Chemistry

Biodegradation of Azo Dyes by Azeem Khalid, Muhammad Arshad, David Crowley (auth.), Hatice

By Azeem Khalid, Muhammad Arshad, David Crowley (auth.), Hatice Atacag Erkurt (eds.)

Azo dyes play a big function as coloring brokers within the cloth, meals, and pharmaceutical undefined. because of the toxicity, mutagenicity and carcinogenicity of azo dyes and their breakdown items, their elimination from business wastewaters has been an pressing problem. Promising and in your price range equipment are in accordance with their biodegradation, that is taken care of during this quantity. the themes provided by way of specialists within the box contain: the class of azo dyes; toxicity attributable to azo dyes; cardio and anaerobic azo dye biodegradation mechanisms; the function of micro organism, fungi, algae and their enzymes in biodegradation; the influence of redox mediators on azo dye relief; the mixing of organic with actual and chemical approaches; the biotransformation of fragrant amines; reactor modelling for azo dye conversion; the biodegradation of azo dyes by way of immobilized micro organism and fungi; and components affecting the full mineralization of azo dyes.

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Bioaugmentation of Azo Dyes 19 Table 4 Biodegradation of azo dyes and their intermediates by mixed microbial cultures Dyes/Metabolites Culture Comments References Anaerobic digester Decolorization ranging from 65– [175] Acid Orange 10, sludge and 90% was observed in a two-stage Acid Red 14 aeration tank anaerobic–aerobic fixed film and 18 mixed liquor fluidized bed activated sludge reactor Acid Orange 7 Sludge originally Color removal of 96% was achieved [176] collected from a in the presence of liposomes that pulp and paper facilitated uptake of dyes by wastewater anaerobic biomass, leading to a treatment plants fast decolorization.

A dye-decolorizing bacterium isolated from activated sludge of a wastewater treatment plant. Int J Syst Evol Microbiol 55:363–368 86. Pearce CI, Christie R, Boothman C et al (2006) Reactive azo dye reduction by Shewanella strain J18 143. Biotechnol Bioengin 95:692–703 87. Fan L, Zhu S, Liu D, Ni J (2009) Decolorization of 1-amino-4-bromoanthraquinone-2sulfonic acid by a newly isolated strain of Sphingomonas herbicidovorans. Int Biodeter Biodegr 63:88–92 88. Chang JS, Chen BY, Lin YC (2004) Stimulation of bacterial decolorization of an azo dye by extracellular metabolites from Escherichia coli strain NO3.

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