New Iodine-based Electrochemical Advanced Oxidation System for Water Disinfection: Are Disinfection By-products a Concern?

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dc.contributor.authorVerwold, Chad
dc.contributor.authorOrtega-Hernandez, Alejandro
dc.contributor.authorMurakami, Jillian
dc.contributor.authorPatterson-Fortin, Laura
dc.contributor.authorBoutros, Jenny
dc.contributor.authorSmith, Richard
dc.contributor.authorKimura, Susana Y.
dc.date.accessioned2023-02-06T18:35:02Z
dc.date.available2023-02-06T18:35:02Z
dc.date.issued2021-06-23
dc.description.abstractA novel electrochemical Advanced Oxidation System (AOS) has been recently developed for water disinfection where iodide is used to generate active iodine species in-situ. However, the presence of iodide during water disinfection can lead to the formation of iodinated disinfection byproducts (I-DBPs), which have been shown to be more cyto- and genotoxic than their chlorinated and brominated analogs. In this study, the formation of DBPs was assessed in ultrapure water, river water and secondary wastewater effluents treated by the AOS. A comprehensive total organic halogen and target DBP analysis was used that included 25 unregulated DBPs, and the total organic halogen (TOX) quantified as total organic chlorine (TOCl), total organic bromine (TOBr), and total organic iodine (TOI). Ultrapure water disinfection only quantified iodoform (TIM) at a maximum concentration of 0.90 ± 0.05 µg/L. River water results show that TOI increase from 1.3 ± 0.3 µg/L before disinfection (t=0) to a maximum of 3.5 ±1.1 µg/L. TIM and bromodiiodomethane (BDIM) were the only targeted iodo-trihalomethanes (I-THMs) that were quantified with a maximum total I-THM concentration of 0.44 µg/L. Secondary wastewater effluent disinfection results show that TOI increased from 1.8 ± 0.3 µg/L (t=0) to a maximum concentration of 35.3 ± 0.3 µg/L. Iodide and iodate were the main iodinated species exiting the AOS system with a iodine recovery of 94-101%. The results from this study show that the AOS formed low levels of iodinated DBPs in treated water sources that are comparable to the levels found in disinfected drinking water and wastewater.en_US
dc.description.grantingagencyNatural Sciences and Engineering Research Council (NSERC)en_US
dc.identifier.citationVerwold, C., Ortega-Hernandez, A., Murakami, J., Patterson-Fortin, L., Boutros, J., Smith, R., & Kimura, S. Y. (2021). New iodine-based electrochemical advanced oxidation system for water disinfection: Are disinfection by-products a concern? Water Research, 201, 117340. https://doi.org/10.1016/j.watres.2021.117340en_US
dc.identifier.urihttp://hdl.handle.net/1880/115815
dc.identifier.urihttps://dx.doi.org/10.11575/PRISM/40711
dc.language.isoengen_US
dc.publisherElsevier; IWA Publishingen_US
dc.publisher.departmentChemistryen_US
dc.publisher.facultyScienceen_US
dc.publisher.institutionUniversity of Calgaryen_US
dc.publisher.policyhttps://www.elsevier.com/journals/water-research/0043-1354/open-access-optionsen_US
dc.rightsUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectDisinfection by-productsen_US
dc.titleNew Iodine-based Electrochemical Advanced Oxidation System for Water Disinfection: Are Disinfection By-products a Concern?en_US
ucalgary.item.requestcopytrueen_US
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