SOLUTE-SOLUTE SEPARATIONS OF BINARY-SOLUTE SOLUTIONS USING FORMED-IN-PLACE MEMBRANES

The nanofiltration of binary-solute solutions containing 0.02-0.50 M l actose and 0.02-1.0 M NaCl with a dynamically formed Zr(IV) hydrous ox ide-polyacrylate membrane has been investigated. The dependence of the selectivity defined as the ratio of electrolyte passage to nonelectro lyte passage on the concentrations of the components was determined. S electivity increased with increasing concentration of both solutes. In creasing electrolyte concentration increased the passage of the electr olyte while having little effect on the passage of the nonelectrolyte, and increasing nonelectrolyte concentration increased the passage of the electrolyte but decreased the passage of the nonelectrolyte.