Surfactant and non-surfactant radical scavengers in aqueous reactions induced by pulsed corona discharge treatment

The choice of energy input rate in treatment of aqueous media with gas-phase pulsed corona discharge (PCD) requires quantification of reactive oxygen species (ROS) reactions dependent on oxidation kinetics. The role of surfactant and non-surfactant OH-radical scavengers in PCD was studied in respect...

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Bibliographic Details
Published inJournal of electrostatics Vol. 98; pp. 82 - 86
Main Authors Wang, Yi-Xian, Kornev, Iakov, Wei, Chao-Hai, Preis, Sergei
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2019
Subjects
Advanced oxidation
Bicarbonate
Electric discharge
Energy efficiency
Humic substances
Oxalate
Oxalic acid
Phenol
Plasma
Water treatment
Bicarbonate
Plasma
Water treatment
Phenol
Advanced oxidation
Oxalic acid
Oxalate
Energy efficiency
Humic substances
Electric discharge
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Summary:The choice of energy input rate in treatment of aqueous media with gas-phase pulsed corona discharge (PCD) requires quantification of reactive oxygen species (ROS) reactions dependent on oxidation kinetics. The role of surfactant and non-surfactant OH-radical scavengers in PCD was studied in respect of oxidation of phenol, oxalic and humic acid. Phenol reacts fast, whereas oxalate is known to selectively react with OH-radicals. Humic acid oxidation is slow. Rapid energy intake is advised for oxidation induced exclusively by radical reactions, such as humics, whereas abatement of admixtures reacting with both surface-borne and long-living oxidants benefits from reduced pulse repetition frequency. [Display omitted] •Reactive oxygen species differentiated with surfactant and non-surfactant radical scavengers.•Surface-borne reactions dominate in water treated with pulsed corona discharge.•Lower pulse frequency is energy-efficient in oxidation of rapidly reacting compounds.•Oxidation of refractory substances benefits from high pulse frequency treatment.
ISSN:0304-3886
1873-5738
DOI:10.1016/j.elstat.2019.03.001