Determination of the electrolyte and osmotic permeability coefficients by conductometric and emf methods [An article from: Desalination]

This digital document is a journal article from Desalination, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The emf method has been compared with the conductometric one in determining the apparent electrolyte permeability of membrane (P"s^(^v^)). It has been found that this method is limited to the membranes of low permeability (P"s^(^v^)l"m of the order 10^-^7 m/s). In order to obtain the real permeability coefficient (P"s), the conductometric method of determining osmotic flow has been proposed. The influence of concentration polarisation on P"s has been estimated. The extended expression for the polarisation correction factor has been derived. The thickness of the polarisation layer has been calculated from the limiting current density, determined using the Nafion 117 membrane.