title: Equilibrium and kinetics characteristics of copper (II) sorption onto gyttja.
abstract: The sorption characteristics of gyttja to remove copper (Cu(2+)) ions from aqueous solutions were satisfactorily described with the Freundlich, Langmuir and Dubinin-Redushckevich (D-R) models. The sorption capacity (q (max)) of gyttja was 11.76 mg g(-1). The D-R model indicated that the sorption of Cu(2+) by gyttja was almost taken place by chemisorption. Thermodynamic parameters such as change in free energy (DeltaG), enthalpy (DeltaH), and entropy (DeltaS) suggested that the adsorption process of Cu(2+) by gyttja was feasible, spontaneous and endothermic in nature. Kinetic examination of the equilibrium data showed that the sorption processes of Cu(2+) ions followed well pseudo-second-order kinetics model.
authors.affiliation: Department of Soil Science, Kahramanmaras Sütçü Imam University, 46100, Kahramanmaras, Turkey. hdikici@ksu.edu.tr
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Dikici
authors.forename: Kadir
authors.initials: K
authors.lastname: Saltali
authors.forename: Serap
authors.initials: S
authors.lastname: Bingölbali
mesh_terms: D000327:Adsorption; D003031:Coal; D003300:Copper / Q000737:chemistry*; D007700:Kinetics; D012987:Soil; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D003031:Coal; D012987:Soil; D014874:Water Pollutants, Chemical; D003300:Copper