Aqueous bromide oxidized with pulsed corona discharge

Bromide in treated natural waters is oxidized to toxic bromate with ozone. For the novelty of pulsed corona discharge (PCD) in water treatment, it's potential in bromide transformation needs clarification. Experimental research into bromide-bromate conversion dependent on control parameters, in...

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Bibliographic Details
Published in:Journal of electrostatics 2024-12, Vol.132, p.103978, Article 103978
Main Authors: Petrochenko, Irina, Preis, Sergei
Format: Article
Language:English
Subjects:
Advanced oxidation process
Bromate
Electric discharge
Hypobromite
Hypobromous acid
Ozone
Plasma
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Summary:Bromide in treated natural waters is oxidized to toxic bromate with ozone. For the novelty of pulsed corona discharge (PCD) in water treatment, it's potential in bromide transformation needs clarification. Experimental research into bromide-bromate conversion dependent on control parameters, including pulse repetition frequency, pH, Br− concentration, and presence of organics, was undertaken. Bromide transformed to bromate in acidic and circum-neutral media; transformation of bromate to bromide was also observed. Bromide was poorly oxidized in alkaline media. Oxidation of bromide was obstructed with oxalate. Formation of nitrate was noticeably decelerated by bromate. [Display omitted] •Pulsed corona discharge (PCD) reversibly oxidize bromide in acidic and neutral media.•Bromate and hypobromous forms are bromide oxidation products.•Oxalate reduces bromide PCD oxidation ruling out hypobromite in neutral media.•In acidic media, bromate formation was reduced two-fold with oxalic acid.•Aqueous bromate strongly inhibit nitrate formation in air PCD.
ISSN:0304-3886
DOI:10.1016/j.elstat.2024.103978