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Abstract:

Since characteristic Patagonian soils have low amounts of organic matter (usually less than 1%) and high clay contents, the relative contribution of minerals to sorption of hydrophobic organic solutes may become significant. The purpose of the present study was to examine the interactions between oil and soil for an extended range of concentrations (1 to 400 mgL-1). The prediction of isotherms by a multilayer sorption model was examined by studying the behavior of pure compounds and mixtures of known chemical composition. It was found that the extent of sorption is strongly dependent on the nature of the different interactions between sorbent and sorbates. The difference between the predicted and experimental oil isotherms was calculated to be only 13%, which indicates the reliability of the model. Not a simple dependence with the interaction forces was found to be responsible for the applicability of the model. Other factors such as 3-D arrangements and molecular sizes should be considered. The estimations of the surface area of the soil with pyridine and phenanthrene are consistent with the sorption behavior of the polar and nonpolar sorbates in vapor phase. It was found that that crude oil is more sorbed than the sum of its fractions (aliphatic, aromatic, and polar), and this could be likely due to the asphaltenes present in the crude oil that have a stronger sorption behavior. The results observed for the different oil fractions, compared with those of the pure compounds studied in this article, are consistent with competitive interactions of the different chemical species for accessing to active sites. The determined parameters could be useful for the design of remediation techniques. Copyright © Taylor & Francis, Inc.

Registro:

Documento: Artículo
Título:Multilayer sorption model for the interactions between crude oil and clay in Patagonian soils
Autor:Ríos, S.M.; Nudelman, N.S.
Filiación:Department of Chemistry, Facultad de Ciencias Naturales, Univ. Nac. Patagonia San Juan Bosco, Comodoro Rivadavia, Chubut, Argentina
Department of Organic Chemistry, Facultad de Cie. Exactas/Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Clay; Composition; Flow interactions; Hydrophobicity; Isotherms; Multilayers; Soils; Sorption; Molecular size; Solutes; Surface area; Vapor phase; Crude petroleum; crude oil
Año:2005
Volumen:26
Número:1
Página de inicio:19
Página de fin:25
DOI: http://dx.doi.org/10.1081/DIS-200040228
Título revista:Journal of Dispersion Science and Technology
Título revista abreviado:J. Dispersion Sci. Technol.
ISSN:01932691
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01932691_v26_n1_p19_Rios

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Citas:

---------- APA ----------
Ríos, S.M. & Nudelman, N.S. (2005) . Multilayer sorption model for the interactions between crude oil and clay in Patagonian soils. Journal of Dispersion Science and Technology, 26(1), 19-25.
http://dx.doi.org/10.1081/DIS-200040228
---------- CHICAGO ----------
Ríos, S.M., Nudelman, N.S. "Multilayer sorption model for the interactions between crude oil and clay in Patagonian soils" . Journal of Dispersion Science and Technology 26, no. 1 (2005) : 19-25.
http://dx.doi.org/10.1081/DIS-200040228
---------- MLA ----------
Ríos, S.M., Nudelman, N.S. "Multilayer sorption model for the interactions between crude oil and clay in Patagonian soils" . Journal of Dispersion Science and Technology, vol. 26, no. 1, 2005, pp. 19-25.
http://dx.doi.org/10.1081/DIS-200040228
---------- VANCOUVER ----------
Ríos, S.M., Nudelman, N.S. Multilayer sorption model for the interactions between crude oil and clay in Patagonian soils. J. Dispersion Sci. Technol. 2005;26(1):19-25.
http://dx.doi.org/10.1081/DIS-200040228