A Comparative Study of the Inactivation of Adenovirus and Coxsackievirus with Ultraviolet Light, Chlorine, and Ozone

摘要

When considering optimization of pathogen control in drinking water treatment plants, itrnis important for facilities to provide a multi-barrier approach for protection. Due to thernformation of regulated disinfection byproducts (DBPs), the use of free chlorine and ozone, tworneffective and commonly used disinfectants for virus control, is decreasing, and alternativerndisinfectants which might be less effective in inactivating viruses are being implemented.rnUltraviolet (UV) light is being adopted by some utilities to control protozoan (oo)cysts, such asrnCryptosporidium parvum, and to reduce the formation of regulated DBPs, such as bromate.rnHowever, UV disinfection might not perform effectively against all viruses. Therefore, virusesrnhave emerged as pathogens of potential concern.rnThe inactivation kinetics of many viruses have not been characterized completely, evenrnwith common disinfectants. In this study, the inactivation of Coxsackievirus, a single-strandedrnRNA virus, and Adenovirus, a double-stranded DNA virus, by UV light, free chlorine, and ozonernwas characterized. Coxsackievirus is highly virulent, with health effects including respiratoryrnillnesses, diarrhea, fever, myocarditis, aseptic meningitis, and miscarriages. Previous studiesrnhave indicated that Coxsackievirus is relatively resistant to free chlorine, making the fullrncharacterization of its inactivation kinetics an important venture. Because of its resistance tornultraviolet light, Adenovirus has emerged as a contaminant of concern for water treatment plantsrnthat utilize UV for control of pathogens. Adenovirus is a water-borne pathogen with healthrneffects including sore throat, respiratory infections, cough, fever, diarrhea, and vomiting. Datarnfrom UV, chlorine, and ozone disinfection will be presented. The results from thisrncomprehensive and comparative study will provide useful information for the overallrnoptimization of pathogen control in drinking water treatment facilities.