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Title: Light induced elimination of mono- and polychlorinated phenols from aqueous solutions by PW{sub 12}O{sub 40}{sup 3{minus}}. The case of 2,4,6-trichlorophenol

Abstract

Light induced catalytic decomposition of several moni-, di, and trichlorophenols and phenol in the presence of PW{sub 12}O{sub 40}{sup 3{minus}} in aqueous solutions (pH 1) leads to mineralization of substrates. The method is an example of Advanced Oxidation Processes (AOP) that cause mineralization of organic pollutants through the generation of very active, mainly OH, radicals. Generally, chlorination of phenolic ring enhances the decomposition, whereas the effect of chlorine substituents in the ortho position is less pronounced. However, the rates of decomposition of chlorinated phenols are very much the same. Dioxygen's main function seems to be the regeneration of the catalyst, with limited participation in the initial stages of the photoreactions. A detailed study of 2,4,6-trichlorophenol (2,3,6-TCP) photodecomposition showed that key reactions involved were hydroxylation, substitution of chlorine by OH radicals mainly in the ortho and para positions, and breaking of the aromatic ring. Ring-opened products detected were maleic, oxalic, acetic, and formic acids. Acetic acid has been so far a common intermediate in the photodecomposition of aromatic compounds with this method. The ultimate products were CO{sub 2}, H{sub 2}O, and Cl{sup {minus}}.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Inst. of Physical Chemistry, Athens (GR)
OSTI Identifier:
20080464
Resource Type:
Journal Article
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 34; Journal Issue: 10; Other Information: PBD: 15 May 2000; Journal ID: ISSN 0013-936X
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; REMEDIAL ACTION; CHLORINATED AROMATIC HYDROCARBONS; PHOTOCHEMICAL REACTIONS; CATALYSTS; HYDROXYL RADICALS

Citation Formats

Androulaki, E., Hiskia, A., Dimotikali, D., Minero, C., Calza, P., Pelizzetti, E., and Papaconstantinou, E. Light induced elimination of mono- and polychlorinated phenols from aqueous solutions by PW{sub 12}O{sub 40}{sup 3{minus}}. The case of 2,4,6-trichlorophenol. United States: N. p., 2000. Web. doi:10.1021/es990802y.
Androulaki, E., Hiskia, A., Dimotikali, D., Minero, C., Calza, P., Pelizzetti, E., & Papaconstantinou, E. Light induced elimination of mono- and polychlorinated phenols from aqueous solutions by PW{sub 12}O{sub 40}{sup 3{minus}}. The case of 2,4,6-trichlorophenol. United States. doi:10.1021/es990802y.
Androulaki, E., Hiskia, A., Dimotikali, D., Minero, C., Calza, P., Pelizzetti, E., and Papaconstantinou, E. Mon . "Light induced elimination of mono- and polychlorinated phenols from aqueous solutions by PW{sub 12}O{sub 40}{sup 3{minus}}. The case of 2,4,6-trichlorophenol". United States. doi:10.1021/es990802y.
@article{osti_20080464,
title = {Light induced elimination of mono- and polychlorinated phenols from aqueous solutions by PW{sub 12}O{sub 40}{sup 3{minus}}. The case of 2,4,6-trichlorophenol},
author = {Androulaki, E. and Hiskia, A. and Dimotikali, D. and Minero, C. and Calza, P. and Pelizzetti, E. and Papaconstantinou, E.},
abstractNote = {Light induced catalytic decomposition of several moni-, di, and trichlorophenols and phenol in the presence of PW{sub 12}O{sub 40}{sup 3{minus}} in aqueous solutions (pH 1) leads to mineralization of substrates. The method is an example of Advanced Oxidation Processes (AOP) that cause mineralization of organic pollutants through the generation of very active, mainly OH, radicals. Generally, chlorination of phenolic ring enhances the decomposition, whereas the effect of chlorine substituents in the ortho position is less pronounced. However, the rates of decomposition of chlorinated phenols are very much the same. Dioxygen's main function seems to be the regeneration of the catalyst, with limited participation in the initial stages of the photoreactions. A detailed study of 2,4,6-trichlorophenol (2,3,6-TCP) photodecomposition showed that key reactions involved were hydroxylation, substitution of chlorine by OH radicals mainly in the ortho and para positions, and breaking of the aromatic ring. Ring-opened products detected were maleic, oxalic, acetic, and formic acids. Acetic acid has been so far a common intermediate in the photodecomposition of aromatic compounds with this method. The ultimate products were CO{sub 2}, H{sub 2}O, and Cl{sup {minus}}.},
doi = {10.1021/es990802y},
journal = {Environmental Science and Technology},
issn = {0013-936X},
number = 10,
volume = 34,
place = {United States},
year = {2000},
month = {5}
}