title: 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.
abstract: 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.
authors.affiliation: Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Science and Engineering, GGEC, Lausanne, Switzerland.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Sciacca
authors.forename: Juliàn A
authors.initials: JA
authors.lastname: Rengifo-Herrera
authors.forename: Joseph
authors.initials: J
authors.lastname: Wéthé
authors.forename: César
authors.initials: C
authors.lastname: Pulgarin
mesh_terms: 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*
chemical_list: D017382:Reactive Oxygen Species; D014867:Water; D006861:Hydrogen Peroxide; D007501:Iron