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Updated: May 29, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
[Evaluation of the vant'Hoff's osmotic coefficient in concentration polarization conditions of membrane system]
Jolanta Jasik-Slezak1, Kornelia Olszówka, Andrzej Slezak
1Katedra Zdrowia Publicznego Politechnika Czestochowska
Abstract:
In this paper the method of evaluation the value of osmotic vant't Hoff's coefficient (f) in membrane system, which is based on the original equation of third degree for the coefficient f was elaborated. This equation, obtained on the basis of Kedem-Katchalsky equation, contains the transport parameters of membrane (Lp, sigma, omega), solution concentration (C), volume flux (Jvm), thickness of concentration boundary layer (delta), etc. These parameters can be determined in a series of independent experiments. The calculation performed for the solution of ammonia in aqueous solution of KCl and polymer membranes show that, the value of coefficient f fulfill the condition 1 < or = f < or = 2 and that there is a range of concentrations of ammonia, in which the changes f occur nonmonitically
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