In this study, the adsorption of Reactive Orange 16 (RO16) onto cross-linked chitosan/oil palm ash composite beads (CC/OPA) was studied in batch mode operation with respect to temperature and initial dye concentration. The adsorption of RO16 onto cross-linked chitosan/oil palm ash composite beads increased with increasing temperature (30-50°C) and initial dye concentration (50-500 mg L-1). The Langmuir and Freundlich isotherms models were used to describe the isotherm data; of which the Freundlich model described the isotherm data with high correlation coefficients. The monolayer coverage capacities of cross-linked chitosan/oil palm ash composite beads of RO16 dye was obtained 303.1, 434.8 and 588.2 mg g-1 at temperature 30, 40 and 50°C, respectively. It was observed that the reactive orange 16 dye adsorption capacity of cross-linked chitosan/oil palm ash composite beads increased in the order 30>40>50°C. The pseudo-first-order and pseudo-second-order were applied to the experimental data and it was found that results of correlation coefficients, the adsorption kinetics obey a pseudo-first-order.
H. Masitah, H.H. Bassim, A.A. Latif, M. Zulfakar, I. Naimah and M.Z.M. Salwa, 2011. Low Cost Removal of Reactive Orange 16 Dye using Cross-linked Chitosan/oil Palm Ash Composite Beads. Journal of Applied Sciences, 11: 2292-2298.