sorption, slag, metal cations, chromates

The aim of this work was to find if slags could be multifunction sorbents. The contribution is aimed at characterization of slags and their sorption properties. It was found by infrared analysis that blast furnace slag contains mainly silicates and a small amount of carbonates. Steel making slag has lower content of silicate minerals and a higher amount of carbonates. The characterized samples of the blast furnace and steel making slags were tested as possible sorbents. The sorption experiments were carried out by batch method in aqueous medium. The selected metal cations and anions were used as adsorbates. It was found that metal cations removing is influenced by alkalization property of slags. The mechanism of the metal cations removing is supposed to be an adsorption combined with precipitation indicated by a high pH after sorption experiments. Slags can be possibly used for remediation of wastewater containing metal ions.