Zeinab Ibrahim - Laboratoire Matériaux, Catalyse, Environnement et Méthodes Analytiques (MCEMA), EDST, FS, Université Libanaise, Campus Hariri, Hadath, Beyrouth, Liban.
Yehya Mohsen - Laboratoire Matériaux, Catalyse, Environnement et Méthodes Analytiques (MCEMA), EDST, FS, Université Libanaise, Campus Hariri, Hadath, Beyrouth, Liban.
Joumana Toufaily - Laboratoire des Etudes Appliquées au Développement Durable et Energie Renouvelable (LEADDER), EDST, Université Libanaise, Campus Hariri, Hadath, Beyrouth, Liban
Wassim Rammal - Université Libanaise, Faculté des sciences V, Nabatieh, Liban
Tayssir Hamieh - Laboratoire Matériaux, Catalyse, Environnement et Méthodes Analytiques (MCEMA), EDST, FS, Université Libanaise, Campus Hariri, Hadath, Beyrouth, Liban.
T. Jean Daou - Université de Strasbourg, Université de Haute Alsace, Axe Matériaux à Porosité Contrôlée (MPC), Institut de Science des Matériaux de Mulhouse (IS۲M), UMR CNRS ۷۳۶۱, ENSCMu, ۳ bis rue Alfred
Maria-Laura Foddis - DICAAR-Dipartimento di Ingegneria Civile Ambientale e Architecttura, Università de Cagliari, Italia
bachar Koubaissy - Laboratoire des Etudes Appliquées au Développement Durable et Energie Renouvelable (LEADDER), EDST, Université Libanaise, Campus Hariri, Hadath, Beyrouth, Liban

Activated Montmorillonite (AM) reveals as a low-cost and efficient adsorbent for the adsorption of nicotine and pyridine from aqueous solutions. In this study, the influence of several operation conditions (initial compounds concentration, volumetric flow rate, and height of bed) on the shape of breakthrough curves and the mass transfer resistance was evaluated. Adsorption experiments were developed in order to determine the adsorption isotherm of the system, then the adsorption of pyridine and nicotine onto activated Montmorillonite in single and binary system has been studied using fixed bed reactor. In continuous adsorption, Results show that the maximum nicotine uptake ۱۱۰ mg/g of AM was achieved through electrostatic attraction and hydrogen bond at a pH = ۶.۳, a flow rate of ۱ ml/min and a height of bed equal to ۱۲ mm. In binary mixtures, zeolites adsorption is governed primarily by the size of pollutants present in water. Thus, the bigger compound (in this case, Nicotine), was adsorbed more easily than the pyridine present in the mixture. Experimental data were fitted according to Fowler Guggenheim for the isotherms and Wolborska model for the breakthroughs. AM was regenerated by ethanol and the results show that about ۹۴% of the adsorption capacity is maintained after three times of cyclic adsorption-desorption process.

Adsorption, Nicotine, Pyridine, Fixed-bed column, activated Montmorillonite