Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23685
Title: Observations of 2,4,6-trichlorophenol degradation by ozone
Authors: Graham, N
Chu, W 
Lau, C
Keywords: Dechlorination
Humic acid
Hydrogen peroxide
Ozone
Trichlorophenol
Issue Date: 2003
Publisher: Pergamon Press
Source: Chemosphere, 2003, v. 51, no. 4, p. 237-243 How to cite?
Journal: Chemosphere 
Abstract: The aqueous reactivity of 2,4,6-trichlorophenol (TCP) with ozone has been studied at laboratory-scale using a simple gas bubble/liquid contacting system. Degradation rate constants were measured directly and found to be 7.6 and 77.2 M-1s-1 at pH 2 and 7.5, respectively. At pH 7.5, 10 min of ozonation (≡ 15 mM ozone consumption) achieved a 90% degradation of TCP, which corresponded to the release of approximately 2 mol Cl- per mol TCP. The presence of hydrogen peroxide in solution did not significantly increase the TCP degradation but increased the overall dechlorination to 2.7 mol Cl- per mol TCP. The presence of humic acid (HA) in solution was found to enhance the degradation rate of TCP at low relative HA concentrations (<0.6 g/g HA:TCP), but to reduce the rate at higher HA concentrations.
URI: http://hdl.handle.net/10397/23685
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/S0045-6535(02)00815-9
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