PATULIN ADSORPTION-KINETICS ON ACTIVATED CARBON, ACTIVATION-ENERGY AND HEAT OF ADSORPTION

The kinetics of adsorption of patulin on activated carbon were studied at different initial patulin concentrations (100-400 ppb) for the tem perature range 20-80 degrees C. Apparent adsorption rate constants (k( aapp)) were changed from 1.07 x 10(-3) to 1.86 x 10(-3) g(-1) min(-1) while the temperature increased from 20 to 80 degrees C. For equilibri um adsorption curves; the Langmuir model was attempted and model param eters (K and Q degrees) were obtained for different temperatures. Ener gy of activation and heat of adsorption were determined in a batch ads orption system (E(a) = 2.02 kcal/mol and Delta H = 2.24 kcal/mol). The adsorption occurred endothermically and by physical mechanisms.