Sonochemical degradation of POPs in model sediment

Jun Liang, Shengli Wu, Naohito Hayashi, Hiromi Choshi, Eiki Kasai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The potential of hexachlorobenzen (HCB), one of POPs, decomposition by ultrasonic irradiation and its combination with other AOPs (advanced chemical oxidation processes) and surfactant addition was evaluated. Comparing the ultrasonic irradiation alone with the combination with the UV (ultraviolet) light irradiation, the degradation ratios were almost the same, 40.0% and 39.7%, respectively. On the other hand, the degradation ratio increased to 49.4% when combining with photocatalysis possibly attributed to the promotion of the cavitation due to the addition of TiO2 particles. When the surfactant concentration was increased to 0.1%, the degradation ratio increased to 49.2%. It seemed that the added surfactant could contribute to desorbing HCB from the sediment surface and increasing the effective reaction surface area. The degradation ratio of HCB under the dual-frequency ultrasonic irradiation was higher than that under the mono-frequency ultrasonic irradiation. After 1 h ultrasonic irradiation, the degradation ratio was 57.5% for the dual-frequency ultrasound of 20/176 kHz combination, whereas 3.67% and 41.0% for 20 and 176 kHz ultrasound, respectively.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
JournalBeijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing
Volume29
Issue numberSUPPL. 2
Publication statusPublished - 2007 Dec 1

Keywords

  • Advanced chemical oxidation processes (AOPs)
  • Hex-achlorobenzene
  • POPs
  • Sonochemical decomposition

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Sonochemical degradation of POPs in model sediment'. Together they form a unique fingerprint.

  • Cite this