Ali Mansri
University of Tlemcen, Algeria
Title: Bentonite/polyacrylamide micro-composites – New materials for water treatment
Biography
Biography: Ali Mansri
Abstract
The last few years have seen a growing interest around the formulation of Bentonite/copolymer micro-composites. ¶TTheir technological and fundamental interest and applications lead to several synthesis procedures. In the present presentation, new organophilic micro-composite materials derived Poly(acrylamide-VP) copolymers/Bentonite [PPAM/BEN] were formulated, with Bentonite as a mineral material and Poly(acrylamide-VP) [PPAM] copolymer derivatives. Thus, hydrophobically modified water soluble Poly(acrylamide-VP) [PPAM] copolymers were prepared by classical or adiabatic radical polymerizations of acrylamide and Bentonite in heterogeneous medium in the presence and absence quaternary ammonium surfactants. The properties of the obtained micro-composites in aqueous solution depend on the experimental conditions, especially on the monomer ratios and on the Bentonite rate. They give a suspension when mixed energetically in water. Both the copolymers and the micro-composites materials were characterized using various techniques like 1HNMR, 13CNMR and ultraviolet spectroscopies, GPC and viscosity. The results of the thermal characterization by TGA showed good stability of the materials at high temperatures.
These organophilic micro-composite materials were used for the pollutants retentions from aqueous solutions. Experiments show very good results which become more important with the materials based on the low ratios of Bentonite [PPAM-VP/BEN]. These micro-composites [PPAM/BEN] were tested, for the first time, in the Flocculation process water treatment. The tests are conducted on a semi-industrial experimental pilot. Good Flocculation yields were observed.