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Fate of Cryptosporidium oocysts in an immobilised titanium dioxide reactor with electric field enhancement

Lookup NU author(s): Professor Thomas CurtisORCiD, Professor Paul ChristensenORCiD


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We have undertaken simple proof of principle experiments to find out if electric field enhanced photo-oxidation using immobilised titanium dioxide will damage Cryptosporidium oocysts. Using a simple Petri dish reactor and two forms of immobilised titanium catalyst (sol-gel and thermal-film) we have tested the ability of this technology to affect Cryptosporidium oocysts permeability assessed by propidium iodide exclusion. Test and control reactor runs were significantly different (P=0.007). The thermal-film reactor had the greatest effect (approximately 27% of the seed) and was statistically distinguishable from the sol-gel reactor and the controls. The sol-gel reactor showed an increase in oocyst permeability, but was not statistically distinguishable from one of the controls. The enhanced performance of the thermal film reactor is attributed to the superior conversion of photochemical holes to hydroxyl radicals at the surface of this catalyst. © 2002 Elsevier Science Ltd. All rights reserved.

Publication metadata

Author(s): Curtis TP, Alker GW, Dowling BM, Christensen PA

Publication type: Article

Publication status: Published

Journal: Water Research

Year: 2002

Volume: 36

Issue: 9

Pages: 2410-2413

ISSN (print): 0043-1354

ISSN (electronic): 1879-2448

Publisher: Pergamon


DOI: 10.1016/S0043-1354(01)00434-1

PubMed id: 12108733


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