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INFLUENCE OF SURFACE CHEMISTRY OF ACTIVATED CARBON ON THE ADSORPTION OF NATURAL ORGANIC MATTER »« MATHEMATICAL MODEL OF RECYCLING COOLING SYSTEMS

CHARACTERIZATION AND PROSPECTS OF TITANIUM (IV) OXIDE IN WATER TREATMENT (REVIEW)

T.A. Dontsova

National Technical University of Ukraine “Kyiv Polytechnic University”, Kyiv

e-mail: dontsova@ua.fm

The prospect of using sorption materials based on titanium (IV) oxide and their characteristic in water treatment in article is discussed. It was found that in water treatment process wide application may find amorphous titanium oxide, and its crystal modifications – anatase and rutile. Characterization of amorphous titanium oxide and its crystal modifications is given. It is shown that an amorphous titanium oxide is effective sorbent for many inorganic pollutants as cationic and anionic nature; its crystal modifications – for recovery radionuclides and organic compounds of different genesis. Revealed that parameters such as the point of zero charge and intercalation significantly affect on the ion exchange properties and selectivity of sorbents based on titanium (IV) oxide. Titanium (IV) oxide surface chemistry and mechanisms of ion exchange are considered. Methods synthesis of sorbents (ion-exchange materials) and special purpose photocatalysts based on titanium (IV) oxide with specified physical and chemical properties are described. It is shown that TiO2 is a unique object for solving theoretical and applied problems of ion exchange, adsorption and photocatalysis.

Keywords: titanium (IV) oxide sorbent ion exchanger, photocatalyst, water purification.

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07.04.2016 at 8:33 pm