An improved method for determining zeta potential and pore conductivity of porous materials

Journal of Colloid and Interface Science
Fuzhi LuDaniel Y Kwok

Abstract

An improved method based on streaming potential and streaming current was proposed to determine zeta potential and surface conductance of porous material simultaneously. In the electrokinetic generation mode, a resistor is connected to the generator and by measuring the voltage drop across resistors with different resistance, a true streaming current can be determined. The zeta potential and surface conductivity can be obtained simultaneously from their relation to streaming potential and streaming current. The electrode and ion concentration polarization effects during the measurement were also discussed. The resistance from channel ends to electrodes, which has typically been ignored in the literature, was shown to have a significant influence on the calculated zeta potential and surface conductance. Ignorance of this resistance would lead to underestimation of both zeta potential and surface conductance values.

References

Nov 10, 2000·Journal of Colloid and Interface Science·D EricksonC Werner
Mar 20, 2001·Journal of Colloid and Interface Science·P. FievetJ. Pagetti
May 14, 2003·Journal of Colloid and Interface Science·Jérôme F L DuvalHerman P van Leeuwen
May 18, 2004·Journal of Colloid and Interface Science·Lev V Gorelik

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Citations

Dec 3, 2008·The Review of Scientific Instruments·Martin ReischlVolker Ribitsch
May 26, 2009·Journal of Colloid and Interface Science·H M Park, J Y Lim
Aug 2, 2013·Journal of Dispersion Science and Technology·Vuk Uskoković

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