Kinetics of tetrachloroethylene (PCE) gas degradation and by products formation during UV/H2O2 treatment in UV-bubble column reactor

Dzevo Alibegic*, Satoshi Tsuneda, Akira Hirata

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

The UV/H2O2 process is commonly used for the remediation of drinking and groundwater pollution with chlorinated volatile organic compounds. In direct treatment, its efficiency can be lowered in the presence of radical scavengers and/or UV light absorbers. This research is focused on the improvement of the UV/H2O2 photolytic process, due to the reduction of OH radical scavengers and UV absorbers in the reacting system. Degradation of tetrachloroethylene (PCE) gas, which was absorbed into a bubble column reactor equipped with UV light (UV-BCR), containing distilled water and H2O2 as the reacting medium, was studied in a one flow-through mode. Degradation of PCE in the liquid phase was found to follow pseudo-first-order kinetics and apparent rate constants in the order of 0.02 s-1 have been observed. An absorption-reaction model based on slow reaction in the bulk liquid was proposed, and it fitted the experimental data reasonably well. However, when sequence making internal (designed as to prolong the gas pathway through the reactor) was in the system in addition to the relatively high PCE concentrations (500 ppm), production of the byproduct chloroform was observed, indicating that some reaction might have occured in the gas phase. The addition of term for a reaction in the gas phase was able to account for the reaction due to direct absorption of PCE.

本文言語English
ページ(範囲)6195-6203
ページ数9
ジャーナルChemical Engineering Science
56
21-22
DOI
出版ステータスPublished - 2001 11月 23

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 産業および生産工学

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