Abstract
Novel barium alginate membrane for applying to nanofiltration process was successfully prepared by the ion-exchange cross-linking between monovalent Na+ at carboxyl group of alginate and divalent Ba2+. Methyl Orange was permeated as a model component in order to determine the optimal agitation condition. Under sufficient agitation over 15 [s-1], it was found that the mass transfer resistance of laminar film can be ignored, and the overall mass transfer coefficient can be assumed to the membrane mass transfer coefficient for our experimental apparatus. The effective diffusion coefficient of model molecules was determined from mass balance equation. The noticeable dependency of effective diffusion coefficient in the barium alginate membrane on molecular weight of solutes was exerted since compact gel network consisting of barium ions and poly(guluronate) block.
