Tkachenko O. Sorption and complexing equilibria at the surface of nitrogen containing weakly and strongly basic organo-silica anion exchangers.

The thesis is devoted to the investigation of the physico-chemical characteristics of sorption processes at the surface of weakly and strongly basic nitrogen containing organo-silica anion exchangers. A new procedure for the reliable simultaneous determination of the parameters of adsorption equilibria has been elaborated. The adsorption equilibria of heavy metal chlorides by the strongly basic nitrogen containing organo-silica anion exchangers have been simulated with take into account complexation equilibria in solutions. It was shown that the adsorption of anionic dyes by hybrid silica-organic materials with immobilized basic nitrogen groups occurs according to the ionic exchange mechanism. The electrode based on ormosil with surface complexes of immobilized amino groups and Cu (II) has been prepared for electrochemical determination of nitrite-ions. The procedure for the determination of nitrite ions in water has been developed.