PRESSURE-DRIVEN TRANSPORT OF TERNARY ELECTROLYTE-SOLUTIONS WITH A COMMON COION THROUGH CHARGED MEMBRANES - NUMERICAL-ANALYSIS

Pressure-driven transport of ternary electrolyte solutions with a comm on colon through charged membranes has been studied numerically for th e homogeneous membrane model. Considerable changes in mixture composit ion have been predicted. The principal features of separation phenomen on are an increase in selectivity with decreasing feed ionic strength and mole fraction of more mobile counterions, though in the case of mu ltiple-charged counterions with a lower mobility, opposite trends and dependencies with extrema also occur. It has been shown that adding el ectrolytes with less mobile counterions may improve the rejection of a starting electrolyte. The numerical analysis is in agreement with ava ilable analytical solutions and experimental data.