title: The impact of selected water quality parameters on the inactivation of Bacillus subtilis spores by monochloramine and ozone.
abstract: Selected water quality parameters-pH, dissolved organic carbon, turbidity (NTU), and temperature-were tested for their potential effects on ozone and monochloramine inactivation of Bacillus subtilis spores. In oxidant demand-free phosphate-buffer, temperature had the strongest influence on inactivation kinetics when using ozone, pH had a smaller but significant impact on B. subtilis spore inactivation with both monochloramine and ozone. Where monochloramine was applied, modeling and experimental measurements confirmed that dichloramine levels were too low to produce significant inactivation effects under these experimental conditions. It was demonstrated that oxidant demand-free phosphate buffer may not be an adequate environmental analogue for inactivation responses in natural waters.
authors.affiliation: Department of Civil, Environmental, and Architectural Engineering University of Colorado, Campus Box 428, Boulder, CO 80309, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Dow
authors.forename: B
authors.initials: B
authors.lastname: Barbeau
authors.forename: U
authors.initials: U
authors.lastname: von Gunten
authors.forename: M
authors.initials: M
authors.lastname: Chandrakanth
authors.forename: G
authors.initials: G
authors.lastname: Amy
authors.forename: M
authors.initials: M
authors.lastname: Hernandez
mesh_terms: D001412:Bacillus subtilis / Q000472:pathogenicity*; D002244:Carbon; D002700:Chloramines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010083:Oxidants, Photochemical / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D013171:Spores, Bacterial / Q000472:pathogenicity; D013696:Temperature; D018508:Water Purification / Q000379:methods*
chemical_list: D002700:Chloramines; D010083:Oxidants, Photochemical; D010126:Ozone; D002244:Carbon; C030816:chloramine