Abstract
Cross -linked beads of activated oil palm ash zeolite/chitosan (Z-AC/C) composite were prepared through the hydrothermal treatment of NaOH activated oil palm ash followed by beading with chitosan. The effects of initial dye concentration (50-400 mg/L), temperature (30 degrees C-50 degrees C) and pH (3-13) on batch adsorption of methylene blue (MB) and acid blue 29 (AB29) were studied. Adsorption of both dyes was better described by Pseudo-second-order kinetics and Freundlich isotherm model. The maximum adsorption capacities of Z-AC/C were 151.51,169.49, and 199.20 mg/g for MB and 212.76, 238.09, and 270.27 mg/g for AB29 at 30 degrees C, 40 degrees C, and 50 degrees C, respectively. (C) 2016 Elsevier B.V. All rights reserved.