Kinetics and Equilibrium Studies on Biosorption of CBB by Coir Pith

Abstract: The biosorption of Coomassie Brilliant Blue by acid treated coir-pith has been investigated in batch mode. Effect of time, Initial Concentration of dye and initial adsorbent concentration on biosorption was investigated. The pseudo-first order kinetic model was applied to the adsorption system and high co-relation co-efficient favored Pseudo-second order reaction. Freundlich’s and Langmuir’s mathematical models were used to describe batch adsorption equilibrium data and the constants were evaluated. The adsorption was found to be favourable in both isotherms. The maximum adsorption capacity was found to be 31.847mg/g. The adsorption capacity for the system was 6.438 and adsorption intensity was 2.8019. The investigation shows that the acid-treated coir pith is better suited for the removal of dyes from the textile industry effluent. Key words: Biosorption • coco-pith • CBB • Langmuir’s • Freundlich’s isotherm