Article ID Journal Published Year Pages File Type
581907 Journal of Hazardous Materials 2009 6 Pages PDF
Abstract
The investigation of adsorption of nitrate onto chitosan beads modified by cross-linking with epichlorohydrin (ECH) and surface conditioning with sodium bisulfate was performed. The results indicated that both cross-linking and conditioning increased adsorption capacity compared to normal chitosan beads. The maximum adsorption capacity was found at a cross-linking ratio of 0.4 and conditioning concentration of 0.1 mM NaHSO4. The maximum adsorption capacity was 104.0 mg g−1 for the conditioned cross-linked chitosan beads at pH 5, while it was 90.7 mg g−1 for normal chitosan beads. The Langmuir isotherm model fit the equilibrium data better than the Freundlich model. The mean adsorption energies obtained from the Dubinin-Radushkevich isotherm model for all adsorption systems were in the range of 9.55-9.71 kJ mol−1, indicating that physical electrostatic force was potentially involved in the adsorption process.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Health and Safety
Authors
, , , ,