Vasudevan, S. and Lakshmi, J. and Vanathi, R. (2010) Electrochemical Coagulation for Chromium Removal: Process Optimization, Kinetics, Isotherms and Sludge Characterization. Clean, 38 (1). 9 -16.

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Abstract

This study presents an electrochemical coagulation process for the removal of chromium from water using magnesium as the anode and galvanized iron as the cathode. The effects of pH, current density, concentration, temperature, adsorption kinetics and adsorption isotherms on chromium removal were investigated. The results showed that an optimum removal efficiency of 98.6% was achieved at a current density of 0.2 A/dm2 and a pH of 7.0. The adsorption kinetics showed that the first order rate expression fitted the adsorption kinetics. The equilibrium isotherm was measured experimentally. Results were analyzed by Langmuir, Freundlich, Dubinin- Redushkevich and Frumkin isotherms using linearized correlation coefficients. The characteristic parameters for each isotherm were determined. The Langmuir adsorption isotherm was found to fit the equilibrium data best for chromium adsorption. Temperature studies showed that adsorption was endothermic and spontaneous in nature.

Item Type:	Article
Uncontrolled Keywords:	Adsorption isotherms; Adsorption kinetics; Chromium; Electrochemical removal process
Subjects:	Electroinorganic
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	17 Jan 2012 11:03
Last Modified:	17 Jan 2012 11:03
URI:	http://cecri.csircentral.net/id/eprint/186

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