title: Competitive adsorption of toxic metals on bentonite and use of chitosan as flocculent coagulant to speed up the settling of generated clay suspensions.
abstract: Evaluation of modified Algerian clay as mineral adsorbent was done for its adsorbing capacity on copper (Cu) and Zinc (Zn) cations. The results obtained show a rapid kinetic adsorption for both metals (less than 2 h) following the pseudo-second order model with high elimination rates of 67.2 and 61.8% for Cu and Zn respectively. The adsorption isotherms analyzed with Langmuir model revealed a correlation with the experimental values. While the use of obtained chitosan at room temperature, as flocculent coagulant, accelerates the decantation of the colloidal particles in suspension generated after adsorption process.
authors.affiliation: Department of Chemistry, University of Tizi-ouzou, Tizi-Ouzou, Algeria; Scientific and Technical Research Centre in Physico-Chemical Analyses/Unit on Analyses and Technological Development in Environment, B.P. 384, Bou-Ismail, 42004 Tipaza, Algeria. Electronic address: mdferhatpg2009@gmail.com.
authors.forename: M
authors.initials: M
authors.lastname: Ferhat
authors.affiliation: Department of Chemistry, University of Tizi-ouzou, Tizi-Ouzou, Algeria.
authors.forename: S
authors.initials: S
authors.lastname: Kadouche
authors.affiliation: Centre de Recherche en technologie des Semi-conducteurs pour l'Energétique (CRTSE), 2, Bd Frantz Fanon BP140, Alger - 7 merveilles, 16027, Algeria. Electronic address: nadjibdrouiche@yahoo.fr.
authors.forename: N
authors.initials: N
authors.lastname: Drouiche
authors.affiliation: laboratoire Matériaux Géotechnique, habitat et Urbanisme, Université de Skikda, Algeria.
authors.forename: K
authors.initials: K
authors.lastname: Messaoudi
authors.affiliation: Scientific and Technical Research Centre in Physico-Chemical Analyses/Unit on Analyses and Technological Development in Environment, B.P. 384, Bou-Ismail, 42004 Tipaza, Algeria.
authors.forename: B
authors.initials: B
authors.lastname: Messaoudi
authors.affiliation: Department of Chemistry, University of Bouira, Algeria; Laboratory URIE, Polytechnic National School of Algiers, Algeria. Electronic address: hakim_lounici@yahoo.ca.
authors.forename: H
authors.initials: H
authors.lastname: Lounici
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000032:analysis* / Q000737:chemistry; D001546:Bentonite / Q000737:chemistry*; D002412:Cations; D048271:Chitosan / Q000737:chemistry*; D000077215:Clay; D003300:Copper / Q000032:analysis* / Q000737:chemistry / Q000633:toxicity; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D013535:Suspensions; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000633:toxicity; D018508:Water Purification / Q000379:methods; D015032:Zinc / Q000032:analysis* / Q000737:chemistry / Q000633:toxicity
chemical_list: D000538:Aluminum Silicates; D002412:Cations; D013535:Suspensions; D014874:Water Pollutants, Chemical; D001546:Bentonite; D003300:Copper; D048271:Chitosan; D015032:Zinc; D000077215:Clay
keywords: Adsorption; Chitosan; Copper; Sodium clay; Toxic metal; Zinc