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Cake-Enhanced Concentration Polarization: A New Fouling Mechanism for Salt-Rejecting Membranes
Abstract
Results from well-controlled colloidal fouling experiments with reverse osmosis (RO) and nanofiltration (NF) membranes suggest the existence of a new source of flux decline for salt-rejecting membranes-cake-enhanced osmotic pressure. The physical mechanisms leading to this enhanced osmotic pressure are a combination of hindered back-diffusion of salt ions and altered cross-flow hydrodynamics within colloidal deposit layers, which lead to an enhanced salt concentration polarization layer. A model that accounts for both hindered diffusion of salt ions and altered hydrodynamics within colloidal deposit ("cake") layers is presented. The model successfully links permeate flux and salt rejection to cake-enhanced concentration polarization and provides new insight into the mechanisms through which salt-rejecting membranes foul. Experimental data support the model calculations and highlight the role of enhanced concentration polarization phenomena in the performance (i.e., water flux and salt rejection) of polymeric thin-film composite RO/NF membranes in environmental applications.
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Cited by
A review of polymeric membranes and processes for potable water reuse
Warsinger, D. M., Chakraborty, S., Tow, E. W., Plumlee, M. H., Bellona, C., Loutatidou, S., Karimi, L., Mikelonis, A. M., Achilli, A., Ghassemi, A., et al. (2018) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2018.01.004 · Cited by 747
Chen, L., Gu, Y., Cao, C., Zhang, J., Ng, J.-W., & Tang, C. (2014) · Water Research · doi:10.1016/j.watres.2013.12.009 · Cited by 262
Zeidabadi, F. A., Esfahani, E. B., & Mohseni, M. (2023) · Journal of Hazardous Materials Advances · doi:10.1016/j.hazadv.2023.100322 · Cited by 61
Metadata
- Authors
- Hoek, E. M. V., & Elimelech, M.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-11-06
- Volume
- 37
- Issue
- 24
- Pages
- 5581-5588
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W1999310626
- Cited by
- 665
- References
- 0
- FWCI
- 10.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Cake-Enhanced Concentration Polarization: A New Fouling Mechanism for Salt-Rejecting Membranes. https://app.cochat.ai/papers/10.1021/es0262636
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- Hoek, E. M. V., & Elimelech, M. (2003). Cake-Enhanced Concentration Polarization: A New Fouling Mechanism for Salt-Rejecting Membranes. Environmental Science & Technology. https://doi.org/10.1021/es0262636
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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
