Biodegradation of bioaccessible textile azo dyes by Phanerochaete chrysosporium |
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Authors: | Martins M A Ferreira I C Santos I M Queiroz M J Lima N |
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Institution: | Institute of Biotechnology and Fine Chemistry (IBQF), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal |
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Abstract: | Azo dyes are important chemical pollutants of industrial origin. Textile azo dyes with bioaccessible groups for lignin degrading fungi, such as 2-methoxyphenol (guaiacol) and 2,6-dimethoxyphenol (syringol), were synthesised using different aminobenzoic and aminosulphonic acids as diazo components. The inocula of the best biodegradation assays were obtained from a pre-growth medium (PAM), containing one of the synthesised dyes. The results of the dye biodegradation assays were evaluated every 7 days, by the decrease of the absorbance at the maximum wavelength of the dye, by the decrease of the sucrose concentration in the culture medium and by the increase of the biomass during the 28 days of assay. It was observed that the extent of dye biodegradation depended on the sucrose concentration, on the degraded dye structure and, on the dye present in the PAM medium. |
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Keywords: | Azo dyes Chemical structure/extent of biodegradation Bioaccessibility White rot fungus Phanerochaete chrysosporium |
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