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kinetic adsorption of pharmaceuticals on activated carbons was investigated. Applicability of mathematical models for estimating the kinetic patterns of sulfanilamide, sulfathiazole, levamisole, procaine and caffeine adsorption on activated carbons with different porous structure was analyzed. The adequacy of the Boyd and Morris-Weber diffusion models at the initial section of kinetic curves (up to F  0.4–0.6) was shown. Observations revealed that the effective diffusion coefficients and adsorption rate constants of the reviewed kinetic models increased according to the following series: levamisole < sulfathiazole < procaine < sulfanilamide < caffeine. A pseudo-second order model reflects the adsorption regularities in the most accurate way.

Kinetic adsorption modeling of pharmaceuticals on activated carbons