Title

Size-selective extraction of polycyclic aromatic hydrocarbons from a microemulsion system using cyclodextrins

Document Type

Article

Publication Date

3-15-1993

Abstract

A procedure for the size-selective extraction of polycyclic aromatic hydrocarbons (PAHs) from an oil-in-water microemulsion system is reported. This extraction is achieved through a precipitation/extraction process involving cyclodextrins (CDs) and select PAHs in the microemulsion. Results are confirmed by fluorescence analysis of supernatant and precipitate. The size relationship between the PAH and CD cavity appears to be a major factor in the selectivity of the process. For example, after extraction with β-CD, the fluorescence intensity of naphthalene in the microemulsion is reduced to 3.7% of its original value, whereas with α- or γ-CD the intensity remains unchanged. In studies of a model system, the microemulsion involves a three-component mixture of PAHs; α-, β-, and γ-CD are investigated for their extraction capabilities for these three PAHs. © 1993 Academic Press, Inc.

Publication Source (Journal or Book title)

Journal of Colloid And Interface Science

First Page

359

Last Page

364

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