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http://dx.doi.org/10.9713/kcer.2017.55.4.514

Adsorption Equilibrium, Kinetic and Thermodynamic Param  

Lee, Jong Jib (Division of chemical Engineering, Kongju National University)
Publication Information
Korean Chemical Engineering Research / v.55, no.4, 2017 , pp. 514-519 More about this Journal
Abstract
Adsorption characteristics of acid green 27 dye using activated carbon were investigated as function of adsorbent dose, pH, initial concentration, contact time and temperature. Freundlich isotherm explained adsorption of acid green 27 dye very well and Freundlich separation factors (1/n=0.293~0.387) were found that this process could be employed as effective treatment method. Kinetic studies showed that the kinetic data were well described by the pseudo second-order kinetic model. Pseudo second rate constant ($k_2$) decreased with the increase in initial acid green 27 concentration. Activation energy (10.457 kJ/mol) and enthalpy (79.946 kJ/mol) indicated that adsorption process was physisorption and endothermic. Since Gibbs free energy decreased with increasing temperature, spontaneity of adsorption reaction increased with increasing temperature in the temperature range of 298 K~318 K.
Keywords
Acid Green 27; Dye adsorption; Adsorption kinetic; Adsorption; Thermodynamic parameter;
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Times Cited By KSCI : 2  (Citation Analysis)
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