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http://dx.doi.org/10.7464/ksct.2014.20.1.035

Study on Equilibrium, Kinetic and Thermodynamic for Adsorption of Quinoline Yellow by Granular Activated Carbon  

Lee, Jong-Jib (School of Chemical Engineering, Kongju National University)
Publication Information
Clean Technology / v.20, no.1, 2014 , pp. 35-41 More about this Journal
Abstract
Batch adsorption studies were carried out for equilibrium, kinetic and thermodynamic parameters for quinoline yellow adsorption by granular activated carbon ($8{\times}30mesh$, $1,578m^2/g$) with varying the operating variables like initial concentration, contact time and temperature. Equilibrium adsorption data were fitted into Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms. From estimated Langmuir constant ($R_L=0.0730{\sim}0.0854$), Freundlich constant (1/n = 0.2077~0.2268), this process could be employed as effective treatment for removal of quinoline yellow. From calculated Temkin constant (B = 15.759~21.014 J/mol) and Dubinin-Radushkevich constant (E = 1.0508~1.1514 kJ/mol), this adsorption process is physical adsorption. From kinetic experiments, the adsorption process were found to confirm to the pseudo second order model with $r^2$ > 0.99 for all concentrations and temperatures. Thermodynamic parameters like activation energy, change of free energy, enthalpy, and entropy were also calculated to predict the nature adsorption. The activation energy value (+35.137 kJ/mol) and enthalpy change (35.03 kJ/mol) indicated endothermic nature of the adsorption process. Entropy change (+134.38 J/mol K) showed that increasing disorder in process. Free energy change found that the spontaneity of process increased with increasing adsorption temperature.
Keywords
Quinoline yellow; Activated carbon; Adsorption; Dye adsorption; Dye;
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Times Cited By KSCI : 2  (Citation Analysis)
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