화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.10, No.2, 295-301, March, 2004
Adsorption Behavior of p-Chlorophenoxyacetic Acid on Activated Carbon
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Characteristics of the adsorption of p-chlorophenoxyacetic acid from aqueous solution onto a granular activated carbon (GAC), F-400, were studied at pH 3.5, 7.0, and 10. Equilibria for the adsorption of p-chlorophenoxyacetic acid onto GAC can be represented by the Sips equation. Equilibrium capacity increased with decreasing pH and temperature of the solution. The differences in the rates of adsorption are attributed primarily to differences in the equilibria at the various values of pH. Intraparticle diffusion is explained by a pore diffusion mechanism. An adsorption model, based on the linear driving force approximation (LDFA), is used to simulate the adsorption behavior of p-chlorophenoxyacetic acid in a fixed bed adsorber. Desorption of p-chlorophenoxyacetic acid was about 90% only using distilled water of usually pH 6.
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