Abstract
The effect of the surface conductance on the ζ-potential of dispersed particles determined from their electrophoretic mobility in nonaqueous electrolyte solutions was considered. The conductivity of dilute quartz suspensions and the electrophoretic mobility of quartz particles in NaBr solutions in butanol-1 and dimethyl sulfoxide as well as in LiBr solutions in acetone at the salt concentration C= 10–5–10–2M were determined by conductometry and microelectrophoresis. The dependences of surface conductivity and ζ-potential on the electrolyte content were calculated by formulas of the Wagner and Henry theories. It was shown that, in the region of dilute solutions, ζ(log C) curves thus obtained significantly differ from corresponding functions calculated by the Smoluchowski equation. At the same time, these dependences agreed closely with the ζ(log C) dependences determined for the same systems by the streaming potential method with allowances for experimental values of the surface conductivity. Using aluminum oxide suspensions in NaBr and HBr ethanol solutions as examples, it was shown that, to obtain correct values of the ζ-potential from electrophoretic mobility of porous particles impregnated with a solution, it is necessary to allow for the bulk conductance of the particles.
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REFERENCES
Dukhin, S.S., Elektropoverkhnostnye i elektrokineticheskie svoistva dispersnykh sistem (Electrosurface and Electrokinetic Properties of Disperse Systems), Kiev: Naukova Dumka, 1975.
Dukhin, S.S. and Derjaguin, B.V., Elektroforez (Electrophoresis), Moscow: Nauka, 1976.
Hunter, R.J., Zeta Potential in Colloid Science. Principles and Applications, London: Academic, 1981.
Hunter, R.J., Foundations of Colloid Science, Oxford: Clarendon, 1989, vol. 2.
Lyklema, J., Fundamentals of Interface and Colloid Science, vol. 2: Solid-Liquid Interfaces, London: Academic, 1995.
Hidalgo-Alvarez, R., Adv. Colloid Interface Sci., 1991, vol. 34, p. 217.
Dukhin, S.S., Adv. Colloid Interface Sci., 1995, vol. 61, p. 17.
Barany, S., Adv. Colloid Interface Sci., 1998, vol. 75, p. 45.
Grigorov, O.N., Koz'mina, Z.P., Markovich, A.V., and Fridrikhs¿erg, D.A., Elektrokineticheskie svoistva kapillyarnykh sistem (Electrokinetic Properties of Capillary Systems), Moscow: Akad. Nauk SSSR, 1956.
Bikerman, J.J., Z. Phys. Chem. A, 1932, vol. 163, p. 378.
Kijlstra, J., van Leeuwen, H.P., and Lyklema, J., J. Chem. Soc. Faraday Trans., 1992, vol. 88, p. 3441.
Van der Wal, A., Minor, M., Norde, W., et al., Langmuir, 1997, vol. 13, p. 165.
Van den Hoven, Th.J.J. and Bijster¿osch, B.H., Colloids Surf., 1987, vol. 22, p. 187.
Van der Wal, A., Minor, M., Norde, W., et al., J. Colloid Interface Sci., 1997, vol. 186, p. 71.
Minor, M., van der Linde, A.J., and Lyklema, J., J. Colloid Interface Sci., 1998, vol. 203, p. 177.
Zhukov, A.N., Levashova, L.G., and Evstratova, A.Yu., Kolloidn. Zh., 1981, vol. 43, no. 2, p. 240.
Zhukov, A.N., Levashova, L.G., and Men'shikova, A.Yu., Vest. Leningr. Univ., Ser. 4: Fiz., Khim., 1989, vol. 3, no. 18, p. 61.
Zhukov, A.N. and Varzhel', V.I., Kolloidn. Zh., 1990, vol. 52, no. 4, p. 781.
Varzhel', V.I., Zhukov, A.N., Levashova, L.G., and Uspenskaya, S.V., Vest. Leningr. Univ., Ser. 4: Fiz., Khim., 1990, vol. 3, no. 18, p. 61.
Grigorov, O.N., Karpova, I.F., Koz'mina, Z.P., et al., Rukovodstvo k prakticheskim ra¿otam po kolloidnoi khimii (La¿oratory Manual on Colloid Chemistry), Moscow: Khimiya, 1964.
Wagner, K.W., Die Isolierstoffe der Elektrotechnik, Berlin: Springer-Verlag, 1924.
Dukhin, S.S. and Shilov, V.N., Dieletkricheskie yavleniya i dvoinoi sloi v dispersnykh sistemakh i polielektrolitakh (Dielectric Phenomena and Dou¿le Layer in Disperse Systems and Polyelectrolytes), Kiev: Naukova Dumka, 1972.
Kratochvil, B. and Yeager, H.L., Top. Curr. Chem., 1972, vol. 27, p. 1.
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Zhukov, A.N., Duda, L.V. & Fedorova, I.L. Effect of the Surface Conductance on Electrokinetic Potential Measured in Nonaqueous Media. Colloid Journal 63, 301–305 (2001). https://doi.org/10.1023/A:1016692126471
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DOI: https://doi.org/10.1023/A:1016692126471