Welcome To BCPR Journal | Bulletin Of Chemical and Pharmaceutical Research
- Author(s): Derin Mary Thomas and A. S. Arun Prasad
- Category: Current Issues
- Published: 01 June 2016
- Views: 170
Bull. Chem. Pharm. Res., 2016, 2(2), 1-10.
Abstract: The continuous development of industries has resulted in the increase of wastewater leading to consequential decline in levels and quality of natural water in the ecosystem. The textile industries have increased in many of the countries and have shown a significant increase in the use of synthetic complex organic dyes as colouring material. Release of waste waters from the textile industries is a problem in many parts of the world especially the discharge of coloured effluents into the environment is undesirable as many of the dyes and their breakdown products are toxic or mutagenic. Azo dyes are commonly used in textile industries and due to their complex structure they are highly persistent in natural environments. Most of the physicochemical dye removal methods generally used for effluent treatment have many limitations. The treatment of textile dyeing wastewaters has become a challenging task. Microbial decolorization and metabolism of azo dyes has long been known and bioremediation technology has attracted interest. This review paper discusses the abilities of diverse categories of microorganisms (bacteria, yeasts and fungi) in decolorizing and degrading structurally different azo dyes under varying physiochemical conditions. This review also discusses different conditions for azo dye decolorization (aerobic, anaerobic and anoxic) and the various mechanisms adopted by the microbes for metabolism of azo dyes.