Kinetics and Equilibrium Studies of Electro Adsorption of Remazol Red on Modified Stainless Steel Electrode

Abstract

Remazol Red B compounds are dyes including azo groups. These compounds are reactive and often used in the textile industry. About 70 % of dyes are synthetic azo dyes, representing a highly diverse group of dyes characterized by nitrogen to nitrogen double bonds (so called azo bonds, -N=N-). Many azo dyes and their metabolites are recalcitrant in nature and can be highly toxic to both terrestrial and aquatic life. The electroadsorption of remazol red from aqueous solution has been investigated. Batch electroadsorption experiments were performed and kinetic and equilibrium was tested. The result shows that Stainless steel electrode can remove remazol red from aqueous solution. To predict the adsorption phenomena and to determine the characteristic parameters for process design, three kinetic models : Pseudo first order, pseudo second order and Elovich, and three equilibrium of adsorption model : Langmuir, Freundlich and Jovanovic were applied to experimental data. The Kinetic and Equilibrium of the adsorption were found to fit the Elovich and Freundlich model.