Informatics Publishing Limited

A. S. Jadhav ¹, G. T. Mohanraj ²

Affiliations
1 Department of Chemical Engineering, AISSMS, COE, Pune, Maharashtra, IN
2 Department of Chemical Technology, Birla Institute of Technology, Mesra, Ranchi, IN

Abstract

Activated carbon was prepared from coconut leaves by using chemical activation method, using phosphoric acid as dehydrating agent and at slow pyrolysis of 400°C in inert atmosphere. The present study, explored the feasibility of using waste coconut leaves (CL) based carbon as adsorbent for the removal of lead under different temperature conditions from waste solution. BET surface area of CL₃ found 1060.57 m²/g greater than CL₁ and CL₂. The batch sorption study experiments were conducted with respect to solute concentration (2.8-110 mg/L) and solution temperature (40-70°C). The Langmuir Isotherm, Freundlich Isotherm and Temkin Isotherm studies were conducted and applied to the experimental equilibrium data, and isotherm constants are calculated. A comparison of kinetic models was applied to the adsorption of lead ion. Coconut leaves carbon was evaluated for the, Elovich, intraparticle diffusion and Bangham's kinetic models. The experimental data fitted very well for the pseudo first-order and pseudo second-order. The results show that the sorption capacity increases with an increase in solution temperature from 40°C, 50°C, 60°C and 70°C. The results have established good potentiality for the carbon particles to be used as a sorbent for the removal of lead from wastewater.

Keywords

Lead, Coconut Leaves, Activated Carbon, Kinetic Models.

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