Abstract
Azo dye is aromatic compound with one or more –N=N- groups. This compound constitutes the largest and most diverse group of synthetic dyes and are widely used in number of industries such as textile, food, cosmetics, leather, pharmaceutical, and paper printing. Azo dyes have the impact of color on various raw material. They are generally difficult to manage biodegradation due to their xenobiotic nature. The physicochemical methods of industrial effluent does not remove the dyes effectively. Microbial decolorization and degradation of azo dyes have more attention because of ecofriendly and inexpensive nature. Thus, microorganisms have developed different enzyme for the decolorization and degradation of azo dyes under certain environmental conditions. This review paper provides an overview of classification, structure, and degradation of azo dyes from the wastewater of textile industry by different enzymatic mechanisms.
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