Abstract
We measured the equilibrium isotherm for adsorption of organic acids (acetic acid, malic acid, and citric acid) on crosslinked chitosan fiber at 298K by the batch method. The adsorption of organic acids on a crosslinked chitosan fiber, which was fabricated from chitin, appeared technically feasible. The data of the equilibrium isotherms for adsorption of organic acids were not affected by the initial concentration of the solution, and were correlated well by the Langmuir equation. Adsorption of organic acids on crosslinked chitosan would be caused by the acid/ base neutralization reaction between the carboxylic group of organic acid and the fixed amino group of the crosslinked chitosan. Saturation capacity of the equilibrium isotherm for adsorption of each organic acid decreases as the molecular weight of organic acid increases. Equilibrium amounts for adsorption of organic acids on crosslinked chitosan fiber were affected by the concentration of salt (NaCl) in the liquid phase.
