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T. D. Khokhlova
Adsorption of dyes on alumina
modified with oleine acid
Abstract
Adsorption of water-soluble
dyes on alumina modified with oleic (cis-9-octadecanoic) acid is investigated.
Content of the modifier on the alumina surface is 5,4 мmol/m2. Adsorption activity of the alumina is increased
greatly after its modification. Effects of pH, addition of neutral electrolyte
and organic solvent on adsorption of acid, basic and acid-basic dyes is
studied. The greatest adsorption of rhodamines B and 6G at pH 10, but of acid
orange at pH 2 is observed. Introduction of sodium chloride and isopropanol in
solution reduced adsorption of dyes. The role of ionic and hydrophobic
interactions in adsorption is considered.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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