Interactions of metal ions with chitosan-based sorbents: a review

Application of chitosan and its derivatives as adsorbents for dye removal from water and wastewater: a review.

Adsorption behavior of reactive dye in aqueous solution on chemical cross-linked chitosan beads.

Chitin is the world's second most abundant naturally occurring polysaccharide. Much of this is disposed of as waste from seafood crustacean, mainly in shrimps, prawns, crabs, and lobsters, where it occurs as a significant component in the shells/exoskeletons of crustacea. Due to its widespread abundance, its chemical and physical versatility, and the problems of its disposal as a waste material, a wide range of value-added applications of chitin and chitosan is being initiated, investigated, and developed. The widely ranging value-added applications of chitin and chitosan are presented in this review. Chitin and its derivative, chitosan, both highly stable and difficult to degrade materials, can be obtained as 10–20% w/w from the waste seafood shells by suitable chemical processing. One of the significant developments in the new range of applications is the study of the ability of chitosan, as a potentially major environmental treatment material, to remove metal ions from wastewaters. Chitosan is the deac...

Application of Chitosan for the Removal of Metals From Wastewaters by Adsorption—Mechanisms and Models Review

Adsorption of anionic dyes in acid solutions using chemically cross-linked chitosan beads

Adsorption of acid dye on cross-linked chitosan fibers: Equilibria

The 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.

Akihide Okamoto

Papers

Adsorption of acid dye on cross-linked chitosan fibers: Equilibria

Breakthrough Curve for Adsorption of Acid Dye on Crosslinked Chitosan Fiber