Medicinal product (Paracetamol) removal by adsorption in aqueous solution; Investigation of kinetic parameters, equilibrium and mass transfer

N. Ouazene, N. Belhaneche-Bensemra, A. Khelifi, A. Benbatta


Abstract: The adsorption behavior of the medicinal product, paracetamol, using commercial activated carbon in aqueous solution was investigated. In this work, the study of equilibrium, kinetics as well as the identification of the mass transfer stages that occur in adsorption were carried out.It was found that the appropriate isotherm model for the equilibrium process was the Langmuir, and the monolayer adsorption capacity was found to be 104.17mg.g-1 at 298 K. The result of the adsorption kinetics shows that the adsorption maximum was reached at 60 min and follows the linear form of the pseudo second order kinetics with R2 = 0.99 for the three studied concentrations. Two mathematical models were tested in order to determine the limiting step of the mass transfer of the paracetamol adsorption process onto activated carbon. The results showed that the adsorption process was governed by external diffusion

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