Bestimmung des Zeta-Potentials und der Grenzflächenleitfähigkeit durch Strömungspotential- und Strömungsstrommessungen (Determination of the Zeta Potential and the Surface Conductivity by Streaming Potential and Streaming Current Measurements)

2000 ◽  
Vol 67 (9/2000) ◽  
Author(s):  
R. Zimmermann ◽  
Wolfgang Jenschke ◽  
H. Körber ◽  
C. Werner
Keyword(s):  
Zeta Potential ◽  
Streaming Potential ◽  
Surface Conductivity ◽  
Streaming Current ◽  
Zeta Potentials

The Determination of Electrokinetic Coupling-Coefficient and Zeta Potential of Rock Samples by Electrokinetic Measurements

2012 ◽  
Vol 516-517 ◽  
pp. 1870-1873 ◽  
Author(s):  
Jun Wang ◽  
Heng Shan Hu
Keyword(s):  
Zeta Potential ◽  
Coupling Coefficient ◽  
Streaming Potential ◽  
Potential Method ◽  
Surface Conductivity ◽  
Reliable Estimate ◽  
Surface Conductance ◽  
Streaming Current ◽  
Low Concentrations

The electrokinetic effects are important in the understanding of electric properties in porous medium. In this study, the streaming potential and streaming current of saturated samples are measured at different concentrations, then three methods are applied to obtain the zeta-potential and electrokinetic coupling coefficient. The study shows that the results obtained from streaming potential and streaming current methods agree well with each other, but the results obtained from simplified streaming potential method become seriously inaccurate at low concentrations due to the influence of surface conductance. This experimental study also provides a reliable estimate of the surface conductivity and its contribution to zeta-potential at given concentrations.

Apparatus for determination of zeta potentials from streaming potentials

1963 ◽  
Vol 18 (6) ◽  
pp. 1263-1264 ◽  
Author(s):  
R. E. Beck ◽  
V. Mirkovitch ◽  
P. G. Andrus ◽  
R. I. Leininger
Keyword(s):  
Zeta Potential ◽  
Streaming Potential ◽  
Salt Solutions ◽  
Streaming Potentials ◽  
Zeta Potentials ◽  
Quartz Capillary ◽  
Flow Through

A system was developed to measure the streaming potential generated between the ends of a capillary by the flow of a fluid through the capillary. Zeta potential can be calculated from the streaming potential. Adequate sensitivity and reproducibility were achieved by making special electrodes: silver wires plated in KCl solution and embedded in agar, careful electrical shielding, and provision for reversal of flow through the capillary to minimize electrode errors. The apparatus was developed to measure streaming potentials generated by either RingerS's solution or blood in contact with capillaries made of different materials such as quartz, polyethylene, etc. An example of a determination using a quartz capillary is presented. interfaces; blood; salt solutions; glass; quartz Submitted on February 25, 1963

How to use alum with cationic dispersed rosin size

TAPPI Journal ◽  
2016 ◽  
Vol 15 (5) ◽  
pp. 331-335 ◽  
Author(s):  
LEBO XU ◽  
JEREMY MYERS ◽  
PETER HART
Keyword(s):  
Zeta Potential ◽  
Colloidal Particles ◽  
Streaming Potential ◽  
Excessive Amount ◽  
Paper Machine ◽  
Optimum Amount ◽  
Potential Measurement ◽  
Streaming Current ◽  
Wide Range ◽  
Laboratory Results

Retention of cationic dispersed rosin size was studied via turbidity measurements on stock filtrate with different alum and dispersed rosin size dosages. Stock charge characteristics were analyzed using both an analysis of charge demand determined via a streaming current detector and an evaluation of zeta potential of the fibers by streaming potential measurement. The results indicated that an optimum amount of alum existed such that good sizing retention was maintained throughout a wide range of dispersed rosin size dosages. However, when an excessive amount of alum was used and fines and colloidal particles were transitioned from anionic to cationic, the cationic size retention was reduced. Laboratory results were confirmed with a paper machine trial. All data suggested that a stock charge study was necessary to identify optimal alum dosage for a cationic dispersed rosin sizing program.

