Photocatalytic removal of taste and odour compounds for drinking water treatment

Tran, H., Evans, G. M., Yan, Y. and Nguyen, A. V. (2009) Photocatalytic removal of taste and odour compounds for drinking water treatment. Water Science and Technology: Water Supply, 9 5: 477-483. doi:10.2166/ws.2009.637

Author Tran, H.
Evans, G. M.
Yan, Y.
Nguyen, A. V.
Title Photocatalytic removal of taste and odour compounds for drinking water treatment
Journal name Water Science and Technology: Water Supply   Check publisher's open access policy
ISSN 1606-9749
Publication date 2009
Year available 2009
Sub-type Article (original research)
DOI 10.2166/ws.2009.637
Volume 9
Issue 5
Start page 477
End page 483
Total pages 7
Editor Helmut Kroiss
Place of publication London, U.K.
Publisher IWA Publishing
Collection year 2010
Language eng
Subject 090406 Powder and Particle Technology
860899 Human Pharmaceutical Products not elsewhere classified
Abstract Photocatalytic degradation of geosmin and 2-methylisoborneol (MIB), which are two taste and odour compounds commonly found in drinking water supply sources, was investigated using an immobilised TiO2 photoreactor. It was found that the degradation of geosmin and MIB followed similar pseudo-first-order kinetics with reaction rate constants being approximately 0.025 min-1 for typical geosmin and MIB concentrations of 250 and 500 ng/L. The normalised formal quantum efficiency was calculated to be in the range of 162–182 L/mol. Influence of additives (i.e. sodium bicarbonate and alcohols) on the degradation process was also investigated. It was found that there was a small reduction in the degradation rate constants of geosmin and MIB with increasing sodium bicarbonate concentration. At 50 mg/L sodium bicarbonate the degradation rate constants decreased by approximately 5%. Similarly, for methanol and ethanol concentrations up to 35 and 50 mg/L, respectively, these constants were found to also decrease. While addition of sodium bicarbonate and alcohols was seen to have relatively small negative effects on the photocatalytic degradation performance, the magnitude of their influence was consistent with the hypothesis that the degradation mechanism of geosmin and MIB was predominately that of attack involving HO∙ radicals.
Keyword Advanced Oxidation
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
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Created: Fri, 26 Feb 2010, 16:32:02 EST by Dr Orhan Ozdemir on behalf of School of Chemical Engineering