Kinetics and Mechanisms of Virus Inactivation by Chlorine Dioxide in Water Treatment: A Review
- 1 April 2021
- journal article
- review article
- Published by Springer Science and Business Media LLC in Bulletin of Environmental Contamination and Toxicology
- Vol. 106 (4), 560-567
- https://doi.org/10.1007/s00128-021-03137-3
Abstract
Chlorine dioxide (ClO2), an alternative disinfectant to chlorine, has been widely applied in water and wastewater disinfection. This paper aims at presenting an overview of the inactivation kinetics and mechanisms of ClO2 with viruses. The inactivation efficiencies vary greatly among different virus species. The inactivation rates for different serotypes within a family of viruses can differ by over 284%. Generally, to achieve a 4-log removal, the exposure doses, also being referred to as Ct values (mutiplying the concentration of ClO2 and contact time) vary in the range of 0.06-10 mg L-1 min. Inactivation kinetics of viruses show two phases: an initial rapid inactivation phase followed by a tailing phase. Inactivation rates of viruses increase as pH or temperature increases, but show different trends with increasing concentrations of dissolved organic matter (DOM). Both damages in viral proteins and in the 5 ' noncoding region within the genome contribute to virus inactivation upon ClO2 disinfection.Keywords
Funding Information
- National Key Research and Development Program of China (No. 2017YFE0133200)
- Guangdong Provincial Science and Technology Planning Project (No. 2019A050503006)
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