembrane installations used in technological schemes of treatment plants.