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Isotherm, Kinetic and Thermodynamic Characteristics for Adsorption of Congo Red by Activated Carbon
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 Title & Authors
Isotherm, Kinetic and Thermodynamic Characteristics for Adsorption of Congo Red by Activated Carbon
Lee, Jong Jib;
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 Abstract
Batch experiment studies were carried out for adsorption of congo red using granular activated carbon with various parameters such as activated carbon dose, pH, initial dye concentration, temperature and contact time. Equilibrium experimental data are fitted to the Langmuir, Freundlich, Temkin and Dubin-Radushkevich isotherm equations. From Freundlich's separation factor (1/n) estimated, adsorption could be employed as effective treatment method for adsorption of congo red from aqueous solution. Base on Temkin constant (B) and Dubinin-Radushkevich constant (E), this adsorption process is physical adsorption. Adsorption kinetics has been tested using pseudo-first order and pseudo second order models. The results followed pseudo second order model with good correlation. Adsorption process of congo red on granular activated carbon was endothermic (=42.036 kJ/mol) and was accompanied by decrease in Gibbs free energy (=-2.414 to -4.596 kJ/mol) with increasing adsorption temperature.
 Keywords
Congo Red;Dye Adsorption;Adsorption;Kinetics;Thermodynamics;
 Language
Korean
 Cited by
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