Adsorption of Bismarck Brown R Dye from Aqueous Solution onto Activated Carbon Prepared from Delonix Regia Pods shell (Flame Tree)

A. Rajappa¹, K. Ramesh² and V. Nandhakumar^3*
1 Department of chemistry, Sri Manakula Vinayagar Engineering College, Madagadipet, Puducherry,India.
² Department of chemistry, Arasu Engineering College, Kumbakonam, Thanjavur, India.
^3*Department of chemistry, A.V.V.M  Sri Pushpam college, Poondi, Thanjavur, India.

Abstract
Commercial Activated Carbon has been widely used as a good adsorbent. Activated carbon prepared from Delonix regia pods shell (Flame tree) may be alternative an adsorbent. This work deals with the study of adsorption Bismarck Brown R dye from aqueous solution onto Carbon prepared from Delonix regia pods (Flame tree) activated with Zinc chloride (DRZAC) under various experimental conditions. Batch mode adsorption experiments were conducted. The characteristics of the DRZAC were determined by BET analysis and pH_ZPC.Experimental data obtained were fitted with linearised forms of Ho and Legergren kinetic models. The Sum of Error Squares Percentage (SSE %) for second order and first order kinetics were 2.73 & 5.56 respectively and hence this adsorption followed second order kinetics. Equilibrium isotherms data were fitted with Langmuir, Freundlich, Tempkin and Dubinin-Raduskevich isotherm equations. The equilibrium data was best described by Freundlich isotherm model. Significance of these results were discussed in detail. The results in this study indicated that DRZAC could be employed as an adsorbent for the removal of Bismarck Brown R dye from an aqueous solution.
Keywords: Adsorption, Delonix Regia ZnCl₂ Activated Carbon, Bismarck Brown R Dye, Kinetic Models, Isotherms.