EQUILIBRIUM AND KINETICS OF DISPERSE DYE ADSORPTION ON ACTIVATED CARBON PREPARED FROM RATTAN SAWDUST BY CHEMICAL ACTIVATION

The liquid-phase adsorption of C.I. Disperse Orange 30 (DO30) onto activated carbon prepared from rattan sawdust by chemical activation with H3PO4. The rattan sawdust was carbonized at 500oC, 2h and impregnated ratio weight with H3PO4 at 1:4.5. The effects of various parameters such as contact time, initial DO30 concentration and pH were investigated at temperature 30±1oC. Langmuir, Freundlich, Temkin and DubininRadushkevich isotherm models were used to illustrate the experimental isotherms and isotherms constants. The equilibrium data were best represented by Langmuir isotherm model, showing maximum monolayer adsorption capacity of 89.29 mg/g. The rates of adsorption were found to obey the rules of pseudo-second order model with good correlations. Rattan sawdust-based activated carbon (RSAC) was shown to be a promising material for adsorption of DO30 from aqueous solutions