title: Removal of Cadmium from aqueous solution by polysaccharide produced from Paenibacillus polymyxa.
abstract: This paper deals with the removal of Cadmium from aqueous solutions by polysaccharide produced from Paenibacillus polymyxa. The effects of contact time, initial metal ions concentration, mass of the polysaccharide and pH were studied. The Freundlich and Dubinin-Radushkevich (D-R) models have been applied and the equilibrium adsorption was found to best fit the Dubinin-Radushkevich adsorption isotherm based on the coefficient of correlation, R(2). The maximum Cd(2+) uptake was 520.09 mg g(-1). An empirical modeling was performed by using a 2(3) full factorial design and a regression equation for adsorption of Cd(2+) was determined from the data. The pH and the initial concentration of Cadmium are the most significant parameters affecting Cd(2+) adsorption followed by the mass of the polysaccharide.
authors.affiliation: Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediène, Bab Ezzouar 16111, Alger Algeria. hmokadz@yahoo.fr
authors.forename: H
authors.initials: H
authors.lastname: Mokaddem
authors.forename: Z
authors.initials: Z
authors.lastname: Sadaoui
authors.forename: N
authors.initials: N
authors.lastname: Boukhelata
authors.forename: N
authors.initials: N
authors.lastname: Azouaou
authors.forename: Y
authors.initials: Y
authors.lastname: Kaci
mesh_terms: D001673:Biodegradation, Environmental; D002104:Cadmium / Q000302:isolation & purification*; D008956:Models, Chemical; D056507:Paenibacillus / Q000737:chemistry*; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D011135:Polysaccharides, Bacterial; D012996:Solutions; D014874:Water Pollutants, Chemical; D002104:Cadmium