Permeability coefficient model equations of the complex: Membrane-concentration boundary layers for ternary nonelectrolyte solutions

Abstract

The permeability coefficient model equations of the complex: membrane-concentrations boundary layers for ternary nonelectrolyte solutions are presented. The validity of this model for ternary solutions was verified using a diffusion cell with a horizontally mounted membrane. Concentration profiles obtained on the basis of computer analysis of interferometric pictures were subsequently used for the spatio-temporal structure determination of concentration boundary layers. We report experimental results of the concentration dependence of the concentration boundary layers thickness for steady states. The permeability coefficient of the complex: membrane-concentration boundary layers ( Ω k s i ) was calculated on the basis of experimentally determined diffusion permeability of the membrane ( ω k s ), thickness of concentration boundary layers ( δ s i ) and solute diffusion coefficient in the solvent ( D k s ). It was observed a good agreement between the experimental data of Ω k s i and the results from calculation on the basis of model equation of Ω k s i .