ADSORPTION STUDIES OF SOME DYES ON ACACIA CONCINNA POWDER

Geetha K.S, Belagali S.L

Abstract: The low cost activated carbon from Acacia Concinna was processed by treating with 2% HCl and 2% NaOH. The treated Acacia Concinna (Shikakai powder) was then roasted to get activated carbon. The influence of parameters like pH, concentration, dose and contact time were studied on adsorption of activated carbon for Congo red, Rhodamine-B, Crysoidine, Bismark brown and Titan yellow. The adsorption capacity of activated carbon was found to be 97, 98, 95, 98 and 96% respectively at pH 2 and contact time 24-48 hrs for all the dyes. The effect of concentration indicated that, as concentration increases adsorption decreases, hence increase in dose amount increases the adsorption. The data obtained through batch adsorption study was applied for Langmuir, Freundlich and Dubinin-Radushkevich(D-R) isotherms. The curve was linear for all the three isotherms and correlation coefficient (R2 ) was 0.92, 0.970 and 0.977 respectively indicating that the developed model was favourable.

Keywords: Adsorption, Acacia Concinna, dyes, isotherms, XRD.

DOI: https://doi.org/10.15623/ijret.2015.0402028