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Degradation of Azo Dyes by Trametes villosa Laccase over Long Periods of Oxidative Conditions

Degradation of Azo Dyes by Trametes villosa Laccase over Long Periods of Oxidative Conditions,10.1128/AEM.71.11.6711-6718.2005,Applied and Environment

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Degradation of Azo Dyes by Trametes villosa Laccase over Long Periods of Oxidative Conditions   (Citations: 34)
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The chemical structure of dyes is comprised of a conjugated system of double bonds and aromatic rings. The major classes of dyes have antroquinoid, indigoid, and azo aromatic struc- tures. All of these structures allow strong -* transitions in the UV-visible (UV-Vis) area, with high extinction coefficients that allow us to consider these structures dye chromophores. Of all of these structures, the azo aromatic one is the most widespread dye class in the industry. The main drawback of this class of dyes is that they are not easily degraded by aerobic bacteria, and with the action of anaerobic or microaerobic reductive bacteria, they can form toxic and/or mutagenic com- pounds such as aromatic amines (9, 10, 34). There is a great environmental concern about the fate of these dyes, with spe- cial emphasis on reactive dyeing of cellulosic fibers, where large amounts of unbound dye are discharged in the effluent (24).
Journal: Applied and Environmental Microbiology - AEM , vol. 71, no. 11, pp. 6711-6718, 2005
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