입상 활성탄에 의한 Safranin의 흡착에 관한 평형, 동력학 및 열역학에 관한 연구 = Equilibrium, Kinetics and Thermodynamics Studies about Adsorption of Safranin by Granular Activated Carbon

다국어 초록 (Multilingual Abstract)

Adsorption of Safranin using granular activated carbon from aqueous solution was investigated. Batch experiments were carried out as a function of adsorbent dose, initial concentration, contact time and temperature. The equilibrium adsorption data were fitted to Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. Based on an estimated Langmuir separation factor, RL = 0.183~0.254 and a Freundlich separation factor, 1/n = 0.518~0.547, this process could be employed as an effective treatment method. Adsorption data were also modeled using the pseudo-first and second-order kinetic equations. It was shown that the pseudo-second-order kinetic equation could best describe the adsorption kinetics. The negative Gibbs free energy (△G = -3.688~-7.220 kJ/mol) and positive enthalpy (△H = 33.126 kJ/mol) indicated that the adsorption process was spontaneous and endothermic.

참고문헌 (Reference)

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