RT journal article
T1 A detailed kinetic study of the direct photooxidation of 2,4,6-trichlorophenol
A1 Pino-Chamorro, Jose Ángel
A1 Ditrói, Tamás
A1 Lente, Gábor
A1 Fábián, István
A2 Química Analítica
K1 quantitative photochemistry
K1 light intensity dependence
K1 chlorophenols
K1 temperature dependence
K1 photochemical mechanism
K1 kinetics
K1 photodegradation
K1 2,4,6-trichlorophenol
K1 polychromatic light
K1 mechanism of reaction
K1 quantum yield
AB The direct photodegradation of 2,4,6-trichlorophenol (TCP) by UV–vis light was studied in aqueous solution in order to analyze the mechanism of the photochemical process and to determine the kinetic parameters including the quantum yield. Based on initial rate studies at different overall volumes and illumination patterns, it was proved that the rate of the process is directly proportional to the intensity of irradiating light. A significant, but moderate acceleration of the reaction rate with increasing temperature was revealed between 5.0 and 35.0  C, which could be interpreted readily by assuming that the excited state of TCP is involved in two competing processes. High pressure liquid chromatography and mass spectrometry provided us information on the nature of the intermediates and the products formed. 2,6- Dichloro-1,4-benzoquinone, 3,5-dichloro-2-hydroxy-1,4-benzoquinone and 2,6 dihclorohydroxyqui- none were detected as products and/or intermediates, and there were also hints of the formation of 3,5-dichlorobenzene-1,2-diol and 3,5-dichloro-1,2-benzoquinone. A possible degradation mechanism is proposed to interpret the kinetic findings.
PB Elsevier
YR 2016
FD 2016-07
LK http://hdl.handle.net/10498/20354
UL http://hdl.handle.net/10498/20354
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 15-nov-2026