Membrane and Water Treatment

  • 제2권4호
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  • Pages.251-266
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  • 2011
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  • 2005-8624(pISSN)
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  • 2092-7037(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

The use of HRSEM to characterize new and aged membranes in drinking water production

  • Wyart, Y. (Laboratoire de Mecanique, Modelisation et Procedes Propres (M2P2-CNRS-UMR 6181), Universite Paul Cezanne Aix Marseille) ;
  • Nitsche, S. (Centre Interdisciplinaire de Nanoscience de Marseille (CINaM-UPR 3138), Campus de Luminy) ;
  • Chaudanson, D. (Centre Interdisciplinaire de Nanoscience de Marseille (CINaM-UPR 3138), Campus de Luminy) ;
  • Glucina, K. (SUEZ ENVIRONNEMENT, CIRSEE) ;
  • Moulin, P. (Laboratoire de Mecanique, Modelisation et Procedes Propres (M2P2-CNRS-UMR 6181), Universite Paul Cezanne Aix Marseille)
  • 투고 : 2010.10.14
  • 심사 : 2011.10.05
  • 발행 : 2011.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

This work deals with the use of High Resolution Scanning Electron Microscopy (HRSEM) to verify ultrafiltration membrane selectivity at the end of the production line as well as membrane ageing. The first part of this work is focused on new membranes. It is shown that it is better to use sputtering metallization than vacuum deposition, as this latter technique entails thermal damage to the skin layer. Moreover, the impact of the metallization layer on the determination of the membrane pore size is studied and it is observed that no impact of the metallization step can be clearly defined for a metallization layer ranging from 3 to 12 nm. For example, an average pore size of 16.9 nm and a recovery rate of 6.5 % are observed for a 150 kDa cellulose acetate membrane. These results are in agreement with those given by the manufacturer: pore size ranging from 10 to 15 nm and recovery rate ranging from 5 to 10 %. The second part of this work focuses on the study of membrane ageing. A PVDF hollow fibre membrane is studied. It is shown that a 65 % decrease in the permeate flux can be linked to a decrease in the number of pores at the surface of the membrane and a decrease in the recovery rate. In conclusion, a mapping of the pores is performed for several new hollow fibre membranes used to produce drinking water, made of different materials, with different geometries and molecular weight cut-off. These results provide reference data that will help better understand the phenomena of membrane fouling and membrane ageing.

키워드

참고문헌

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피인용 문헌

  1. Analysis of performance criteria for ultrafiltration membrane integrity test using magnetic nanoparticles vol.353, 2014, https://doi.org/10.1016/j.desal.2014.09.004
  2. SEM imaging of membranes: Importance of sample preparation and imaging parameters vol.463, 2014, https://doi.org/10.1016/j.memsci.2014.03.048
  3. Morphological analysis of flat and hollow fiber membranes by optical and microscopic methods as a function of the fouling vol.472, 2014, https://doi.org/10.1016/j.memsci.2014.08.012
  4. Étude comparative de deux méthodes de caractérisation de membranes d’ultrafiltration et de nanofiltration : la porométrie bi-liquide et le transport de solutés neutres vol.18, pp.5, 2015, https://doi.org/10.1016/j.crci.2014.10.009