Endosmose, electric

In a similar manner the actual hydrostatic pressure difference P produced by electric endosmose can he calculated, with the following result p 2 ( - V ) K... 

If the solid diaphragm material adsorbs both hydrogen and hydroxyl ions it is evident that electric endosmose will cease when equal ionic adsorption has taken place, the double layer potential or electrokinetic potential being at this point zero and the diaphragm is at the isoelectric point. 

In the following tables are given the concentrations of solutions necessaiy to change the sign of a few typical diaphragms and the relative rates of electric endosmose through diaphragms of identical thickness. 

Diaphragm material Solution Diaphragm charge Relative rate of electric endosmose... 

Mukherjee has extended his hypothesis to a consideration of the effects of electrolytes on electric endosmose, utilising the data of Eiissafoff Zeit Phys. Ghem. Lxxix. 385,1912) (see p. 226). 

Electric endosmose is of technical importance for the dehydration of organic, finely suspended substances containing1 very much water, for example, the drying of peat, according,... 

For endosmose a potential difference is applied between the two ends of a capillary tube, or the two sides of a porous plug or membrane, and the rate of motion, or the pressure required to prevent motion, of the liquid, is noted. For streaming potentials the liquid is forced through the tube and the potential difference measured. In every case it is the relative velocity of motion of the two phases in the electric field that is measured, or conversely, the intensity of the field set up when the particles are caused to move. 

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