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Removal of Cr(VI) from Aqueous Solutions by Adsorption Onto Hazelnut Shell Activated Carbon: Kinetic and Equilibrium Studies

Overview
Journal Bioresour Technol
Specialty Biophysics
Date 2003 Nov 11
PMID 14607493
Citations 19
Authors
M Kobya
Affiliations
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Abstract

The adsorption Cr(VI) from aqueous solutions onto hazelnut shell activated carbon was carried out by varying the parameters such as pH, initial Cr(VI) concentration and temperature. The experimental data fitted well to the pseudo first-order kinetic model and then the rate constants were evaluated. The Langmuir isotherm provided the best correlation for Cr(VI) onto the activated carbon. Adsorption capacity was calculated from the Langmuir isotherm as 170 mg/g at an initial pH of 1.0 for the 1000 mg/l Cr(VI) solution. Thermodynamic parameters were evaluated and the adsorption is endothermic showing monolayer adsorption of Cr(VI).

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