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Selectivity of Heavy Metal Ions at Acidic Supramolecular Surfaces
Korean Journal of Chemical Engineering, November 1997, 14(6), 533-540(8), 10.1007/BF02706606
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Abstract
Langmuir monolayers containing surface carboxylic acid head groups were examined in order to characterize their selectivity to metal ion adsorption. Experimental data of ion adsorption obtained by surface isotherms and FTIR spectroscopy were analyzed using a thermodynamic-and-electrochemical model. Among bivalent ions examined (Cr2+, Pb2+, Cu2+, Cd2+, Zn2+, Ca2+, Ni2+, and Ba2+), Langmuir monolayers showed the highest selectivity to chromium ions. In addition, it was found that adsorption constants of the surface ions are quite different from binding constants of the bulk ions. The results show important implications to sensing and separating metal ions by the use of acidic supramolecular materials.
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Ahn DJ, Franses EI, J. Chem. Phys., 95, 8486 (1991)
Ahn DJ, Franses EI, J. Phys. Chem., 96, 9952 (1992)
Bloch JM, Yun WB, Yang X, Ramanathan M, Montano PA, Capasso C, Phys. Rev. Lett., 61, 2941 (1988)
Bloch JM, Yun W, Phys. Rev., A, 41, 844 (1990)
Choi JW, Min J, Lee WH, Korean J. Chem. Eng., 14(2), 101 (1997)
Colthup NB, Daly LH, Wiberley SE, "Introduction to Infrared and Raman Spectroscopy," 3rd ed., Academic Press, New York (1990)
Gaines GL, "Insoluble Monolayers at Liquid-Gas Interfaces," John Wiley & Sons, New York (1966)
Kim SR, Choi SA, Kim JD, Korean J. Chem. Eng., 13(1), 46 (1996)
Kimura F, Umemura J, Takenaka T, Langmuir, 2, 96 (1986)
Kobayashi K, Takaoka K, Ochiai S, Thin Solid Films, 159, 267 (1988)
Kurata M, "Thermodynamics of Polymer Solutions," Harwood Academic Press, New York (1982)
Marshbanks TL, Ahn DJ, Franses EI, Langmuir, 10(1), 276 (1994)
Ringsdorf H, Schlarb B, Venzmer J, Angew. Chem.-Int. Edit., 27, 113 (1988)
Roberts G, "Langmuir-Blodgett Films," Plenum Press, New York (1990)
Smith RM, Martell AE, "Critical Stability Constants," Plenum Press, New York (1989)
Stroeve P, Franses EI, "Molecular Engineering of Ultrathin Polymeric Films," Elsevier, London (1987)
Tredgold RH, "Order in Thin Organic Films," Cambridge Press, New York (1994)
Ulman A, "An Introduction to Ultrathin Organic Films: From Langmuir-Blodgett to Self-Assembly," Academic Press, New York (1991)
Yazdanian M, Yu H, Zografi G, Kim MW, Langmuir, 8, 630 (1992)
