Abstract
The effect of base treatment on the cation exchange capacity (CEC) of pillared clays and their adsorption isotherms for Cu2+, Cr3+ and Pb2+ have been investigated. Results indicate that although the CEC of pillared clays are only about 15% of that of the parent clays, a large fraction of the native clays CEC may be recovered by treatment with base. The fraction of the CEC recovered depends upon the base strength, its concentration, and the temperature. Contrary to previous suggestions the mechanism of recovery is related to the destruction of pillars which is accompanied by the loss of surface area. It is possible under conditions specified to prepare these base treated pillared clays as a new class of useful, regenerable adsorbent for heavy metal adsorption from aqueous solution.
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Baksh, M.S., E.S. Kikkinides, and R.T. Yang, “Characterization by Physisorption of a New Class of Microporous Adsorbent: Pillared Clays,” Ind. Eng. Chem. Res., 31, 2181–2189 (1992).
Baksh, M.S.A. and R.T. Yang, “Unique Adsorption Properties and Potential Energy Profiles of Microporous Pillared Clays,” AIChE J., 38(9), 1357–1368 (1992).
Barley, G.J.J., “Zirconium Pillared Clays,” Catalysis Today, Pillared Clays, Catalysis Today, R. Burch (Ed.), Vol. 2, pp. 233–241, Elsevier, New York, 1988.
Boer, J.J., B.C. Lippens, B.G. Linsen, J.C.P. Broekhoff, A. van den Heuvel, and Th.J. Osinga, “The t-Curve of Multimolecular N2-Adsorption,” J. Colloid Interface Sci., 21, 405–414 (1966).
Burch, R. (Ed.), Pillared Clays, Catalysis Today, Vol. 2, Elsevier, New York (1988).
Burch, R. and C.I. Warburton, “Zr-Containing Pillared Interlayer Clays,” J. Catal., 97, 503–510 (1986).
Busenberg, E. and C. V. Clemency, “Determination of the Cation Exchange Capacity of Clays and Soils Using an Ammonia Electrode,” Clays Clay Miner., 21, 213–217 (1973).
Carrera, L.M., S.G.P. Bosch, and S. Bulbulian, “Removal of 60Co by Zeolites and Clays,” Zeolites, 13, 622–625 (1993).
Cheng, L.S. and R.T. Yang, “A New Class of Non-Zeolitic Sorbents for Air Separation: Lithium Ion Exchanged Pillared Clays,” Ind. Eng. Chem. Res., 34(6), 2021–2028 (1995).
Farrah, H. and W.F. Pickering, “pH Effects in the Adsorption of Heavy Metal Ions by Clays,” Chemical Geology, 25, 317–326 (1979).
Figueras, F., A. Mattrod-Baksi, G. Fetter, A. Thrierr, and J.V. Zanchetta, “Preparation and Thermal Properties of Zr-Intercalated Clays,” J. Catal., 119, 91–96 (1989).
Figureas, F., “Pillared Clays as Catalysts,” Catal. Rev. Sci. Eng., 30(3), 457–499 (1988).
Ge, A., D. Li, and T.J. Pinnavaia, “Preparation of Alumna-Pillared Montmorillonite with High Thermal Stability, Regular Microporosity and Lewis/Brönsted Acidity,” Microporous Mater., 3, 165–175 (1994).
He, M., Z. Liu, and E. Min, “Acidic and Hydrocarbon Catalytic Properties of Pillared Clay,” Catalysis Today, R. Burch (Ed.), vol. 2, pp. 321–338, Elsevier, New York, 1988.
Malla, P.B. and S. Komameni, “Synthesis of Highly Microporous and Hydrophilic Alumna-Pillared Montmorillonite: Water-Sorption Properties,” Clays Clay Miner., 38(4), 363–372 (1990).
Molinard, A., P. Cool, and E.F. Vansant, “Physicochemical Properties of Ammonia-Adsorbed Alumina-Pillared Montmorillonite and Structural Aspects of Deammoniation Process,” Microporous Mater., 3, 149–158 (1994a).
Molinard, A., K.K. Peters, and E.F. Vansant, “Restoring the Cation Exchange Capacity of Alumna Pillared Montomorillonite through Modification with Ammonium,” Separation Technology, E.F. Vansant (Ed.), pp. 445–454, Elsevier Science B.V., Amsterdam, 1994b.
Molinard, A. and E.F. Vansant, “Gas Adsorption Properties of Cation Modified Alumina Pillared Montmorillonite,” Separation Technology, E.F. Vansant (Ed.), pp. 423–436, Elsevier Science B.V., Amsterdam, 1994.
Molinard, A. and E.F. Vansant, “Controlled Gas Adsorption Properties of Various Pillared Clays,” Adsorption, 1, 49–59 (1995).
Occelli, M.L. and R.M. Tindwa, “Physicochemical Properties of Montmorillonite Interlayered with Cationic Oxyaluminum Pillars,” Clays Clay Miner., 31(1), 22–28 (1983).
Pinnavaia, T.J., “Intercalated Clay Catalysts,” Science, 220, 365–371 (1983).
Vaughan, D.E.W., “Pillared Clays-A Historical Perspective,” Pillared Clays, Catalysis Today, R. Burch (Ed.), Vol. 2, pp. 187–198, Elsevier, New York, 1988.
Vaughan, D.E.W., R.J. Lussier, and J.S. Magee, “Pillared Interlayered Clay Product,” U.S. Patent 4,176,043, 1981.
Yamanaka, S., P.B. Malla, and S. Komameni, “Water Adsorption Properties of Alumina Pillared Clay,” J. Colloid Int. Sci., 134(1), 51–58 (1990).
Zhu, H., Z. Hu, N. Maes, and E.F. Vansant, “Correlation between the Micropore Structure and the Adsorption of Benzene in Pillared Clays,” Separation Technology, E.F. Vansant (Ed.), pp. 715–726, Elsevier Science B. V., Amsterdam, 1994.
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Li, D., Scala, A.A. & Ma, Y.H. Adsorption and characteristics of base-treated pillared clays. Adsorption 2, 227–235 (1996). https://doi.org/10.1007/BF00128304
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DOI: https://doi.org/10.1007/BF00128304