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http://dx.doi.org/10.5762/KAIS.2014.15.5.3319

Equilibrium Kinetics and Thermodynamic Parameters Studies for Eosin Yellow Adsorption by Activated Carbon  

Lee, Jong Jib (Division of Chemical Engineering, Kongju National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.5, 2014 , pp. 3319-3326 More about this Journal
Abstract
Eosin yellow is used a dye and colorant but it is harmful toxic substance. In this paper, batch adsorption studies were carried out for equilibrium, kinetics and thermodynamic parameters for eosin yellow adsorption by activated carbon with varying the operating variables like pH, initial concentration, contact time. Equilibrium adsorption data were fitted into Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms. By estimated Langmuir constant value, $R_L$=0.067-0.083, and Freundlich constant value, $\frac{1}{n}=0.237-0.267$, this process could be employed as effective treatment for removal of eosin yellow. From calculated Temkin constant, value, B=1.868-2.855 J/mol, and Dubinin-Radushkevich constant, value, E=5.345-5.735 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 good correlation coefficient($r^2$=0.995-0.998). The mechanism of the adsorption process was determined two step like as boundary and intraparticle diffusion.
Keywords
Eosin yellow; Adsorption; Activated carbon; Dye adsorption; Adsorption kinetics;
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