Abstract
The sorption of rutin on aluminum oxide from aqueous ethanol solutions is studied in the range of physiological pH values. It is found that sorption begins at pH >3 and reaches its maximum values in a neutral medium. It is established that the isotherm of rutin sorption belongs to the H-type, which is characteristic of chemisorption. It is shown that rutin is sorbed on aluminum oxide due to the interaction between a pair of hydroxyl and carbonyl groups alongside the undissociated ≡AlOH group, resulting in the formation of a chelate on the sorbent surface similar to the complex formed with Al(III) in solutions.
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