The Influence Of Surface Chemistry Of Synthetic Sorption Materials On Deriving By Its Modified

Category: VI Ukrainian-Polish Symposium

THE INFLUENCE OF SURFACE CHEMISTRY OF SYNTHETIC SORPTION MATERIALS ON DERIVING BY ITS MODIFIED

COPPER (11) FORMS

T.I. Denisova, D.I. Shvetz, T.A. Khalyavka

Institute for Sorption and Endoecology Problems, Ukrainian National Academy of Sciences, General Naumov st. 13, 03680 Kyiv, Ukraine

The comparative estimate of surface chemistry influence of various synthetic sorption materials [carbon fibrous sorbents, their oxidized forms (SEC 1,0 – 1,5 M-eqv/g) and organosilica polymers silico-polyorganosiloxanes] on peculiarities of their modification by ions of copper (11) from water solutions of salts and complexes is reduced.

Common at modification by ions of copper (11) of the investigated sorbents is 1) nonlinear nature of dependence of sorption by ions of copper (11) from its starting concentration and the amount of hydroxyl groups on a surface hydrophilic-hydrophobic organosilica and carbon fibrous: 2) greater contribution to summary magnitude of sorption of concentration of modifying agent both ratio of solid and liquid phase, than pH and amount of active hydroxyl centers on a surface of sorption materials.

Greater magnitude of sorption of copper (11) on carbon sorbents than on its oxidized forms, slight variation in sorption capacity at decrease of hydrophilic component in the composition of organosilica from 50 % mas. to 70 % mas and various time of attainment of sorption equilibrium in explored systems testify to contribution of peculiarities of surface chemistry of synthetic sorbents caused by the type of structural hydroxyl groups on its surface (isolated single, double and neighboring) on its sorption ability to ions of copper (11) in water solutions.

The influence of surface chemistry on the structural and sorptional characteristics of investigated sorbents at modification by iones of copper (11) is exhibited in symbatic variation of pH of surface zero charge and sorption volume of pores on water for the oxidized forms of carbon fibrous materials and silico-polymethylsiloxanes with silanol and metylsilyl groups ratio more than 50:50 % mas. It is shown also, that irrespective of the amount of copper (11) in composition of sorbents, modification results in antibatic change of sorption volume of pores on benzyl both water of carbon fibrous (increase) and its oxidized forms (decrease).



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