Ozonation of organic compounds in water and wastewater: A critical review

• Published in: Water research (Oxford) Vol. 213; p. 118053
• Main Authors: Lim, Sungeun, Shi, Jiaming Lily, von Gunten, Urs, McCurry, Daniel L.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 15-04-2022
• Subjects: Antibiotic resistance genes; Dissolved organic matter; Kinetics; Mechanisms; Organic contaminants; Ozone; Ozone; Mechanisms; Dissolved organic matter; Kinetics; Organic contaminants; Antibiotic resistance genes
• ISSN: 0043-1354; 1879-2448
• DOI: 10.1016/j.watres.2022.118053

•Evaluation of ozonation is needed for applications to impaired water qualities.•Bulk parameters (UV, EDC, HRMS) elucidate changes in DOM during ozonation.•Ozone-reactive organic moieties are assessed for kinetics and mechanisms.•Evaluated organic moieties: Olefins, aromatic, nitrogen or sulfur compounds.•Inactivation of antibiotic resistant bacteria/genes by ozone are evaluated.
Ozonation has been applied in water treatment for more than a century, first for disinfection, later for oxidation of inorganic and organic pollutants. In recent years, ozone has been increasingly applied for enhanced municipal wastewater treatment for ecosystem protection and for potable water reuse. These applications triggered significant research efforts on the abatement efficiency of organic contaminants and the ensuing formation of transformation products. This endeavor was accompanied by developments in analytical and computational chemistry, which allowed to improve the mechanistic understanding of ozone reactions. This critical review assesses the challenges of ozonation of impaired water qualities such as wastewaters and provides an up-to-date compilation of the recent kinetic and mechanistic findings of ozone reactions with dissolved organic matter, various functional groups (olefins, aromatic compounds, heterocyclic compounds, aliphatic nitrogen-containing compounds, sulfur-containing compounds, hydrocarbons, carbanions, β-diketones) and antibiotic resistance genes.
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