Chapter 8: Sulfate Radical-based Advanced Oxidation Processes for Water and Wastewater Disinfection
Published:25 Mar 2022
R. Yin, W. Liu, and D. Xia, in Persulfate-based Oxidation Processes in Environmental Remediation, ed. M. Zhu, Z. Bian, and C. Zhao, The Royal Society of Chemistry, 2022, ch. 8, pp. 211-228.
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Sulfate radical (SO4˙−)-based advanced oxidation processes (AOPs) have emerged as promising technologies for inactivation of pathogenic microorganisms in water and wastewater, due to the high oxidation potential and selectivity of SO4˙− towards different microorganisms, and the negligible formation of undesired byproducts by using these processes. This book chapter provides an overview of the kinetic responses of various pathogenic/indicator microorganisms toward different SO4˙− based AOPs (e.g., metal-assisted, light-assisted, and piezo-catalytic ones) and the mechanisms responsible for the inactivation (e.g., via membrane destruction, enzyme and genome damage, and affecting repair that doesn't need light). The effects of solution chemistry (e.g., pH, temperature, and various water matrices) on the disinfection efficacies have also been reviewed and discussed. The formation of undesired byproducts in the SO4˙− based AOPs is also reviewed and discussed. Key points from the review are summarized in the conclusive remarks. Knowledge gaps, research needs, and design requirements for the engineering applications of these processes in real-world practice are proposed as future perspectives.