Kinetics of Brilliant Green Adsorption onto Activated Carbon, Chitosan and Chitosan-Activated Carbon Blend

The kinetic adsorption of BG Dye onto chitosan-activated carbon blend was investigated using Batch adsorption process. The adsorbate used is the brilliant green dye (BGD), while Chitosan, Commercial Activated Carbon (CAC) and the blend were used as the adsorbents. A triplicate analysis was made at varying concentration of the Brilliant Green Dye solution (25, 50, 75, and 100mg/L) and at time intervals(10, 20, 30, 40, 50 and 60 minutes) respectively. The effect of temperature at298,308,318,328,338 and 348 K, were investigated.The datawere fitted into Pseudo-second order kinetic model, and their coefficient of correlation (R2) determined.R2values for AC and Ch were in conformity with the second order kinetics at all concentrations (0.93-0.99) for AC, (0.98-0.99) for Ch. ChGAC, R2 of 0.97 fitted at concentration of 100 mg/L. Elovich kinetic models were investigated and R2values determined.Thehigh R2 values for Elovich were only confirmed at 25mg/L,5 0mg/L and 75mg/L for AC and with less significant values at Ch and ChGAC, which show non-compatibility to this model, except at 100mg/L. Generally the adsorption of BG dye on AC, and Ch could compete significantly compared to ChGAC.