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Adsorption equilibrium isotherms of phenolic compounds,phenol, p-cresol, p-chlorophenol and p-nitrophenol, from aqueoussolutions by Amberlite XAD-4 polymeric adsorbent and its acetylizedderivative MX-4 within temperature range of 283-323K were obtainedand fitted to the Freundlich isotherms. The capacities ofequilibrium adsorption for all four phenolic compounds from theiraqueous solutions increased around 20% on the acetylized resin,which may be contributed to the specific surface area and thepartial polarity on the network. Estimations of the isosteric enthalpy, free energy , and entropy for the adsorption process arereported.
