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Chemical Engineering Communications Volume 198, 2011 - Issue 5
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Original Articles

ADSORPTION AND KINETIC STUDIES ON THE INHIBITION POTENTIAL OF FLUCONAZOLE FOR THE CORROSION OF Al IN HCl SOLUTION

I. B. Obot Faculty of Science, Department of Chemistry, University of Uyo, Uyo, NigeriaCorrespondence[email protected]
,
N. O. Obi-Egbedi Department of Chemistry, University of Ibadan, Ibadan, Nigeria
,
S. A. Umoren Faculty of Science, Department of Chemistry, University of Uyo, Uyo, Nigeria
&
E. E. Ebenso Department of Chemistry, North West University (Mafikeng Campus), Mmabatho, South Africa
Pages 711-725 | Published online: 03 Jan 2011
 
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Abstract

The adsorption of fluconazole (FLU) on aluminum surface from 0.1 M HCl solution was studied using chemical technique at 30°–50°C. The values for free energy of adsorption, , were calculated at each surface coverage, θ, of the studied compound by applying the mathematical model of the Bockris-Swinkels adsorption isotherm. The phenomenon of physical adsorption is proposed from the value of Gibbs free energy, , obtained from the Bockris-Swinkels adsorption equation and the mean adsorption energy, E, using the adsorption isotherm model of Dubinin-Radushkevich (D-R). A zero-order kinetics relationship with respect to aluminum was obtained with and without FLU from the kinetic treatment of the data.

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