Article

Adsorption

, Volume 19, Issue 2, pp 423-434

Open Access This content is freely available online to anyone, anywhere at any time.

Adsorption of Ni(II) from model solutions using co-precipitated inorganic oxides

  • Filip CiesielczykAffiliated withPoznan University of Technology, Institute of Chemical Technology and Engineering Email author 
  • , Przemysław BartczakAffiliated withPoznan University of Technology, Institute of Chemical Technology and Engineering
  • , Karolina WieszczyckaAffiliated withPoznan University of Technology, Institute of Chemical Technology and Engineering
  • , Katarzyna Siwińska-StefańskaAffiliated withPoznan University of Technology, Institute of Chemical Technology and Engineering
  • , Magdalena NowackaAffiliated withPoznan University of Technology, Institute of Chemical Technology and Engineering
  • , Teofil JesionowskiAffiliated withPoznan University of Technology, Institute of Chemical Technology and Engineering

Abstract

The aim of this work was to obtain an inorganic oxide system containing silica and magnesium oxide, and characterized by specific physicochemical properties, in particular well-defined adsorption parameters. The preparation process was carried out according to a co-precipitation method using solutions of sodium silicate and selected inorganic magnesium salt. The oxide system obtained (MgO·SiO2) was used as a support (adsorbent) of nickel(II) ions, whose precursors were model solutions of nitrates. The effectiveness of the adsorption process was evaluated using many different analytical techniques, including atomic absorption spectroscopy, energy dispersive X-ray spectroscopy and equivalent point titration. Moreover the stability of adsorbent/adsorbate bonding was estimated. The oxide systems—adsorbents—used in the process were also analyzed according to their physicochemical properties, especially changes in adsorption parameters. The last part of the study involved evaluation of the kinetics of the adsorption process depending on time and the pH of the reaction system.

Keywords

Inorganic oxide adsorbent Nickel(II) ions Adsorption Atomic absorption spectroscopy Energy dispersive X-ray spectroscopy Equivalent point titration