Decomposition rate of volatile organochlorines by ozone and utilization efficiency of ozone with ultraviolet radiation in a bubble-column contactor

Hayashi Jun-Ichiro, Joji Ikeda, Katsuki Kusakabe, Shigeharu Morooka

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Decomposition of volatile chlorohydrocarbons in the gas and aqueous phases is tested in a thin, rectangular-channel reactor. In the absence of u.v. irradiation, destruction of pollutants in the gas phase hardly occurs, while there is a little in the aqueous phase. Ultraviolet irradiation accelerates the destruction of pollutants in both the gas and aqueous phases, and the destruction rate is proportional to the concentration of reactants and the u.v. intensity. To evaluate the effect of reactor configuration and operational conditions on the performance of the actual water treatment process, a bubble column equipped with a diffuse lamp along the central axis is adopted as a model reactor. The conversion of volatile chlorohydrocarbons and the ozone utilization efficiency are calculated by considering the mass transfer of ozone and pollutants between the gas and aqueous phases, and the self-decomposition of ozone and destruction rate of pollutants in each phase under u.v. irradiation. A simulation on the basis of the experimental data obtained predicts that excessive u.v. radiation decomposes ozone in the gas phase before it is transferred into the aqueous phase, causing a decrease in the utilization efficiency of ozone.

Original languageEnglish
Pages (from-to)1091-1097
Number of pages7
JournalWater Research
Volume27
Issue number6
DOIs
Publication statusPublished - Jan 1 1993

Fingerprint

Bubble columns
ultraviolet radiation
organochlorine
Ultraviolet radiation
Ozone
bubble
ozone
decomposition
Decomposition
Gases
irradiation
gas
pollutant
Irradiation
Water treatment
Electric lamps
mass transfer
water treatment
Mass transfer
rate

All Science Journal Classification (ASJC) codes

  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

Decomposition rate of volatile organochlorines by ozone and utilization efficiency of ozone with ultraviolet radiation in a bubble-column contactor. / Jun-Ichiro, Hayashi; Ikeda, Joji; Kusakabe, Katsuki; Morooka, Shigeharu.

In: Water Research, Vol. 27, No. 6, 01.01.1993, p. 1091-1097.

Research output: Contribution to journalArticle

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