Ionic liquid screening of Octachlorodibenzo-p-dioxin captured from water samples by σ-profile analysis for microextraction applications

Eduardo Ignacio Villarroel*, G. Merlet, F. Olea, C. Araya-López, T. Brouwer, R. Cabezas, J. Romero, B. Schuur, E. Quijada-Maldonado

*Corresponding author for this work

Research output: Contribution to journalReview articleAcademicpeer-review

8 Citations (Scopus)
61 Downloads (Pure)

Abstract

The extraction of octachlorodibenzo-p-dioxin (OCDD) is very challenging due to its highly non-polar nature, demanding the use of large amounts of toxic solvents. Ionic Liquids (ILs) for OCDD extraction were screened to replace traditional solvents using the Conductor-like Screening MOdel for Real Solvents (COSMO-RS). The analysis was performed by studying the �-profile of a variety of commercially available cations and anions employed in the literature. The effects of different alkyl chain lengths and configurations were studied in cations. In the case of anions, different reported structures, including fluorine- or oxygen-bearing structures, were assessed. Results indicate that the alkyl chain, symmetry, and nature of the central atom in the cations are critical factors to achieve high affinity to OCDD. The polarity of anions was found to be modified by adding highly electronegative atoms, a steric hindrance to the central atom and the use of planar geometries with symmetrical groups. The performance of ILs for extracting OCDD was compared with that of conventional solvent extractants used for quantifying dioxins in the US EPA-1613 method. Finally, three cations and anions are proposed as candidates for dioxin extraction.
Original languageEnglish
Article number100017
JournalJournal of Ionic Liquids
Volume2
Issue number1
Early online date17 Jan 2022
DOIs
Publication statusPublished - Jun 2022

Keywords

  • UT-Gold-D

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