Reduction of Legionella pneumophila and Pseudomonas aeruginosa bacteria in water using gamma irradiation

Rachel Roberts, Robin Orr, Ian Mein, Alex Paddon, Jonathan Cheesewright, Ruth Edge

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Abstract

Pathogenic bacteria found in low levels in natural water systems can present a hazard to human health, such as through contraction of Legionnaires disease, if conditions are favourable for growth and there is potential to create an aerosol. In this study, gamma radiation using a60Co source was applied to Legionella pneumophila and Pseudomonas aeruginosa bacteria for 60 min at varying dose rates. All L. pneumophila bacteria were eliminated by irradiation at a dose of 1.86 kGy, and all P. aeruginosa at a dose of 0.70 kGy. Approximate D10 values for L. pneumophila and P. aeruginosa bacteria were 166.3 Gy and 70.9 Gy respectively.
Original languageEnglish
Article number110359
JournalRadiation Physics and Chemistry
Volume199
Early online date22 Jun 2022
DOIs
Publication statusPublished - 1 Oct 2022

Research Beacons, Institutes and Platforms

  • Dalton Nuclear Institute

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