title: Sorption and preconcentration of metal ions in ethanol solution with a silica gel surface chemically modified with benzimidazole.
abstract: The adsorption isotherms of MCl(2) (M Mn, Ni, Cu, Zn and Cd) and FeCl(3) by silica gel chemically modified with benzimidazole molecules ( Si(CH(2))(3)NC(7)H(5)N) were studied in ethanol solution at 298 K. A column made of modified silica was used to adsorb and preconcentrate the above metal ions from ethanol solution. Elution was done with 0.1 M hydrochloric acid in an ethanol/water mixture having a mole fraction of water of 0.8. The material was applied in the preconcentration of metal ions from commercial ethanol normally used as engine fuel.
authors.affiliation: Departmento de Fisica e Química, UNESP, C.P. 31, 15385-000, Ilha Solteira, SP, Brazil.
authors.forename: N L
authors.initials: NL
authors.lastname: Filho
authors.forename: Y
authors.initials: Y
authors.lastname: Gushikem
authors.forename: W L
authors.initials: WL
authors.lastname: Polito
authors.forename: J
authors.initials: J
authors.lastname: Moreira
authors.forename: E O
authors.initials: EO
authors.lastname: Ehirim