Abstract
The adsorption of hexadecyltrimethylammonium (HDTMA) in smectite was studied by adsorption isotherms, X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). Smectites that had reacted for 48 h with HDTMA cations equivalent to 0.2–3.0 times the cation exchange capacity (CEC) were converted to HDTMA-exchanged smectites with various d-spacings. Study of HDTMA-smectites by HRTEM suggests that the HDTMA adsorption results in interlayer expansion with various d-spacings and irregular wavy layer structures. We believe that HDTMA loading beyond the CEC of smectite affects the structure of clay by the additional adsorption of HDTMA-Br− via hydrophobic bonding. Surfactant orientation probably depends on the quantity of surfactant in the interlayer. Our TEM study shows that the structure of the adsorbed HDTMA layer in the interlayers of smectite depends on the charge distribution and chemical composition of smectite.
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Ahn, J.H. and Peacor, D.R. (1986) Transmission electron microscope data for rectorite: implications for the origin and structure of ‘fundamental particles’. Clays and Clay Minerals, 34, 180–186.
Banfield, J.F. and Eggleton, R.A. (1988) Transmission electron microscope study of biotite weathering. Clays and Clay Minerals, 36, 47–60.
Bohmer, M.R. and Koopal, L.K. (1992) Adsorption of ionic surfactants on variable-charge surfaces. 1. Charge effects and structure of the adsorbed layer. Langmuir, 8, 2649–2659.
Boyd, S.A., Mortland, M.M. and Chiou, C.T. (1988) Sorption characteristics of organic compounds on hexadecyltrimethylammonium-smectite. Soil Science Society of America Journal, 52, 652–657.
Brindley, G.W. and Hoffmann, R.W. (1962) Orientation and packing of aliphatic chain molecules on montmorillonite. Clays and Clay Minerals, 9, 546–556.
Brixie, J.M. and Boyd, S.A. (1994) Treatment of contaminated soils with organoclays to reduce leachable pentachlorophenol. Journal of Environmental Quality, 23, 1283–1289.
Cases, J.M. and Villieras, F. (1992) Thermodynamic model of ionic and nonionic surfactant adsorption-abstraction on heterogeneous surfaces. Langmuir, 8, 1251–1264.
Cetin, K. and Huff, W.D. (1995) Characterization of untreated and alkylammonium ion exchanged illite/smectite by high resolution transmission electron microscopy. Clays and Clay Minerals, 43, 337–345.
Chen, Y.L., Chen, S., Frank, C. and Israelachvili, J. (1992) Molecular mechanisms and kinetics during the self-assembly of surfactant layers. Journal of Colloid and Interface Science, 153, 244–265.
Guthrie, G.D. and Veblen, D.R. (1990) Interpreting one-dimensional high-resolution transmission electron micrographs of sheet silicates by computer simulation. American Mineralogist, 75, 276–288.
Hendershot, W.H. and Duquette, M. (1986) A simple barium chloride method for determining cation exchange capacity and exchangeable cations. Soil Science Society of America Journal, 50, 605–608.
Israelachvili, J.N. (1991) Intermolecular and Surface Forces, 2nd edition. Academic Press, San Diego, California, 450 pp.
Lagaly, G. and Weiss, A. (1969) Determination of the layer charge in mica-type layer silicates. Proceedings of the International Clay Conference, Tokyo (L. Heller, editor). Israel University Press, Jerusalem, 61–80.
Lagaly, G. (1994) Layer charge determination by alkylammonium ions. Pp. 2–46 in: Layer Charge Characteristics of 2:1 Silicate Clay Minerals (A.R. Mermut, editor). The Clay Minerals Society, Boulder, Colorado.
Laird, D.A. (1994) Evaluation of the structural formula and alkylammonium methods of determining layer charge. Pp. 80–103 in: Layer Charge Characteristics of 2:1 Silicate Clay Minerals (A.R. Mermut, editor). The Clay Minerals Society, Boulder, Colorado.
Lee, J.F., Crum, J. and Boyd, S.A. (1989) Enhanced retention of organic contaminants by soils exchanged with organic cations. Environmental Science and Technology, 23, 1365–1372.
Lee, J.H. and Peacor, D.R. (1986) Expansion of smectite by laurylamine hydrochloride: ambiguities in transmission electron microscope observations. Clays and Clay Minerals, 34, 69–73.
Li, Z. and Bowman, R.S. (1997) Counterion effects on the sorption of cationic surfactant and chromate on natural clinoptilolite. Environmental Science and Technology, 31, 2407–2412.
Marcks, C.H., Wachsmuth, H. and Reichenbach, H.V. (1989) Preparation of vermiculites for HRTEM. Clay Minerals, 24, 23–32.
Mortland, M.M., Shaobai, S. and Boyd, S.A. (1986) Clay-organic complexes as adsorbents for phenol chlorophenols. Clays and Clay Minerals, 34, 581–585.
Rosen, M.J. (1989) Surfactants and Interfacial Phenomena. John Wiley & Sons, New York, 431 pp.
Smith, J.A., Jaffe, P.R. and Chiou, C.T. (1990) Effect of ten quaternary ammonium cations on tetrachloromethane sorption to clay from water. Environmental Science and Technology, 24, 1167–1172.
Theng, B.K.G. (1974) The Chemistry of Clay-Organic Reactions. Adam Hilger, London, 343 pp.
Vali, H. and Köster, H.M. (1986) Expanding behaviour, structural disorder, regular and random irregular interstratification of 2:1 layer-silicates studied by high-resolution images of transmission electron microscopy. Clay Minerals, 21, 827–859.
Xu, S. and Boyd, S.A. (1995) Cationic surfactant adsorption by swelling and non-swelling layer silicates. Langmuir, 11, 2508–2514.
Zhang, Z.Z., Sparks, D.L. and Scrivner, N.C. (1993) Sorption and desorption of quaternary amine cations on clays. Environmental Science and Technology, 27, 1625–1631.
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Lee, S.Y., Kim, S.J. Expansion of smectite by hexadecyltrimethylammonium. Clays Clay Miner. 50, 435–445 (2002). https://doi.org/10.1346/000986002320514163
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DOI: https://doi.org/10.1346/000986002320514163