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Streaming Current Measuring for Determining the Zeta Potential of Granular Particles
Author(s) -
Rodier Elizabeth,
Dodds John
Publication year - 1995
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19950120407
Subject(s) - zeta potential , streaming current , silicon carbide , sieve (category theory) , current (fluid) , materials science , capillary action , conductivity , mechanics , chemistry , composite material , thermodynamics , nanotechnology , electrokinetic phenomena , physics , mathematics , combinatorics , nanoparticle
A simple technique is presented for determining the zeta potential of large particles ( > 20 μm) by streaming current measurements. The method has the advantage of not requiring correction for surface conductivity. The theory involves a description of pore space by either Darcy's law or the Kozeny‐Carman equation. The simplifications introduced by assimilating the pore space to a bundle of capillary tubes are discussed. Results are presented for the variation of zeta potential with pH and ionic strength for a sieve cut of spherical glass beads and two different samples of irregular particles of silicon carbide.