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Environ Sci Technol. 2008 Aug 15;42(16):6160-6.

New method of water purification based on the particle-exclusion phenomenon.

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Department of Bioengineering, Box 355061, University of Washington, Seattle, Washington 98195, USA.


Colloidal particles in suspension are excluded from the vicinity of various hydrophilic surfaces. On the basis of this phenomenon, a novel method of water purification is proposed and tested. Proof-of-concept is demonstrated using a custom-made extractor that collected clean water from the annular "exclusion zone" within a Nafion tube. Up to 99.6% of particles could be removed from the suspension. The experimental results suggest that particle exclusion may provide a new framework for water purification from both organic and inorganic matter, as well as from harmful pathogens.

[Indexed for MEDLINE]

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