Breakthrough Curve for Adsorption of Acid Dye on Crosslinked Chitosan Fiber
Review articleOpen access

AbstractThe recovery of univalent anionic dye by adsorption on cross-linked chitosan fiber, which we have developed, appeared feasible technically. Equilibrium isotherms for adsorption of Acid Orange II (acid dye) on cross-linked chitosan fibers were correlated by B.E.T. equation for finite number of layers at pH=6.9 and were almost rectangular at pH≤4. The saturation capacities of the dye adsorbed on ChF-A and ChF-B at pH≤4 were 2 and 1.6 times larger than activated carbon fiber, respectively. When pH≤4, breakthrough curve was independent of pH of the solution. The experimental breakthrough curves for pH≤4 were correlated well by the analytical solution for rectangular isotherm system.

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