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Degradace syntetických barviv pomocí Phanerochaete chrysosporium
 Blahutová, Andrea
Azo dyes are the most important and largest group of commercially produced synthetic dyes. Their degradation by white-rot fungi Phanerochaete chrysosporium is induced by a lignin-degrading enzyme system, which is capable of degrading xenobiotic compounds. This bachelor thesis focuses on the degradation of the five most commonly used azo dyes by Phanerochaete chrysosporium. The process has been monitored not only on individual dyes (E102 Tartrazine, E110 Yellow, E122 Azorubin, E124 Ponceau 4R and E123 Amaranth), but also on two alimentary products (Vitacit – lemon and Vitacit – strawberry) containing E102 Tartrazine or E122 Azorubin azo dye. The absorbance of the solutions was measured spectrophotometrically at four-day intervals across a twenty-day cultivation period. The color loss was calculated based on the recorded values and the results were expressed as a percentage of decolorization. At the end of the measurement, the Azorubin dye showed the highest decolorization (90 %), whether the Ponceau 4R dye was decolorized the least (20 %). The level of decolorization of the powdered beverage solutions was compared with the decolorization of the individual dyes. The degradation was mainly effected by the various azo dyes structure. The composition of powdered beverages also played a role in their degradation.
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