title: Roles of hydroxyl radicals in electrolyzed oxidizing water (EOW) for the inactivation of Escherichia coli.
abstract: The food industry has recognized electrolyzed oxidizing water (EOW) as a promising alternative decontamination technique. However, there is not a consensus about the sanitizing mechanism of EOW. In this study, we evaluated the disinfection efficacy of different types of EOW on Escherichia coli. Based on the hypothesis of hydroxyl radicals existing in EOW, in the present study, the hydroxyl radicals existed in slightly acidic electrolyzed water (SAEW) and acidic electrolyzed water (AEW) diluted to different levels were detected quantitatively. An ultraviolet (UV) spectrophotometer was used to scan EOW with different pH values. Accounting for the results of UV scanning to EOW with different pH value and the disinfection efficacy of different types of EOW, it can be concluded that considering the lower chlorine concentration of EOW compared with traditional chlorine disinfectants, the existing form of chlorine compounds rather than the hydroxyl radicals played important role in the disinfection efficacy of EOW.
authors.affiliation: College of Bio Science and Engineering, Hebei University of Science and Technology, No.70 Yuhuadonglu, Shijiazhuang, Hebei 050018, PR China.
authors.forename: Jianxiong
authors.initials: J
authors.lastname: Hao
authors.forename: Shuang
authors.initials: S
authors.lastname: Qiu
authors.forename: Huiying
authors.initials: H
authors.lastname: Li
authors.forename: Tianpeng
authors.initials: T
authors.lastname: Chen
authors.forename: Haijie
authors.initials: H
authors.lastname: Liu
authors.forename: Lite
authors.initials: L
authors.lastname: Li
mesh_terms: D058491:Bacterial Load; D017606:Chlorine Compounds / Q000737:chemistry; D004202:Disinfectants / Q000737:chemistry; D004203:Disinfection / Q000379:methods*; D004572:Electrolysis; D004926:Escherichia coli / Q000254:growth & development*; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D017606:Chlorine Compounds; D004202:Disinfectants; D014867:Water; D017665:Hydroxyl Radical