Hostname: page-component-848d4c4894-8bljj Total loading time: 0 Render date: 2024-06-20T05:05:14.908Z Has data issue: false hasContentIssue false
  • English
  • Français

FTIR Study of Competitive Water-Arene Sorption on Tetramethylammonium- and Trimethylphenylammonium-Montmorillonites

Published online by Cambridge University Press:  28 February 2024

Jeffrey J. Stevens ,
Sharon J. Anderson  and
Stephen A. Boyd
Jeffrey J. Stevens
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan 48824
Sharon J. Anderson
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan 48824
Stephen A. Boyd
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan 48824
Get access Rights & Permissions [Opens in a new window]

Abstract

Montmorillonites saturated with small quaternary alkylammonium ions such as tetramethyl-ammonium (TMA) or trimethylphenylammonium (TMPA) are excellent sorbents for aromatic pollutants. In some cases, water inhibits arene sorption, but the inhibition mechanism is not understood completely. The objectives of this study were to determine whether arenes interact with adsorbed TMA and TMPA ions and/or with siloxane surfaces, and how water affects these interactions. We reacted benzene and ethylbenzene vapors with normal- and reduced-charge TMA- and TMPA-montmorillonite films at several relative humidities, and obtained infrared spectra of the resulting sorbate-clay complexes. Arene sorption caused the methyl asymmetric deformation vibrations adsorbed TMA and TMPA to shift to lower wave-number, whereas water sorption caused shifts to higher wavenumber. In the absence of water, benzene and ethylbenzene adsorbed on the siloxane surface as well as interacted directly with TMA and TMPA ions. The proportion of TMA and TMPA ions that interacted with benzene and ethylbenzene was greater for reduced-charge than normal-charge montmorillonite. Comparison of the HOH deformation and cation methyl asymmetric deformation vibrations indicated that both benzene and ethylbenzene inhibited water sorption substantially, and that water more readily displaced benzene and ethylbenzene from TMA and TMPA ions than from siloxane surfaces. Water inhibited arene sorption mainly by hydrating exchangeable cations, thereby obscuring siloxane surfaces adjacent to adsorbed TMA and TMPA ions and decreasing the average pore dimensions. These results indicate that in the presence of bulk water, arene adsorption likely occurs primarily on the siloxane surface.

Keywords

AlkylammoniumBenzeneEthylbenzeneInfrared spectroscopyOrganoclaySorptionWater
Type
Research Article
Information
Clays and Clay Minerals , Volume 44 , Issue 1 , February 1996 , pp. 88 - 95
Copyright
Copyright © 1996, The Clay Minerals Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Boyd, S.A., Jaynes, W.F. and Ross, B.S.. 1991. Immobilization of organic contaminants by organo-clays: Application to soil restoration and hazardous waste containment. In: Baker, R.S., editor. Org Substances and Sediments in Water, Vol. 1. Boca Raton, FL: CRC Press. 181–372.Google Scholar
Brindley, G.W. and Ertem, G.. 1971. Preparation and solvation properties of some variable charge montmorillonites. Clays & Clay Miner 19: 399–404.CrossRefGoogle Scholar
Doner, H.E. and Mortland, M.M.. 1969. Benzene complexes with copper(II) montmorillonite. Science 166: 1406–1407.CrossRefGoogle ScholarPubMed
Duinker, J.C. and Mills, I.M.. 1968. Normal coordinates for the planar vibrations of benzene. Spectrochim Acta 24A: 417–435.CrossRefGoogle Scholar
Green, J.H.S.. 1962. Vibrational spectra of benzene derivatives—III. Anisole, ethylbenzene, phenetole methyl phenyl sulphide and ethyl phenyl sulphide. Spectrochim Acta 18: 39–50.CrossRefGoogle Scholar
Greene-Kelly, R.. 1953. The identification of montmorillonoids in clays. J Soil Sci 4: 233–237.CrossRefGoogle Scholar
Jaynes, W.F. and Bigham, J.M.. 1987. Charge reduction, octahedral charge, and lithium retention in heated, Li-saturated smectites. Clays & Clay Miner 35: 440–448.CrossRefGoogle Scholar
Jaynes, W.F. and Boyd, S.A.. 1990. Trimethylphenylammonium-smectite as an effective adsorbent of water soluble aromatic hydrocarbons. J Air Waste Management Assoc 40: 1649–1653.CrossRefGoogle ScholarPubMed
Jaynes, W.F. and Boyd, S.A.. 1991. Hydrophobicity of siloxane surfaces in smectites as revealed by aromatic hydrocarbon adsorption from water. Clays & Clay Miner 39: 428–436.CrossRefGoogle Scholar
Lee, J.F., Mortland, M.M., Chiou, C.T., Kile, D.E. and Boyd, S.A.. 1990. Adsorption of benzene, toluene, and xylene by two tetra-methylammonium-smectites having different charge densities. Clays & Clay Miner 38: 113–120.CrossRefGoogle Scholar
Mortland, M.M. and Pinnavaia, T.J.. 1971. Formation of copper(II) arene complexes on the interlamellar surfaces of montmorillonite. Nature Phys Sci 229: 75–77.CrossRefGoogle Scholar
Stevens, J.J. and Anderson, S.J.. 1996b. Orientation of the phenyl group of trimethylphenylammonium on normal- and reduced-charge Wyoming montmorillonite. Clays & Clay Miner 44: 132–141.CrossRefGoogle Scholar
Stevens, J.J. and Anderson, S.J.. 1996c. An FTIR study of water sorption on tetramethylammonium- and trimethylphenyl-ammonium-saturated normal- and reduced-charge Wyoming montmorillonite. Clays & Clay Miner 44: 142–150.CrossRefGoogle Scholar
Varsányi, G.. 1969. Vibrational Spectra of Benzene Derivatives. New York and London: Academic Press. 430 pp.Google Scholar
Weast, R.C., editor. 1986. CRC Handbook of Chemistry and Physics 67th ed. Boca Raton, Florida: CRC Press, Inc. D189–D212.Google Scholar