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http://dx.doi.org/10.5322/JES.2012.21.5.623

Adsorption of Non-degradable Eosin Y by Activated Carbon  

Lee, Min-Gyu (Department of Chemical Engineering, Pukyong National University)
Kam, Sang-Kyu (Department of Environmental Engineering, Jeju National University)
Suh, Keun-Hak (Department of Chemical Engineering, Pukyong National University)
Publication Information
Journal of Environmental Science International / v.21, no.5, 2012 , pp. 623-631 More about this Journal
Abstract
The adsorption behavior of Eosin Y on activated carbon (AC) in batch system was investigated. The adsorption isotherm could be well fitted by the Langmuir adsorption equation. The kinetics of adsorption followed the pseudo-second-order model. The temperature variation was used to evaluate the values of free energy (${\Delta}G^{\circ}$), enthalpy (${\Delta}H^{\circ}$) and entropy (${\Delta}S^{\circ}$). The positive value of enthalpy change ${\Delta}H^{\circ}$ for the process confirms the endothermic nature of the process and more favourable at higher temperature, the positive entropy of adsorption ${\Delta}S^{\circ}$ reflects the affinity of the AC material toward Eosin Y and the negative free energy values ${\Delta}G^{\circ}$ indicate that the adsorption process is spontaneous. With the increase of the amount of AC, removal efficiency of Eosin Y was increased, but adsorption capacity was decreased. And adsorption capacity was increased with the decrease of particle size. With the increase of the amount of AC, removal efficiency of Eosin Y was increased, but adsorption capacity was decreased. And adsorption capacity was increased with the decrease of particle size.
Keywords
Dye; Eosin Y; Activated carbon; Adsorption;
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