Mechanism of Reactive Orange 16 degradation with the white rot fungus Irpex lacteus |
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Institution: | 1. Department of Pure and Applied Botany, College of Biosciences, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria;2. Department of Botany, University of Lagos, Lagos State, Nigeria;3. Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea |
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Abstract: | The study focuses on the Reactive Orange 16 (RO16) degradation products obtained by fungal treatment of the dye. Eighty percent of dye decolorization was achieved within 24 h by Irpex lacteus cultures immobilized on polyurethane foam (PUF). Dye degradation products were investigated using LC–MS analysis. Three compounds were identified as the dye intermediates: 6-acetamido-3,4-dioxo-3,4-dihydronaphthalene-2-sulfonate (m/z 294), (E)-2-(4-acetamidophenyl)-1-carboxyethenesulfonate (m/z 284), and 4-(2-hydroxyethylsulfonyl)phenolate (m/z 201). Despite significant laccase activities detected in the fungal cultures, no backward polymerization of the reaction products resulting in recurrent colorization was observed after fungal treatment of the dye solution. |
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