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Separation and Purification Technology, Vol.12, No.1, 1-11, 1997
Adsorption and desorption of cephalosporin C on nonionic polymeric sorbents
Adsorption and desorption of cephalosporin C on nonionic polymeric sorbents were studied in order to obtain basic information on recovering cephalosporin C from aqueous solutions. The sorbents were polystyrene-based macroreticular resins with different sorptive capacity and pore-size distribution. Cephalosporin C adsorbed on these sorbents was then desorbed by aqueous isopropyl alcohol (IPA) solutions. Adsorption equilibrium data of cephalosporin C and IPA on these sorbents were found to fit the Freundlich equation and the desorption of cephalosporin C by IPA was described by a competitive adsorption model based on the ideal adsorbed solution theory. Furthermore, a simple dynamic model was formulated to describe both adsorption and desorption breakthrough curves of cephalosporin C. (C) 1997 Elsevier Science B.V.