Enhanced degradation of benzo[a]pyrene and toxicity reduction by microbubble ozonation

Gwiwoong Nam, Mohamed M. Mohamed, Jinho Jung

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The microbubble technique has drawn great attention for efficient utilization of ozone for advance oxidation processes. Therefore, in this study, microbubble ozonation was investigated to evaluate the removal efficiency and toxicity reduction of benzo[a]pyrene. Compared with conventional macrobubble ozonation, microbubble ozonation produced higher concentrations of hydroxyl radicals and ozone in aqueous solutions, resulting in more efficient and persistent degradation of benzo[a]pyrene. Moreover, microbubble ozonation completely removed the acute toxicity of benzo[a]pyrene to Daphnia magna, whereas the toxicity reduction by macrobubble ozonation was not consistent owing possibly to toxic degradation products. These findings suggest that microbubble ozonation is a promising technique in terms of both chemical degradation and toxicity reduction of organic pollutants.

Original languageEnglish
Pages (from-to)1853-1860
Number of pages8
JournalEnvironmental Technology (United Kingdom)
Issue number12
Publication statusPublished - 2021

Bibliographical note

Funding Information:
This work was supported by a Korea University [grant number K1920931] and United Arab Emirates University National Water Center [grant number 31R112].

Publisher Copyright:
© 2019 Informa UK Limited, trading as Taylor & Francis Group.


  • Acute toxicity
  • benzo[a]pyrene
  • degradation
  • microbubble
  • ozonation

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal


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