title: Effect of adsorption of Pb(II) and Cd(II) ions in the presence of EDTA on the characteristics of electrical double layers at the ion exchanger/NaCl electrolyte solution interface.
abstract: The main propose of this work was to describe the basic parameters of electrical double layer structures of the ion exchanger/NaCl before and after the sorption process of Pb(II) and Cd(II) ions from aqueous solutions in the presence of the complexing agent EDTA (ethylenediaminetetraacetic acid). In the studies the following ion exchangers were used: cation exchangers Micro-ionex (in the H(+) and NH(+)(4) forms), Dowex 50W x 4 (in the H(+) form), and Dowex 50W x 12 (in the H(+) form); anion exchangers Dowex 1 x 4 (in the Cl(-) form) and Dowex 1 x 8 (in the Cl(-) form). Study of the physicochemical properties of the sample surface was carried out. The influence of ionic strength, pH, and solution interface was investigated. Electrophoretic mobility, surface charge density, and parameters for different concentrations of the electrolytes under question were presented. pH was changed from 3 to 10. The studies were carried out for the M(II)-EDTA = 1:1 system. The effects of the concentration of the solution containing the above-noted complexes and of the ion exchange/solution phase contact time on sorption capacities of the ion exchangers under consideration were studied. Kinetic parameters of the sorption process were also determined.
authors.affiliation: Department of Inorganic Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Skłodowska Sq. 2, 20-031 Lublin, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Kołodyńska
authors.forename: Ewa
authors.initials: E
authors.lastname: Skwarek
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Hubicki
authors.forename: Władysław
authors.initials: W
authors.lastname: Janusz
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification*; D004492:Edetic Acid / Q000737:chemistry*; D024202:Electrophoretic Mobility Shift Assay; D007475:Ion Exchange Resins / Q000737:chemistry*; D007700:Kinetics; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification*; D012965:Sodium Chloride / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D007475:Ion Exchange Resins; D002104:Cadmium; D014867:Water; D007854:Lead; D012965:Sodium Chloride; D004492:Edetic Acid