Decomposition of Acetic Acid Using Multiple Bubble Jets with Pulsed Electrical Discharge

Hideya Nishiyama, Kei Niinuma, Shohei Shinoki, Hidemasa Takana

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The oxidation potential of ozone (2.07 V) is not sufficient to achieve the efficient decomposition of persistent organic pollutants in the conventional water treatment process. Strong oxidizing agents such as OH and O radicals (oxidation potential 2.80 and 2.42 V, respectively) were successfully generated using multiple bubble jets with pulsed electrical discharge and used for the decomposition of acetic acid (CH3COOH), as a model pollutant. The flow dynamics of this novel water treatment process was clarified experimentally. The dynamic behavior of bubble jets with pulsed electrical discharge, streamer propagation along the bubble interface, and radical generation were investigated by high-speed visualization and spectroscopic measurements. The decomposition characteristics of CH3COOH were determined such as applied frequency, the duty ratio of applied voltage, gas flow rate, the initial CH3COOH concentration to achieve the maximum decomposition of CH3COOH, and higher energy efficiency compared to the previous electrical discharge gas–liquid processes.

Original languageEnglish
Pages (from-to)339-354
Number of pages16
JournalPlasma Chemistry and Plasma Processing
Volume35
Issue number2
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Acetic acid decomposition
  • Bubble jets
  • Hydroxyl radicals
  • Persistent organic pollutants
  • Pulsed electrical discharge
  • Water treatment

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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