Dramatic enhancement of solar disinfection (SODIS) of wild Salmonella sp. in PET bottles by H2O2 addition on natural water of Burkina Faso containing dissolved iron

Disinfection of surface water containing dissolved iron (0.3 mg L(-1)) at natural neutral pH ( approximately 7.5) was carried out via solar disinfection (SODIS) treatment in PET bottles with H(2)O(2) (10 mg L(-1)). Wild coliforms and Salmonella sp. were monitored for 6 h of sunlight irradiation and...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2010-02, Vol.78 (9), p.1186-1191
Main Authors: SCIACCA, Frédéric, RENGIFO-HERRERA, Juliàn A, WETHE, Joseph, PULGARIN, César
Format: Article
Language:English
Subjects:
Applied sciences
Bacteria
Bottles
Burkina Faso
Disinfection
Dissolution
Escherichia coli
Exact sciences and technology
Hydrogen Peroxide - pharmacology
Hydrogen-Ion Concentration
Iron
Iron - chemistry
Monitoring
Pollution
Polyethylene terephthalates
Reactive Oxygen Species - metabolism
Salmonella
Salmonella - drug effects
Salmonella - radiation effects
Sunlight
Water - chemistry
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Summary:Disinfection of surface water containing dissolved iron (0.3 mg L(-1)) at natural neutral pH ( approximately 7.5) was carried out via solar disinfection (SODIS) treatment in PET bottles with H(2)O(2) (10 mg L(-1)). Wild coliforms and Salmonella sp. were monitored for 6 h of sunlight irradiation and 72 h of dark post-treatment period. In our conditions, SODIS treatment could not avoid Salmonella sp. re-growth during dark storage, meanwhile the addition of 10 mg L(-1) of H(2)O(2) showed a strong enhancement of the inactivation rate without any re-growth of both bacteria. Finally, total coliforms (Escherichia coli included) demonstrated to be an inappropriate indicator for monitoring bacterial contamination in water during solar disinfection processes.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2009.12.001