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高秉弘,鄭在灌 成均館大學校 科學技術硏究所 1991 論文集 Vol.42 No.1
Adsorption on activated carbon on the basis of an effective and widely used process for removing phenolic compounds from umnicipal and industrial waste waters has been studied. Although many adsorption studies have been reported concerning the removal of phenolic compounds from aqueous solution, there remains much to be solved. The liquid-solid reaction encountered in this study is usually complicated by the presence of resistances as a result of film diffusion across the external solid surface and particle diffusion through the pore of solid, it becomes necessary to establish the operating conditions that minimize the influences of film and particle diffusions. This study was attempted to eliminate these diffusional effects and to determine the rates of removal of para-nitrophenol by differential bed reactor approach. The results were as follows. 1) Under the conditions of flow rate of 450㎤/min, of average particle diameter of 0.387mm, and of reactor LD of 34mm, the diffusional resistances were minimized and the initial rate of para-nitrophenol removal was maximized. 2) The reaction kinetics study in this experiment showed that r = 0.111 C_e^1.184 - 0.0229 C_i^1.173q_e^0.187 3) The equilibrium adsorption studies supported the existence of the empirical Freundlich isotherm. The isotherm could be expressed as follows. q_s = 70.583C_s^1/1.521
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