CAMELIA LUCHIAN, MARIUS NICULAUA, VALERIU V. COTEA, NICOLAE BILBA, VIOLETA COPCIA, ANDREI VICTOR SANDU<br>Adsorption of Phenolic Compounds from Wine on Mesoporous MCM-41 Molecular Sieve

CAMELIA LUCHIAN, MARIUS NICULAUA, VALERIU V. COTEA, NICOLAE BILBA, VIOLETA COPCIA, ANDREI VICTOR SANDU
Adsorption of Phenolic Compounds from Wine on Mesoporous MCM-41 Molecular Sieve

Abstract:

Mesoporous silica-MCM-41 molecular sieve was synthesized following a hydrothermal synthesis route using tetraethylorthosilicate as silica source, cethyltrimethylammonium bromide as surfactant (structure-directing agent) and ammonium hydroxide as mineralizing agent. This mesoporous material exhibits a type IV nitrogen adsorption-desorption isotherm, has a specific surface area of 1170 m2/g, a total pore volume of 0.91 cm3/g and cylindrical pores of an average diameter of 2.67 nm. The adsorption properties of the calcined mesoporous silica MCM-41 material, as a consequence of the presence of single and geminal silanol groups that are active sites for adsorption were evaluated in the clarification process of red wine. The total polyphenols content (reduction), the selectivity and stabilization for some compounds (phenolic acids, catechin, epicatechin, stilbenes) and the chromatic characteristics of wine (no modification) were investigated. The use of mesoporous silica MCM-41 molecular sieve in red wine treatment is feasible, softer and ecological. Keywords: MCM-41, phenolic compounds, adsorption

Issue: 2011, Volume 62, Issue 3

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