Author/Authors :
Bousba, S Département de Génie des Procédés - Faculté de Génie des Procédés - Université Salah Boubnider Constantine 3, Algérie , Bougdah, N Département de Pétrochimie et Génie des Procédés - Faculté de Technologie - Université 20 Août 1955-Skikda, Algérie , Messikh, N Département de Pétrochimie et Génie des Procédés - Faculté de Technologie - Université 20 Août 1955-Skikda, Algérie , Magri, P LCP-A2MC, Université de Lorraine - 1, bd Arago-57078 METZ - Cedex 3, France
Abstract :
In this study, the main objective is the preparation and the characterization of a modified Algerian bentonite based adsorbent by
intercalation with hexadecyltrimethylammonium bromide (HDTMA). Natural and modified bentonites were characterized using
thermogravimetric analysis (TGA), X-ray diffraction (XRD) and infrared spectroscopy (FTIR). The X-ray results indicated that the
geometry of the interlayer space changes by the intercalation of HDTMA cations, resulting in an increase in the basal spacing from 1.34 to
1.96 nm. The adsorption efficiency of natural and HDTMA-bentonite was examined for humic acid (HA) removal by batch adsorption
experiments under different operating conditions. The maximum monolayer adsorption capacity qm of HA was found to be 54.80 mg g-1
and 330.34 mg g-1 for natural and HDTMA-bentonite, respectively. The kinetic study indicated that HA adsorption followed the pseudofirst-
order model. Both natural and HDTMA-bentonite showed quite good capabilities in removing HA from aqueous solutions.
Keywords :
Adsorption , Bentonite , HDTMA , Intercalation , Humic acid