Effects of Wettability and Zeta Potential of Filter Medium on Oil Removal

2010 ◽  
Vol 148-149 ◽  
pp. 58-70
Author(s):  
Qing Chang ◽  
Bin Wu Yang ◽  
Bi Gui Wei
Keyword(s):  
Zeta Potential ◽  
Removal Efficiency ◽  
Capillary Rise ◽  
Streaming Potential ◽  
Filter Medium ◽  
Oil Removal ◽  
Filter Media ◽  
Zeta Potentials ◽  
Removal Efficiencies

The methods and devices which can be used to determine the wettability and zeta potential of filter medium were developed according to the principles of capillary rise and streaming potential respectively. Lipophilic Hydrophilic Ratio (LHR) was defined based on Washburn equation. LHR values and zeta potentials of some conmen filter media were measured respectively, and the oil removal efficiencies of these filter media were also tested. The result shows that the effect of wettability on oil removal efficiency is much greater than that of zeta potential in conmen condition. The oil removal efficiency mainly depends on LHR value of filter medium, not on zeta potential of filter medium.

The zeta potential of extended dielectrics and conductors in terms of streaming potential and streaming current measurements

2012 ◽  
Vol 14 (27) ◽  
pp. 9758 ◽  
Author(s):  
Amparo M. Gallardo-Moreno ◽  
Virginia Vadillo-Rodríguez ◽  
Julia Perera-Núñez ◽  
José M. Bruque ◽  
M. Luisa González-Martín
Keyword(s):  
Zeta Potential ◽  
Streaming Potential ◽  
Streaming Current

scholarly journals Determination of the mobility of amine- and carboxy-terminated fluospheres and quantum dots by capillary electrophoresis

2016 ◽  
Vol 94 (4) ◽  
pp. 430-435 ◽  
Author(s):  
Amy Tekrony ◽  
David Cramb
Keyword(s):  
Quantum Dots ◽  
Capillary Electrophoresis ◽  
Zeta Potential ◽  
Small Sample ◽  
Particle Type ◽  
Sample Cell ◽  
Zeta Potentials ◽  
Mobility Data

The pharmacokinetics of nanoparticle (NP) theranostics can, in principle, be predicted based on NP size and zeta potential. Zeta potentials are typically measured using bench top zetasizer instruments, which calculate zeta potential based on mobility data collected from solutions in a small sample cell. However, correlations between zeta potentials measured by zetasizer instruments and those calculated from mobilities determined by instruments designed for capillary electrophoresis may not be direct. To that end, mobilities of a variety of NPs were determined by a capillary electrophoresis and used to calculate zeta potentials based on Henry’s equation. The calculated zeta potentials were then compared to zeta potentials measured directly from a zetasizer. It was found that absolute values of the two methods differed, but the relative zeta potential trends per particle type were similar. These trends were demonstrated by data that showed that the zeta potentials measured using a zetasizer correlated highly with zeta potentials determined by capillary electrophoresis.

Measurement of the Streaming Potential and Streaming Current near a Rotating Disk to Determine Its Zeta Potential

Langmuir ◽  
2005 ◽  
Vol 21 (16) ◽  
pp. 7433-7438 ◽  
Author(s):  
James D. Hoggard ◽  
Paul J. Sides ◽  
Dennis C. Prieve
Keyword(s):  
Zeta Potential ◽  
Streaming Potential ◽  
Rotating Disk ◽  
Streaming Current

scholarly journals Electroviscous Effect of Power Law Fluids in a Slit Microchannel With Asymmetric Wall Zeta Potentials

2018 ◽  
Vol 35 (4) ◽  
pp. 537-547 ◽  
Author(s):  
A. Sailaja ◽  
B. Srinivas ◽  
I. Sreedhar
Keyword(s):  
Zeta Potential ◽  
Power Law ◽  
Streaming Potential ◽  
Shear Thickening ◽  
Narrow Slit ◽  
Electroviscous Effect ◽  
Streaming Potentials ◽  
Zeta Potentials ◽  
Power Law Fluids ◽  
Poisson Boltzmann Equation

ABSTRACTThis work analyzes the pressure driven flow of a power law fluid in a slit microchannel of asymmetric walls with electroviscous effects. The steady state Cauchy momentum and the Poisson-Boltzmann equation are solved for the velocity and the potential distribution inside the microchannel. The Debye-Huckel approximation as applicable for low zeta potentials is not made in the present work. The unknown streaming potential is solved by casting the governing equations as an optimization problem using COMSOL Multiphysics. This proposed method is very robust and can be used for a wide variety of cases. It is found that the asymmetry of the zeta potential at the two walls plays an important role on the streaming potential developed. There is a unique zeta potential ratio at which the streaming potential exhibits a maxima for both Debye-Huckel parameter and the power law index. Shear thinning fluids exhibit a stronger dependency of the streaming potential on asymmetry of the zeta potential than shear thickening fluids. For Newtonian fluids narrow slit microchannels develop larger streaming potentials compared to wider microchannels for a given asymmetry.

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