Morphological analysis of flat and hollow fiber membranes by optical and microscopic methods as a function of the fouling

Morphological analysis of flat and hollow fiber membranes by optical and microscopic methods as a function of the fouling

In order to provide a better understanding of the impact of flocculant used on membrane properties in drinking water production, a complete structural characterization of membranes was carried out from microscopic to macroscopic scale. New flat-sheet PES membranes with 10, 30 and 100kDa MWCO were ch...

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Bibliographic Details
Published in:Journal of membrane science Vol. 472; pp. 241 - 250
Main Authors: Wyart, Y., Tamime, R., Siozade, L., Baudin, I., Glucina, K., Deumié, C., Moulin, P.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 15-12-2014
Elsevier
Subjects:
AFM
Atomic force microscopy
Chemical and Process Engineering
Chemistry
Colloidal state and disperse state
Ear
Engineering Sciences
Exact sciences and technology
Filtration
Fouling
General and physical chemistry
Membranes
Morphological multiscale analysis
Optical fibers
Optics
Organic membrane
Photonic
Scanning electron microscopy
White light interferometry
WLI
AFM
Organic membrane
Fouling
WLI
Morphological multiscale analysis
Drinking water
Atomic force microscopy
Flocculation reagent
Morphological analysis
Hollow fiber
Optical method
Membrane
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Summary:In order to provide a better understanding of the impact of flocculant used on membrane properties in drinking water production, a complete structural characterization of membranes was carried out from microscopic to macroscopic scale. New flat-sheet PES membranes with 10, 30 and 100kDa MWCO were characterized by SEM, ellipsometry of angle resolved scattering (EARS), white light interferometry (WLI) and atomic force microscopy (AFM). It was shown that AFM is able to differentiate between membranes according to their MWCO and their manufacturing processes. The impact of flocculant filtration (PAX-XL 7A and Aqualenc F1) on flat-sheet PES 100kDa membrane was studied. SEM and AFM characterizations revealed a modification of membrane surface state after flocculant filtration and cleaning step. AFM was finally used to characterize hollow fiber membranes after 1 and 2 years of water production. The results showed that AFM is a very interesting tool to investigate membrane ageing. •Characterization of flat and hollow fibers at microscopic and macroscopic scales.•Characterization by SEM, AFM, WLI and EARS.•Study of the impact of flocculant filtration on membrane properties.•Characterization of hollow fibers after 1 and 2 years of operation.
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content type line 23
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2014.08.012