Dialysis is being considered to recover a product A with molecular weight 150 from a dilute aqueous stream. The principal contaminant is a polymer B with molecular weight 15,000. Predict the initial fluxes of A and B if the membrane has a porosity of 45 percent, a mean pore size of 0.05 μm, and a thickness of 30 μm, and the feed solution contains 1 percent A and 1 percent B. Neglect boundary layer resistances, and assume pure water on the product side.