Lead ions sorption using magnetically modified sorbent based on titanium dioxide powder

Abstract Non-magnetic TiO 2 powder and magnetically modified TiO 2 powder were employed for sorption experiments; the magnetically modified TiO 2 particles allow magnetic separation of the sorbents with already adsorbed ions of pollutants. FeSO 4 .7H 2 O was used for synthesis of magnetically responsive TiO 2 . A detailed study of the adsorption/desorption process was performed using batch adsorption experiments carried out with various concentrations of lead ions and contact time. Presence of magnetic iron oxides particles on the surface of sorbents increased the adsorption rate, and increased the maximum amount of adsorbed Pb 2+ ions per mass. Calculated isotherm parameters and desorption experiments showed that the content of magnetic particles influenced the adsorption binding of Pb 2+ ions on the magnetic TiO 2 surface positively.