CHRONOPOTENTIOMETRIC CHARACTERIZATION OF ELECTRODIALYSIS MODULE

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Architecture, Civil Engineering, Environment

Silesian University of Technology

Subject: Architecture , Civil Engineering , Engineering, Environmental

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VOLUME 9 , ISSUE 3 (September 2016) > List of articles

CHRONOPOTENTIOMETRIC CHARACTERIZATION OF ELECTRODIALYSIS MODULE

Stanisław KOTER / Çağlar GÜLER / Izabela KOTER

Keywords :  Electrodialysis, Chronopotentiometry, Limiting current, Current efficiency

Citation Information : Architecture, Civil Engineering, Environment. Volume 9, Issue 3, Pages 129-133, DOI: https://doi.org/10.21307/acee-2016-042

License : (BY-NC-ND 4.0)

Received Date : 01-April-2016 / Accepted: 11-May-2016 / Published Online: 26-August-2018

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ABSTRACT

Classical and chronopotentiometric characterization of the electrodialysis module at the same concentrations of diluate and concentrate was performed. Limiting current was determined from the Cowan-Brown plot, the current efficiency and the mean transport number of counterions – from the concentration changes on the exit of the ED module. The electric resistance was determined from the chronopotentiometric curve. For electric currents higher than the limiting one, the transition time (inflection point) was observed. Thus, having such curves for different values of electric current, the limiting current can be roughly estimated. To estimate a mean counterion transport number from the transition time, an equation, analogous to the Sand equation, should be developed which include both types of membrane.

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