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Type: Artigo de periódico
Title: Adsorption of crude oil on anhydrous and hydrophobized vermiculite
Author: da Silva, UG
Melo, MAD
da Silva, AF
de Farias, RF
Abstract: This publication reports the adsorption of crude oil on vermiculite samples, expanded and hydrophobized with carnauba (Copernicia Cerifera) wax. The adsorption studies were performed by using columns filled with the vermiculite matrices and by dispersion of the vermiculite samples in an oil-water (50 ppm of oil) emulsion. The hydrate vermiculite exhibits a very low adsorption capacity against crude oil. On the other hand, anhydrous (expanded) and hydrophobized matrices show a high adsorption capacity. The 10% hydrophobized matrix show a 50% increased adsorption capacity, in comparison with the expanded one. For adsorption performed in the water-oil emulsion, saturation of the solid hydrophobized matrix is achieved after 60 min. The hydrophobized samples exhibit adsorption factors in the 0.7-1.0 range. (C) 2003 Elsevier Science (USA). All rights reserved.
Subject: vermiculite
crude oil
Country: EUA
Editor: Academic Press Inc Elsevier Science
Citation: Journal Of Colloid And Interface Science. Academic Press Inc Elsevier Science, v. 260, n. 2, n. 302, n. 304, 2003.
Rights: fechado
Identifier DOI: 10.1016/S0021-9797(02)00160-1
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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