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Adsorption Characteristics of Methylene Blue and Phenol from Aqueous Solution using Coal-based Activated Carbon
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 Title & Authors
Adsorption Characteristics of Methylene Blue and Phenol from Aqueous Solution using Coal-based Activated Carbon
Lee, Song-Woo; Kam, Sang-Kyu; Lee, Min-Gyu;
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The efficiency of coal-based activated carbon in removing methylene blue (MB) and phenol from aqueous solution was investigated in batch experiments. The batch adsorption kinetics were described by applying pseudo-first-order, pseudo-second-order, and first order reversible reaction. The results showed that the adsorption of MB and phenol occurs complexed process including external mass transfer and intraparticle diffusion. The maximum adsorption capacity obtained from Langmuir isotherm was 461.0 mg/g for MB and 194.6 mg/g for phenol, respectively. The values of activation parameters such as free energy (), enthalpy (), and entropy () were also determined as -19.0~-14.9 kJ/mol, 25.4 kJ/mol, and 135.2 J/mol K for MB and 51.8~54.1 kJ/mol, -29.0 kJ/mol, and -76.4 kJ/mol K for phenol, respectively. The MB adsorption was found to be endothermic and spontaneous process. However, the CV adsorption was found to be exothermic and non-spontaneous process.
Activated carbon;Adsorption;Dye;Phenol;Methylene blue;
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양이온 K+, Na+, Mg2+, Ca2+, Al3+ 형태로 개질한 제올라이트에 의한 리튬 이온의 흡착 특성,박정민;감상규;이민규;

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