Kinetics and Mechanisms of Virus Inactivation by Chlorine Dioxide in Water Treatment: A Review

Overview

Journal Bull Environ Contam Toxicol

Specialties Environmental Health
Toxicology

Date 2021 Feb 25

PMID 33629148

Citations 15

Authors

Yuexian Ge

Xinran Zhang

Longfei Shu

Xin Yang

Affiliations

Soon will be listed here.

Abstract

Chlorine dioxide (ClO), 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 ClO 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 ClO and contact time) vary in the range of 0.06-10 mg L 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 ClO disinfection.

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