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Filtration performance and pore size distribution of hypochlorite aged PES/PVP ultrafiltration membranes

Pellegrin, Bastien and Mezzari, Fernanda and Hanafi, Yamina and Szymczyk, Anthony and Remigy, Jean-Christophe and Causserand, Christel Filtration performance and pore size distribution of hypochlorite aged PES/PVP ultrafiltration membranes. (2015) Journal of Membrane Science, vol. 474. pp. 175-186. ISSN 0376-7388

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Official URL: http://dx.doi.org/10.1016/j.memsci.2014.09.028

Abstract

The objective of the present work is to correlate the evolution of membrane characteristics due to contact with hypochlorite used as cleaning agent to its selectivity towards model solutes. Accelerated ageing experiments were performed by soaking the membrane at ambient temperature in hypochlorite solutions. The total free chlorine concentration of these solutions was fixed at 350 ppm and the pH at 8. The model solute selected was T500 Dextran. The experimental results demonstrated that hypochlorite induced membrane degradation, on one hand modified the solutes–membrane interactions increasing irreversible fouling and, on the other hand, lowered the selectivity. These results have been correlated with the modification of the pore size distribution following a protocol in which fouling did not affect membrane characterization. The most probable scenario of distribution evolution over degradation process was an increase of the pore radius of the initial population, accompanied by a decrease in their number, coupled with the appearance of defects, whose radius increased with the progress of the degradation.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at: http://www.sciencedirect.com/science/article/pii/S0376738814007212
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Other partners > Université de Rennes 1 (FRANCE)
Laboratory name:
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Deposited By: Jean-Christophe Remigy
Deposited On:15 Mar 2016 13:31

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