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Photoelectrocatalysis by titanium dioxide for water treatment

Lookup NU author(s): Dr Terry Egerton, Professor Paul Christensen, Samia Kosa, John Harper, Dr James Tinlin

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Abstract

This paper reviews the potential advantages of photoelectrocatalytic treatment of water and considers three general problems - UV penetration, mass transfer and electrode fouling - associated with the practical application of photoelectrocatalytic treatment of water. The three systems selected for these studies, representative of a broad range of possible pollutants, were aqueous solutions of 4-nitrophenol, water inoculated with E. coli, and water with naturally occurring humic acids. Nitrophenol solutions were of particular interest because of the challenges associated with a complex, multi-step degradation process and with UV penetration of water contaminated with substituted aromatic compounds. Possible mass transfer limitations were considered for the nitrophenol solution and also for E. coli suspensions. Electrode fouling was considered in the context of nitrophenol oxidation and humic acid oxidation, whilst the effect of poisoning was investigated by comparing of the effect of phosphate on a photocatalytic b photoelectrocatalytic disinfection of E. coli suspensions. Where appropriate, the results from photoelectrocatalysis were compared with those from photocatalysis under the same conditions. Copyright © 2006 Inderscience Enterprises Ltd.


Publication metadata

Author(s): Egerton TA, Christensen PA, Kosa SAM, Onoka B, Harper JC, Tinlin JR

Publication type: Article

Publication status: Published

Journal: International Journal of Environment and Pollution

Year: 2006

Volume: 27

Issue: 1-3

Pages: 2-19

Print publication date: 01/01/2006

ISSN (print): 0957-4352

ISSN (electronic): 1741-5101

Publisher: Inderscience Publishers

URL: http://inderscience.metapress.com/link.asp?id=66ff4l85t2c67y72


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