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  5. Understanding particle deposition kinetics on NF membranes: A focus on micro-beads & membrane interactions at different environmental conditions
 
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Understanding particle deposition kinetics on NF membranes: A focus on micro-beads & membrane interactions at different environmental conditions

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Author(s)
Cao, Huayu 
Habimana, Olivier 
Correia-Semião, Andrea Joana C. 
Allen, Ashley 
Heffernan, Rory 
Casey, Eoin 
Uri
http://hdl.handle.net/10197/6360
Date Issued
01 February 2015
Date Available
19T10:05:14Z February 2015
Abstract
The significance of nanofiltration membrane surface properties when interacting with microbeads with and without permeate flux was investigated. This was achieved by characterising the surface tension and zeta potential of micro-beads and NF90 membranes to determine the colloid–membrane interaction forces. Dynamic adhesion assays under different ionic strengths (0.1 M and 0.01 M) and pH (5, 7, and 9) were conducted. Experimental results showed that at high ionic strength, pH does not have a significant effect on adhesion rates, while at low ionic strength the adhesion rate increased at pH 7 (4.56 s−1 cm−2) compared to pH 5 and pH 9, with rates of 2.69 and 3.66 s−1 cm−2 respectively. A model was devised to predict colloidal adhesion onto membranes under increasing permeate flux conditions, taking into account all interaction forces. Model predictions indicate that drag force overwhelms all other colloid–membrane interaction forces when the permeate flux increases to 7.2 L h−1 m−2. This study suggests that altering membrane surface properties for the prevention of fouling may be limited in its success as an antifouling strategy.
Sponsorship
European Research Council
Science Foundation Ireland
Type of Material
Journal Article
Publisher
Elsevier
Journal
Journal of Membrane Science
Volume
475
Start Page
367
End Page
375
Copyright (Published Version)
2014 Elsevier
Keywords
  • Adhesion

  • Nanofiltration

  • XDVLO

  • Biofouling

  • Microbead

DOI
10.1016/j.memsci.2014.10.038
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Owning collection
Chemical and Bioprocess Engineering Research Collection
Scopus© citations
12
Acquisition Date
Mar 29, 2023
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