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Title of article :
Cu (II) removal from tequila using an ion-exchange resin
Author/Authors :
Carreon-Alvarez، نويسنده , , Alejandra and Herrera-Gonzalez، نويسنده , , Azucena and Casillas، نويسنده , , Norberto and Prado-Ramirez، نويسنده , , Rogelio and Estarron-Espinosa، نويسنده , , Mirna and Soto، نويسنده , , Victor and de la Cruz، نويسنده , , Wencel and Barcena-Soto، نويسنده , , Maximiliano and Gomez-Salazar، نويسنده , , Sergio، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
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Abstract :
An ion-exchange resin was employed to remove copper from tequila. Elemental analysis, batch and column copper uptake measurements were performed to assess the extent of metal removal; FTIR and XPS were employed to elucidate the copper complexes formed on the surface of resin; GC was used to investigate resin fouling and the extent of methanol removal. A modified Langmuir isotherm was used to explain adsorption equilibrium data. A ligand density of 2.21 mmol/g as sulphonic group, was measured. Maximum copper uptake by resin was 0.59 mmol/g. GC results from column experiments revealed methanol changes from 311 mg/100 ml anhydrous alcohol (AA) to 212 mg/100 ml AA, complying with Mexican regulations. Tequila solution with copper (5.3 l, 7.3 mg/l) was treated to breakthrough point in column experiments reaching 0.5 mg/l of copper at effluent. These results comply with the Mexican regulation for copper concentration (⩽2 mg/l) showing the promise of resin for industrial applications in removal of copper and methanol from tequila.
Keywords :
Alcoholic beverage , Tequila , Copper , Sulphonic , Adsorption
Journal title :
Food Chemistry
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