Review of plasma-based water treatment technologies for the decomposition of persistent organic compounds

The establishment of economical and eco-friendly technologies for water treatment is a crucial issue for the realization of a sustainable society. Plasma-based treatments are promising methods for the decomposition of persistent organic compounds. This progress report summarizes recent improvements...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2021-01, Vol.60 (SA), p.SA0801
Main Authors: Takeuchi, Nozomi, Yasuoka, Koichi
Format: Article
Language:English
Subjects:
Acetic acid
Chemical reactions
Decomposition
Hydrogen peroxide
Interface reactions
Optimization
Organic compounds
persistent organic compound
Physical properties
Plasma
plasma in contact with liquid
plasma/ozone combination process
Sulfonic acid
Surfactants
Water treatment
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Summary:The establishment of economical and eco-friendly technologies for water treatment is a crucial issue for the realization of a sustainable society. Plasma-based treatments are promising methods for the decomposition of persistent organic compounds. This progress report summarizes recent improvements to plasma-based water treatment technologies by focusing on two types of contaminated solutions: solutions containing high concentrations of acetic acid and solutions containing surfactants, such as perfluorooctane sulfonic acid. Decomposition processes were analyzed based on chemical and physical characteristics, such as chemical reactions, the transportation of reactive species, and characteristics of target compounds. When treating solutions containing acetic acid, the optimization of bulk reactions involving ozone, which regenerates OH radicals from hydrogen peroxide, is a key factor for achieving high decomposition rates and energy efficiency. In contrast, the treatment of surfactants involves interfacial reactions at the plasma-liquid interface, where the accumulation of surfactants is a major concern.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/abb75d