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Intercalation and Surface Modification of Smectite by Two Non-Ionic Surfactants

Published online by Cambridge University Press:  01 January 2024

Youjun Deng ,
Joe B. Dixon  and
G. Norman White
Youjun Deng
Affiliation:
Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas, 77843-2474, USA
Joe B. Dixon*
Affiliation:
Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas, 77843-2474, USA
G. Norman White
Affiliation:
Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas, 77843-2474, USA
*
*E-mail address of corresponding author: [email protected]
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Abstract

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Non-ionic surfactants Brij 56 and Igepal CO 720, containing hydrophilic poly(ethylene oxide) (PEO) segments, expanded smectite from 1.5 nm to 1.7 nm at room temperature. The surfactant-smectite composites had larger layer spacings than Ca-smectite after heat treatment. The surfactant-smectite composites were solvated and expanded to 1.8–1.9 nm by polar solvents, glycerol and water, but were not affected by the non-polar or weakly polar solvents, toluene, hexane or octanol. The hydrophilic PEO segments of non-ionic surfactants would logically access the interlayer spaces of smectite whereas the hydrophobic segments extend away from the mineral. The molecular structure and solvation properties suggest that the surfactant molecules are probably concentrated in the margin area of the interlayer galleries forming an annular ring structure between two neighboring silicate sheets. Only two layers or less of the surfactants could access the interlayer galleries of smectite and layer spacings did not exceed 1.8 nm even where excess surfactant was introduced into the composites. The layer spacings of the surfactant-smectite composites were well preserved during water or electrolyte solution washings, indicating stability of most non-ionic surfactant molecules in the interlayer galleries even though ∼30% of the adsorbed Igepal CO 720 was desorbed by exhaustive washing. The non-ionic surfactant treatment preserved >80% of the CEC of the smectite. The interlayer cations of the resulting surfactant-smectite were exchangeable as in the untreated smectite. Therefore, the non-ionic surfactant-smectite was much more efficient at removing heavy metal ions than activated carbon or cationic surfactant-treated smectite. The surfactant-smectite composites effectively removed aromatic chlorophenols from a pH 4.9 acetate buffer solution while untreated smectite did not adsorb these molecules. The enhanced adsorption of the aromatic compounds is attributed to the aliphatic segments of the two surfactants.

Keywords

Brij 56ChlorophenolIgepal CO 720IntercalationNon-ionic SurfactantOrgano-claySmectiteSurface PropertiesPoly(ethylene oxide)
Type
Research Article
Information
Clays and Clay Minerals , Volume 51 , Issue 2 , April 2003 , pp. 150 - 161
Copyright
Copyright © 2003, The Clay Minerals Society

