KINETIC MODELLING FOR THE ADSORPTION OF CU (II) IONS ONTO CASSIA FISTULA (L) EPICARP ACTIVATED CARBON

Abstract

An activated carbon was prepared from Cassia fistula (L) Epicarps using phosphoric acid as an activating agent and designated as Cassia fistula Phosphoric acid Activated Carbon (CFPAC). Adsorption kinetics of copper (II) ion from aqueous solution onto the adsorbent CFPAC was investigated by taking different initial concentrations 10,20,30 and 40 mg/L at the temperature 303K.Kinetic data were fitted with Lagergren, Ho and Webber-Morris equations for pseudo first order and pseudo second order and intra particle diffusion models respectively. According to Mean of Sum of Squired Error (MSSE) tool, the adsorption followed pseudo second order kinetic equation. Intra particle diffusion was the rate determining step as per Webber Morris plot constant values.