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 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.
Sciacca
Frédéric
F
Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Science and Engineering, GGEC, Lausanne, Switzerland.
Rengifo-Herrera
Juliàn A
JA
Wéthé
Joseph
J
Pulgarin
César
C
D002050:Burkina Faso; D004203:Disinfection; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000378:metabolism; D012475:Salmonella / Q000187:drug effects / Q000528:radiation effects*; D013472:Sunlight; D014867:Water / Q000737:chemistry*
D017382:Reactive Oxygen Species; D014867:Water; D006861:Hydrogen Peroxide; D007501:Iron