References

Alther, G.R., (1998) The missing link Industrial Wastewater 101 27 30.Google Scholar
Alther, G.R. (1998b) Wastewater treatment: On- or off-site? Environmental Protection, (January), 19–23.Google Scholar
Boyd, S.A. Mortland, M.M. and Chiou, C.T., (1988) Sorption characteristics of organic compounds on hexadecyltrimethyl ammonium-smectite Soil Science Society of America Journal 52 652–657 10.2136/sssaj1988.03615995005200030010x.Google Scholar
Breen, C. Thompson, G. and Webb, M., (1999) Preparation, thermal stability and decomposition routes of clay/Triton-X100 composites Journal of Materials Chemistry 9 3159–3165 10.1039/a907860f.Google Scholar
Carter, D.L. Mortland, M.M. Kemper, W.D. and Klute, A., (1986) Specific surface Methods of Soil Analysis. Part 1. Physical and Mineralogical Methods 2nd Madison, Wisconsin American Society of Agronomy, Inc., Soil Science Society of America, Inc. 413 423.Google Scholar
Cross, J., (1987) Non-ionic Surfactants: Chemical Analysis New York Marcel Dekker, Inc. 417 pp.Google Scholar
Deng, Y. Dixon, J.B., Dixon, J.B. and Schulze, D.G., (2002) Soil organic matter and organic-mineral interactions Soil Mineralogy with Environmental Applications Madison, Wisconsin Soil Science Society of America, Inc. 69 107.Google Scholar
Gullick, R.W. Weber, W.J. Jr Gray, D.H. and Sawhney, B.L., (1996) Organic contaminant transport through clay liners and slurry walls Organic Pollutants in the Environment Boulder, Colorado The Clay Minerals Society 95 136.Google Scholar
Harper, M. and Purnell, C.J., (1990) Alkylammonium montmorillonites as adsorbents for organic vapors from air Environmental Science and Technology 24 55–62 10.1021/es00071a004.Google Scholar
Hermosin, M.C. and Cornejo, J., (1993) Binding mechanism of 2,4-dichlorophenoxyacetic acid by organo-clays Journal of Environmental Quality 22 325–331 10.2134/jeq1993.00472425002200020013x.Google Scholar
Jackson, M.L., (1969) Soil Chemical Analysis — Advanced Course Madison, Wisconsin Department of Soils, University of Wisconsin.Google Scholar
Jaynes, W.F. and Boyd, S.A., (1991) Clay mineral type and organic compound sorption by hexadecyltrimethylammonium-exchanged clays Soil Science Society of America Journal 55 43–48 10.2136/sssaj1991.03615995005500010007x.Google Scholar
Koh, S.-M. and Dixon, J.B., (2001) Preparation and application of organo-minerals as sorbents of phenol, benzene and toluene Applied Clay Science 18 111–122 10.1016/S0169-1317(00)00040-5.Google Scholar
Lan, T. and Pinnavaia, T.J., (1994) Clay-reinforced epoxy nanocomposites Chemistry of Materials 6 2216–2219 10.1021/cm00048a006.Google Scholar
Li, J. Smith, J.A. and Winquist, A.S., (1996) Permeability of earthen liners containing organobentonite to water and two organic liquids Environmental Science and Technology 30 3089–3093 10.1021/es960172p.Google Scholar
Michot, L.J. and Pinnavaia, T.J., (1991) Adsorption of chlorinated phenols from aqueous solution by surfactant-modified pillared clays Clays and Clay Minerals 39 634–641 10.1346/CCMN.1991.0390609.Google Scholar
Mortland, M.M., Huang, P.M. and Schnitzer, M., (1986) Mechanisms of adsorption of non-humic organic species by clays Interactions of Soil Minerals with Natural Organics and Microbes Madison, Wisconsin Soil Science Society of America, Inc. 59 76.Google Scholar
Mortland, M.M. Shaobai, S. and Boyd, S.A., (1986) Clay-organic complexes as adsorbents for phenol and chlorophenols Clays and Clay Minerals 34 581–585 10.1346/CCMN.1986.0340512.Google Scholar
Parfitt, R.L. and Greenland, D.J., (1970) Adsorption of poly(ethylene glycols) on clay minerals Clay Minerals 8 305–315 10.1180/claymin.1970.008.3.08.Google Scholar
Portet, F. Desbene, P.L. and Treiner, C., (1997) Adsorption isotherms at a silica/water interface of the oligomers of polydispersed nonionic surfactants of the alkylpolyoxyethylated series Journal of Colloid and Interface Science 194 379–391 10.1006/jcis.1997.5113.Google Scholar
Portet, F. Desbene, P.L. and Treiner, C., (1998) Polydispersity of a non-ionic surfactant as related to its adsorption characteristics on porous silica particles in water Journal of Colloid and Interface Science 208 415–421 10.1006/jcis.1998.5851.Google Scholar
Rheinlander, T. Klumpp, E. and Schwuger, M.J., (1998) On the adsorption of hydrophobic pollutants on surfactant/clay complexes: comparison of the influence of a cationic and a nonionic surfactant Journal of Dispersion Science and Technology 19 379–398 10.1080/01932699808913181.Google Scholar
Sheng, G. Xu, S. and Boyd, S.A., (1999) A dual function organoclay sorbent for lead and chlorobenzene Soil Science Society of America Journal 63 73–78 10.2136/sssaj1999.03615995006300010012x.Google Scholar
Shi, H. Lan, T. and Pinnavaia, T.J., (1996) Interfacial effects on the reinforcement properties of polymer-organoclay nanocomposites Chemistry of Materials 8 1584–1587 10.1021/cm960227m.Google Scholar
Slabaugh, W.H. and Hiltner, P.A., (1968) The swelling of alkylammonium montmorillonites The Journal of Physical Chemistry 72 4295–4298 10.1021/j100858a060.Google Scholar
Smith, J.A. and Jaffe, P.R., (1994) Benzene transport through landfill liners containing organophilic bentonite Journal of Environmental Engineering — ASCE 120 1559–1577 10.1061/(ASCE)0733-9372(1994)120:6(1559).Google Scholar
White, J.L. Roth, C.B. and Klute, A., (1986) Infrared Spectrometry Methods of Soil Analysis. Part 1. Physical and Mineralogical Methods 2nd Madison, Wisconsin American Society of Agronomy, Inc., Soil Science Society of America, Inc. 291 330.Google Scholar
Xu, S. and Boyd, S.A., (1994) Cation exchange chemistry of hexadecyltrimethylammonium in a subsoil containing vermiculite Soil Science Society of America Journal 58 1382–1391 10.2136/sssaj1994.03615995005800050015x.Google Scholar
Xu, S. and Boyd, S.A., (1995) Alternative model for cationic surfactant adsorption by layer silicates Environmental Science and Technology 29 3022–3028 10.1021/es00012a020.Google Scholar
Xu, S. and Boyd, S.A., (1995) Cationic surfactant adsorption by swelling and nonswelling layer silicates Langmuir 11 2508–2514 10.1021/la00007a033.Google Scholar