• Dmytro V. Tarnovsky Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine
  • Mykola M. Tsyba Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine
  • Lubov S. Kuznetsova Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine
  • Tatiana A. Khodakovska Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine
  • Iryna V. Romanova Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine



titania, composites, cerium and ferric doped, adsorption, phoshate ions


Two types of materials on the base of titanium hydroxides are synthesized by co-precipitation and sol–gel method using pure and technical precursors. The ratio of metals in the samples after thermal treatment is determined by XRF analysis. Morphology of composites obtained is characterized by low-temperature nitrogen adsorption/desorption technique. Adsorption of phosphate ions that has been considered as serious water pollutants onto individual titania and titania doped by ceria and ferric oxides obtained by two methods is studied in the wide region of pH. All samples investigated demonstrate the high removal ability for phosphate anions at pH 2. The sample of titania doped cerium and ferric obtained by sol-gel method exhibits the highest adsorption capacity towards adsorbed ions of 3.6 mmol/g. The adsorption isotherms have been fitted to the Langmuir, Freundlich and Temkin models. The equilibrium data of non-doped by cerium samples agreed satisfactory with the Langmuir isotherm model. Temkin model of isotherm well describes the experimental data regardless the method used for synthesis with the highest values of the coefficient of determination.


Author Biographies

Dmytro V. Tarnovsky, Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine

PhD student

Iryna V. Romanova, Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine

Head of department of sorption and fine inorganic synthesis of Institute for Sorption and Problems of Endoecology NAS of Ukraine, doctor of chemical sciences, Senior Researcher.


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Physical and inorganic chemistry