Comparison of UV‐Cl and UV‐H2O2 advanced oxidation processes in the degradation of contaminants from water and wastewater: A review

Applications of advanced oxidation processes (AOPs) in water and wastewater treatment have been the subject of growing interest throughout the last decade. Although UV/hydrogen peroxide (UV‐H2O2) is the most established technology among the UV‐AOPs, UV‐chlorine (UV‐Cl) is emerging as a reliable and...

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Published inWater and environment journal : WEJ Vol. 37; no. 4; pp. 633 - 643
Main Authors Farzanehsa, Mahshid, Vaughan, Liam C., Zamyadi, Arash, Khan, Stuart J.
Format Journal Article
LanguageEnglish
Published London Wiley Subscription Services, Inc 01.11.2023
Subjects
Chlorine
Contaminants
Cost effectiveness
Cytotoxicity
Degradation
Disinfection
environment
Genotoxicity
Hydrogen peroxide
Kinetics
Oxidation
reuse
Ultraviolet radiation
wastewater
Wastewater treatment
water
water industry
Water pollution
water quality
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Summary:Applications of advanced oxidation processes (AOPs) in water and wastewater treatment have been the subject of growing interest throughout the last decade. Although UV/hydrogen peroxide (UV‐H2O2) is the most established technology among the UV‐AOPs, UV‐chlorine (UV‐Cl) is emerging as a reliable and potentially more cost‐effective alternative. Recent studies have indicated that UV‐Cl processes may be more efficient and economically favourable for the degradation of some chemicals of emerging concern from contaminated water. Moreover, in terms of the formation of disinfection by‐products (DBPs), UV‐H2O2 seems to have no superiority over UV‐Cl. This said, more investigation in the assessment of genotoxicity and cytotoxicity of DBPs is required. Additionally, more pilot‐scale and full‐scale studies are required to establish UV‐Cl as a reliable alternative to UV‐ H2O2. This paper compares UV‐Cl and UV‐H2O2 AOPs for the degradation of intractable chemicals from water and wastewater based on the practical considerations of efficiency, cost, DBP formation, kinetics and sensitivity to water matrix variability. Finally, various modelling approaches to UV‐Cl have been reviewed. This review showed that UV‐Cl is superior to UV‐H2O2 in terms of degradation efficiency and cost effectiveness and can be a robust alternative in many UV‐AOPs applications.
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ISSN:1747-6585
1747-6593
DOI:10.1111/wej.12868