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http://dx.doi.org/10.4491/KSEE.2013.35.3.220

Thermodynamic Analysis of Phenol Adsorption by Powdered Activated Carbon  

Kim, Hwanik (Department of Environmental Engineering Green Technology Institute, Gyeongnam National University of Science and Technology)
Lee, Myoung-Eun (Department of Environmental Engineering Green Technology Institute, Gyeongnam National University of Science and Technology)
Kang, Seoktae (Department of Civil Engineering, Kyunghee University)
Chung, Jae-Woo (Department of Environmental Engineering Green Technology Institute, Gyeongnam National University of Science and Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.35, no.3, 2013 , pp. 220-225 More about this Journal
Abstract
The adsorption characteristics of phenol by the powdered activated carbon (PAC) were investigated by series of batch experiments. The pseudo-second-order model described the adsorption kinetics adequately with correlation coefficients over 0.999, indicating chemical adsorption as the rate-limiting step. The kinetic rate constants were from 0.55 to 19.81 mg $mg^{-1}min^{-1}$. The adsorption isotherm followed the Langmuir isotherm, indicating the homogeneous mono-layer adsorption onto the surface of the adsorbent. The values of activation energy, enthalpy and entropy were 17.44 kJ $mol^{-1}$, -8.26 kJ $mol^{-1}$ and -18.94 J $mol^{-1}K^{-1}$, respectively. The Gibbs free energy was in the range of -2.89~-2.14 kJ $mol^{-1}$. The results show that the phenol adsorption is physical, spontaneous and exothermic reaction.
Keywords
Phenol; Activated Carbon; Adsorption; Kinetics; Isotherm; Thermodynamic;
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Times Cited By KSCI : 2  (Citation Analysis)
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