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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Physico-chemical characterization of polyamide NF/RO membranes: Insight from streaming current measurements
Journal of Membrane Science, Volume 461, Year 2014
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Description
Tangential streaming current measurements were performed to investigate the surface charge properties and the charge formation mechanism of various NF/RO membranes. Unlike what is usually done in electrokinetic studies of membranes, experiments were conducted with degassed background solutions under a controlled atmosphere by means of nitrogen gas in order to get accurate electrokinetic measurements even in the basic range of pH. It was demonstrated that the streaming current technique implemented with these rigorous experimental conditions is a reliable tool to verify the presence of an additional coating on a commercial TFC membrane. It was also shown that these electrokinetic measurements allow a more clear discrimination between coated and uncoated membranes than the ATR-FTIR technique. Moreover, experiments performed with and without a nitrogen environment revealed specific adsorption of bicarbonate and carbonate ions coming from the dissolution of carbon dioxide in the air onto the surface of RO polyamide membranes containing hexafluoroalcohol functional groups. © 2014 Elsevier B.V.
Authors & Co-Authors
Idil Mouhoumed, E.
France, Rennes
Université de Rennes
Szymczyk, A. S.
France, Rennes
Université de Rennes
Schäfer, Andrea Iris
Tanzania, Arusha
Nelson Mandela African Institution of Science and Technology
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Paugam, Lydie
France, Rennes
Université de Rennes
La, Young Hye
United States, San Jose
Ibm Research - Almaden
Statistics
Citations: 90
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1016/j.memsci.2014.03.025
ISSN:
03767388
e-ISSN:
18733123
Research Areas
Environmental