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J Hazard Mater. 2006 Jun 30;134(1-3):45-59. Epub 2005 Dec 1.

Photo-degradation of chlorophenols in the aqueous solution.

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Institute of Non-Ferrous of Metals, 44-100 Gliwice, SowiƄskiego St. 5, Poland.


The review presents the chlorophenols photo-degradation kinetics and mechanism in the aquatic environment under UV-vis in the presence of hydroxyl radicals and singlet oxygen. The influence of experimental parameters e.g. pH, dissociation degree, presence of oxidants in solution, number and position of Cl atoms on the quantum yield and reaction rate constant of chlorophenols are discussed. Mechanisms of photolysis, reaction with hydroxyl radicals, singlet oxygen and secondary reactions for mono-, di-, tri-, tetra- and pentachlorophenol are proposed. The pathways for intermediate reactions e.g. dechlorination, oxidation, dimerization for chlorophenols are also presented.

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