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Frontiers of Environmental Science & Engineering in China : Volume 1, Issue 1, February 2007

Pathway of the ozonation of 2,4,6-trichlorophenol in aqueous solution

Content Provider	Springer Nature Link
Author	Pi, Yunzheng Wang, Jianlong
Copyright Year	2007
Abstract	The reaction mechanism and pathway of the ozonation of 2,4,6-trichlorophenol (2,4,6-TCP) in aqueous solution were investigated. The removal efficiency and the variation of H$_{2}$O$_{2}$, Cl$^{−}$ formic acid, and oxalic acid were studied during the semi-batch ozonation experiments (continuous for ozone gas supply, fixed volume of water sample). The results showed that when there was no scavenger, the removal efficiency of 0.1 mmol/L 2,4,6-TCP could reach 99% within 6 min by adding 24 mg/L ozone. The reaction of molecular ozone with 2,4,6-TCP resulted in the formation of H$_{2}$O$_{2}$. The maximal concentration of H$_{2}$O$_{2}$ detected during the ozonation could reach 22.5% of the original concentration of 2,4,6-TCP. The reaction of ozone with H$_{2}$O$_{2}$ resulted in the generation of a lot of OH• radicals. Therefore, 2,4,6-TCP was degraded to formic acid and oxalic acid by ozone and OH• radicals together. With the inhibition of OH• radicals, ozone molecule firstly degraded 2,4,6-TCP to form chlorinated quinone, which was subsequently oxidized to formic acid and oxalic acid. Two reaction pathways of the degradation of 2,4,6-TCP by ozone and O$_{3}$/OH• were proposed in this study.
Starting Page	179
Ending Page	183
Page Count	5
File Format	PDF
ISSN	16737415
Journal	Frontiers of Environmental Science & Engineering in China
Volume Number	1
Issue Number	2
e-ISSN	16737520
Language	English
Publisher	Higher Education Press
Publisher Date	2007-01-01
Publisher Institution	Chinese Universities
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	2,4,6-trichlorophenol ozone hydrogen peroxide hydroxyl radicals reaction pathway Environment
Content Type	Text
Resource Type	Article
Subject	Environmental Science

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