SORPTION PROPERTIES OF TIO2 AND TIO2/KAOLINITE COMPOSITE

Many researchers described sorption properties nanoparticles of titanium dioxide. Different ions, for example ion of Cr, Cu, Fe, Mn, Ni, and Zn, can be removed from waste water by mentioned nanoparticles. Nanoparticles handing is connected with health risk because there are little information about nanoparticle toxicity. It is suitable immobilized they on balk material. In this work a comparison of sorption properties of titanium dioxide nanoparticles with TiO2/kaolinite composite were done. TiO2/kaolinite composite could have better sorption capacity than kaolinite as well. Nanoparticles of TiO2 and composite of TiO2/kaolinite were prepared by thermal hydrolysis using the titanyl sulphate as a titanium precursor. Prepared materials were characterized by chemical and phase analysis. The sorption of Cd, Cu and Zn in model water solution was studied at constant temperature (at 25 degrees C). Experiments were carried out batch techniques. The concentration of adsorbate in solution after sorption was determined by AAS-FA. Surface of the materials after treatment was studied by electron microscopy. The measured results were described by adsorption isotherms. Calculated adsorption capacities were compared.