Journal
APPLIED WATER SCIENCE
Volume 7, Issue 6, Pages 3031-3040Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13201-016-0414-3
Keywords
Drugs; Clay; Characterization; Adsorption; Kinetics; Isotherms; Thermodynamics
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Funding
- National Institute of Research and Physico-chemical Analysis (INRAP)
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This study aimed to describe the adsorption of three pharmaceuticals compounds (ibuprofen, naproxen and carbamazepine) onto natural clay on the basis of equilibrium parameters such as a function of time, effect of pH, varying of the concentration and the temperature. Adsorption kinetic data were modeled using the Lagergren's first-order and the pseudo-second-order kinetic equations. The kinetic results of adsorption are described better using the pseudo-second order model. The isotherm results were tested in the Langmuir, Freundlich and Dubinin-Radushkevich models. The thermodynamic parameters obtained indicate that the adsorption of pharmaceuticals on the clay is a spontaneous and endothermic process.
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