Échange d'ions pour la production d'eau très pure : étude des limitations cinétiques par la méthode des micro-colonnes : extension à l'électrodéionisation

Abstract : This work deals with the production of very high pulity water using ion exchange. In case of solutions with a very low normality, ion exchange is generally limited by kinetic phenomena. It is important to master these phenomena in arder to madel and to predict the breakthrough curves for a given system. This study implements a simple madel (modified Fick law), coupled to the experimental determination of the parameters by the method of micro-columns. This method consists in using a sufficiently short column, which does not contain the concentration front completely. Measuring the concentration at the column exit gives access to information on the kinetics. The experimental data are processed with the mixing cells model. The operating conditions yielding the most reliable results are investigated. Several cationic and anionic solutions were studied. An extension of this method to electrodeionisation showed that it could lead to interesting results with such systems as well.
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Isabelle Monzie. Échange d'ions pour la production d'eau très pure : étude des limitations cinétiques par la méthode des micro-colonnes : extension à l'électrodéionisation. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2003. Français. ⟨NNT : 2003INPL041N⟩. ⟨tel-01749763⟩

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