Transport properties in the nanofiltration of NaNO3–water solutions with a weak acid polyelectrolyte membrane

The nanofiltration of 0.02–1.0 mol/dm3 NaNO3 solutions at pH 4.0 and 8.0 using a dynamically-formed zirconium hydrous oxide-polyacrylate (FIP-ZPA) membrane has been investigated at 318 K. The practical transport coefficients for hydrodynamic permeability (Lp), reflection (σ) and solute permeability (ω), were calculated from the nanofiltration results using irreversible thermodynamic equations.