Persson, Ingmar
- Department of Molecular Sciences, Swedish University of Agricultural Sciences
Research article2022Peer reviewedOpen access
Sorption of Bisphenol A as Model for Sorption Ability of Organoclays
Garikoe, Issaka; Guel, Boubie; Persson, Ingmar
Abstract
The arrangement of bisphenol A molecules into organoclays and their interactions with the intercalated surfactant were studied. The organoclays were prepared via solid-state intercalation of four cationic surfactants, such as dodecyltrimethyl-, tetradecyltrimethyl-, hexadecyltrimethyl-, and didodecyldimethyl-ammonium, as bromide salts, at different loading levels into the interlayers of two natural clays. The natural clays, the prepared organoclays, and the spent organoclays were characterized by X-ray powder diffraction, infrared spectroscopy, and scanning electron microscopy. X-ray powder diffraction measurements showed successive interlayer expansions of the d(001) basal spacing due to the intercalation of the cationic surfactants and the bisphenol A sorption. The increased d(001) basal spacing of the organoclays after bisphenol A sorption indicates that the molecules are integrated between the alkyl chains of the surfactant in the organoclays interlayers. Infrared spectroscopy was employed to probe the intercalation of the cationic surfactants and the sorbed bisphenol A. New characteristic bands attributed to the bisphenol A phenol rings appear in the range 1518-1613 cm(-1) on the infrared spectra of the spent organoclays, proving the presence of bisphenol A in the hydrophobic interlayers. Scanning electron microscopy of the organoclays before and after BPA sorption shows that their morphology becomes fluffy and that the presence of the organic molecules expands the clay structure.
Keywords
smectite; organoclays; surfactant; intercalation; hydrophobicity; rearrangement; expansion; interaction; partitioning process; Ca-montmorillonite
Published in
Molecules (Basel, Switzerland)
2022, volume: 27, number: 14, article number: 4343
Publisher: MDPI
SLU Authors
UKÄ Subject classification
Biochemistry and Molecular Biology
Materials Chemistry
Publication identifier
- DOI: https://doi.org/10.3390/molecules27144343
Permanent link to this page (URI)
https://res.slu.se/id/publ/118594