Nanofiltration and low pressure reverse osmosis membranes are well-known in the field of drinking water production and their separation performance is very strongly related to their intrinsic characteristics. The membrane characterization (scanning electron microscopy (SEM), atomic force microscopy (AFM), zeta potential …) was realized on a NF270 and extra-low energy (XLE) membrane. SEM results of virgin NF270 and XLE membranes show that both are about the same thickness whereas that of the active layer of NF270 membrane is weaker than that of the XLE. The AFM measurements show that the roughness of the low pressure reverse osmosis membrane (XLE) is almost 20 times as high as that of nanofiltration (NF270). Zeta potential measurements showed that both membranes are negatively charged in pH (4–12) range. An increase in permeability by increasing feed pressure and temperature was also noted for the two types of membrane; but the permeability evolution for XLE membrane according to the volume factor reduction reveals a fall faster than that of NF270.
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Research Article|
April 01 2011
Intrinsic properties and performances of NF270 and XLE membranes for water filtration Available to Purchase
S. N. Diop;
S. N. Diop
1Faculté des Sciences and Techniques, University Cheikh anta Diop, P.O. 5005 Dakar Fann, Senegal
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M. A. Diallo;
M. A. Diallo
1Faculté des Sciences and Techniques, University Cheikh anta Diop, P.O. 5005 Dakar Fann, Senegal
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C. K. Diawara;
1Faculté des Sciences and Techniques, University Cheikh anta Diop, P.O. 5005 Dakar Fann, Senegal
E-mail: [email protected]
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D. Cot
D. Cot
2Institut Européen des Membranes, Place Eugène Bataillon, B.P 34095 Montpellier Cedex 5, France
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Water Supply (2011) 11 (2): 186–193.
Article history
Received:
September 29 2010
Accepted:
December 31 2010
Citation
S. N. Diop, M. A. Diallo, C. K. Diawara, D. Cot; Intrinsic properties and performances of NF270 and XLE membranes for water filtration. Water Supply 1 April 2011; 11 (2): 186–193. doi: https://doi.org/10.2166/ws.2011.024
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