Kinetic Modeling of Adsorption of Remazol Black 5 Dye Using a Low Cost Activated Carbon Obtained from Bauhenia Racemosa Seed Pod Carbon

Abstract

Adsorption process has been found to be one of the best treatment methods for the removal of dyes from aqueous solution. This study was carried out to examine the adsorption capacity of the low cost adsorbent prepared from ripened Bauhenia racemosa seed pods(BRSP) for the removal of Remazol black 5(RB5) dye from aqueous solution. The influence of contact time, pH, adsorbent dose on the adsorption process was studied. The experimental results indicated that the rate of adsorption increased rapidly with time and equilibrium was attained within about eighty minutes. The adsorption kinetics of Remazol black 5 onto the low cost adsorbent used in this study followed first order Lagergren kinetic rate equation. The intra particle diffusion study shows that the rate constants for intra particle diffusion (Kp)increased with increase in initial concentration of Remazol black 5 solution.