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KMID : 1024520120210020623
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Journal of the Environmental Sciences
2012 Volume.21 No. 2 p.623 ~ p.631
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Adsorption of Non-degradable Eosin Y by Activated Carbon
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Lee Min-Gyu
Kam Sang-Kyu
Suh Kuen-Hack
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Abstract
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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 (ΔGo), enthalpy (ΔHo) and entropy (ΔSo).
The positive value of enthalpy change ΔH° for the process confirms the endothermic nature of the process and more
favourable at higher temperature, the positive entropy of adsorption ΔS° reflects the affinity of the AC material toward Eosin
Y and the negative free energy values ΔG° 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.
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KEYWORD
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Dye, Eosin Y, Activated carbon, Adsorption
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