Photocatalytic inactivation of E. coli in surface water using immobilised nanoparticle TiO2 films

DMA Alrousan, PSM Dunlop, TA McMurray, JA Byrne

Research output: Contribution to journalArticle

186 Citations (Scopus)

Abstract

Photocatalysis is a promising method for the disinfection of potable water in developing countries where solar irradiation can be employed, thus reducing the cost of treatment. In addition to microbial contamination, water normally contains suspended solids, dissolved inorganic ions and organic compounds (mainly humic substances) which may affect the efficacy of solar photocatalysis. In this work the photocatalytic and photolytic inactivation rates of Escherichia coli using immobilised nanoparticle TiO2 films were found to be significantly lower in surface water samples in comparison to distilled water. The presence of nitrate and sulphate anions spiked into distilled water resulted in a decrease in the rate of photocatalytic disinfection. The presence of humic acid, at the concentration found in the surface water, was found to have a more pronounced affect, significantly decreasing the rate of disinfection. Adjusting the initial pH of the water did not markedly affect the photocatalytic disinfection rate, within the narrow range studied.
LanguageEnglish
Pages47
JournalWater Research
Volume43
Issue number1
DOIs
Publication statusPublished - 2009

Fingerprint

Disinfection
Surface waters
disinfection
Escherichia coli
Nanoparticles
surface water
Photocatalysis
Water
water
humic substance
Organic compounds
Developing countries
Potable water
humic acid
anion
Nitrates
organic compound
irradiation
Contamination
Negative ions

Cite this

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abstract = "Photocatalysis is a promising method for the disinfection of potable water in developing countries where solar irradiation can be employed, thus reducing the cost of treatment. In addition to microbial contamination, water normally contains suspended solids, dissolved inorganic ions and organic compounds (mainly humic substances) which may affect the efficacy of solar photocatalysis. In this work the photocatalytic and photolytic inactivation rates of Escherichia coli using immobilised nanoparticle TiO2 films were found to be significantly lower in surface water samples in comparison to distilled water. The presence of nitrate and sulphate anions spiked into distilled water resulted in a decrease in the rate of photocatalytic disinfection. The presence of humic acid, at the concentration found in the surface water, was found to have a more pronounced affect, significantly decreasing the rate of disinfection. Adjusting the initial pH of the water did not markedly affect the photocatalytic disinfection rate, within the narrow range studied.",
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Photocatalytic inactivation of E. coli in surface water using immobilised nanoparticle TiO2 films. / Alrousan, DMA; Dunlop, PSM; McMurray, TA; Byrne, JA.

In: Water Research, Vol. 43, No. 1, 2009, p. 47.

Research output: Contribution to journalArticle

TY - JOUR

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