Modification of Silicas and Their Investigation by Dye Adsorption

Author:

Khokhlova T.D.1,Nikitin Yu.S.1,Detistova A.L.1

Affiliation:

1. Laboratory of Adsorption and Chromatography, Chemical Department, Lomonosov State University of Moscow, 119899 Moscow, Russia

Abstract

Various silicas (silica gel, silochrome, alumosilica, Aerosil and quartz) were modified by dehydroxylation, calcium hydroxide, aluminium chloride and organosilanes with hydrophobic and aminopropyl groups. The surface characteristics of the modified materials were evaluated by means of basic and acid dye adsorption from aqueous solution. The degree of modification, the hydrolytic stability of the organosilyl silicas and the rehydroxylation rate of the dehydroxylated silicas were determined via the kinetics of dye adsorption and their respective isotherms.

Publisher

Hindawi Limited

Subject

Surfaces and Interfaces,General Chemical Engineering,General Chemistry

Reference7 articles.

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