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- W2015676587 abstract "The degradation reactions of two monoazo pigments, namely, Red 53:1 and Red 48:2, by Fenton, photo-Fenton and UV/H2O2 systems have been studied. The efficiencies of the Fenton reactions increased with temperature, but the formation of solid agglomerates was observed when the reactions were carried out above 50°C indicating a coagulant action of Fe+2 or Fe+3. Photo-Fenton reactions irradiated by sunlight presented the best rate constants for cleavage of the azo bond and the naphthalene rings. The UV/H2O2 system exhibited the highest efficiency with respect to the consumption of H2O2. The presence of a carbonyl group in the ortho position of the naphthol ring hampered the oxidation of pigment Red 48:2 by hydroxyl radicals. This finding may be explained in terms of the acceptor character of the COOH group, and suggests the formation of a complex containing two six-membered rings between Fe+3 and the pigment molecule." @default.
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- W2015676587 date "2009-10-01" @default.
- W2015676587 modified "2023-10-04" @default.
- W2015676587 title "Degradation of Monoazo Pigments Red 53:1 and Red 48:2 by Fenton, Photo-Fenton and UV/Peroxide Reactions" @default.
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- W2015676587 doi "https://doi.org/10.1002/clen.200900108" @default.
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