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- W2031246825 abstract "We present and test a device designed to measure the streaming potential of plane inorganic membrane during filtration. Two kinds of microporous membranes (a membrane made of a mixture of alumina-titania and this same type of membrane covered with an additional titania layer) are studied with different pH, ionic strength and electrolyte nature. The modification of the surface acid-basic equilibriums is analysed from the streaming potential measurements. The pores size of the studied membranes is large enough to avoid overlapping of the double layers. Streaming potential measurements are used to determine the zeta potential of the membranes from the Helmholtz-Smoluchowski relationship, corrected for the lowest ionic strengths studied. The shifting of the isoelectric point of the membranes studied with CaCl2 and Na2SO4 solutions shows specific adsorption of calcium and sulfate ions onto the surface. The additional titania layer on the alumina-titania support does not seem to modify the electrokinetic properties of the membrane. The interactions of the alumina-titania membrane with the H+ and OH− ions are analysed by studying the variations of pH between permeate and retentate compartments. These variations allow determining the isoelectric point of the membrane with a reasonable precision." @default.
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- W2031246825 date "1997-10-01" @default.
- W2031246825 modified "2023-09-27" @default.
- W2031246825 title "Characterisation of the electrokinetic properties of plane inorganic membranes using streaming potential measurements" @default.
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- W2031246825 doi "https://doi.org/10.1016/s0376-7388(97)00094-x" @default.
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