Bacterial decolorization and degradation of azo dyes: A review

Saratale, Rijuta Ganesh; Saratale, Ganesh Dattatraya; Chang, Jo‐Shu; Govindwar, Sanjay P.

doi:10.1016/j.jtice.2010.06.006

Cited by 1,317 publications

(720 citation statements)

References 199 publications

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“…Telke et al (2009) reported a novel enzyme, a laccase-like phenol oxidase that has the ability to react with non-phenolic substrates. Lignin peroxidase catalyzes the depolymerization of methylated lignin in dye degradation process (Saratale et al, 2009(Saratale et al, , 2011.…”

Section: Oxidative Enzymesmentioning

confidence: 99%

“…Many dyes are not easily degraded by either biological or physical treatment (Hsueh et al, 2009) and physico-chemical methods can produce additional waste products that makes use of these methods impractical (Sharma et al, 2013). For this reason, complete mineralization of dyes using microorganisms is an attractive option that takes advantage of the metabolic versatility of microorganisms that can target broad classes of dye chemicals (Khalid et al, 2012;Mohanty et al, 2006;Sadettin & Donmez, 2007;Saratale et al, 2011). A variety of bacteria, fungi and algae are able to degrade azo compounds via reductive and oxidative enzymes, many of which function over the range of environmental conditions relevant to wastewater treatment (Prasad & Aikat, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Bacterial diversity and composition in major fresh produce growing soils affected by physiochemical properties and geographic locations

Ibekwe

Yang

et al. 2016

Science of The Total Environment

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Azo dyes and their intermediate degradation products are common contaminants of soil and groundwater in developing countries where textile and leather dye products are produced. The toxicity of azo dyes is primarily associated with their molecular structure, substitution groups and reactivity. To avoid contamination of natural resources and to minimize risk to human health, this wastewater requires treatment in an environmentally safe manner. This manuscript critically reviews biological treatment systems and the role of bacterial reductive and oxidative enzymes/processes in the bioremediation of dye-polluted wastewaters. Many studies have shown that a variety of culturable bacteria have efficient enzymatic systems that can carry out complete mineralization of dye chemicals and their metabolites (aromatic compounds) over a wide range of environmental conditions. Complete mineralization of azo dyes generally involves a two-step process requiring initial anaerobic treatment for decolorization, followed by an oxidative process that results in degradation of the toxic intermediates that are formed during the first step. Molecular studies have revealed that the first reductive process can be carried out by two classes of enzymes involving flavin-dependent and flavin-free azoreductases under anaerobic or low oxygen conditions. The second step that is carried out by oxidative enzymes that primarily involves broad specificity peroxidases, laccases and tyrosinases. This review focuses, in particular, on the characterization of these enzymes with respect to their enzyme kinetics and the environmental conditions that are necessary for bioreactor systems to treat azo dyes contained in wastewater.

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Section: Oxidative Enzymesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bacterial diversity and composition in major fresh produce growing soils affected by physiochemical properties and geographic locations

Ibekwe

Yang

et al. 2016

Science of The Total Environment

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“…They are an important and largest class of synthetic dyes extensively used in textile industries (Vandevivere et al 1998). Nearly 60-70 % of all textile dyestuffs contain azo dyes, thus making them the largest group to be emitted into the environment (Saratale et al 2011). During the dyeing process, approximately 10-15 % of the dyes used remain unbound and are released with the wastewater; they are resistant to fading, water and many chemicals due to their complex structures (Robinson et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of azo dye Direct Orange 16 by Micrococcus luteus strain SSN2

Singh

Chatterji

Nandini

et al. 2014

Int. J. Environ. Sci. Technol.

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In the present study, the decolorization and degradation of azo dye Direct Orange 16 (DO-16) by a potential bacterial isolate isolated from textile effluent were evaluated. Through 16S rRNA sequence matching, the potential isolate was identified as Micrococcus luteus strain SSN2. The effects of various factors (pH, temperature, salt and dye concentration) on decolorization were investigated. The strain SSN2 had the ability to decolorize DO-16 with 96 % efficiency at pH 8, 37°C and 3 % NaCl in a short time of 6 h under static conditions. DO-16 decolorization was assessed by UV-Vis spectrophotometer with gradual decrease of dye peak intensity at 430 nm (k max ). Analytical techniques (thin-layer chromatography, Fourier transform infrared spectroscopy and high-performance liquid chromatography) further confirmed that biodegradation of DO-16 was due to reduction of the azo bond. The phytotoxicity assay (with respect to seeds of Vigna mungo and Vigna radiata) demonstrated the less toxic nature of the DO-16-degraded products compared to the toxic azo dye.

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“…Ligninolytic enzymes have found their applications in treatment of pollutant bearing wastewaters due to their ability to act on variety of substrates including textile dyes. Among the synthetic dyes, azo dyes are extensively used in textile, leather, paper, cosmetics, food and pharmaceutical industries (Saratale et al, 2011, Dellamtrice et al, 2017. Azo dyes are the most common synthetic dyes released into the environment during their usage (Saratale et al, 2009).…”

Section: …………………………………………………………………………………………………… Introduction:-mentioning

confidence: 99%

Solid State Fermentation of Wheat Straw for Production of MNP by P. Chrysoporium MTCC 787.

Junnarkar¹,

Pandhi²

2017

IJAR

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Solid state fermentation of wheat straw was attempted with P. chrysosporium MTCC 787 for production of MnP at 39ºC. Fermented residue was extracted with 0.2 M sodium tartarate buffer (pH 3) and was subjected to ammonium sulfate precipitation. Precipitates obtained were subjected to MnP assay, upon dialysis, using MBTH and DMAB as substrate. Optimum pH and temperature were reported to be pH 4.5 and 30ºC respectively. Km and Vmax of MnP for MBTH were found to be 0.05 mM and 25 U/mg, respectively. Enzyme kinetics were also assessed against Reactive Black B (RBB), a widely used textile diazo dye, as substrate. Km and Vmax of MnP for RBB were reported as 0.2 mM and 7 U/mg, respectively. These findings suggest enormous potential of MnP of P. chrysosporium MTCC 787 for its application in treatment of RBB containing wastewater.

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Bacterial decolorization and degradation of azo dyes: A review

Cited by 1,317 publications

References 199 publications

Bacterial diversity and composition in major fresh produce growing soils affected by physiochemical properties and geographic locations

Bacterial diversity and composition in major fresh produce growing soils affected by physiochemical properties and geographic locations

Biodegradation of azo dye Direct Orange 16 by Micrococcus luteus strain SSN2

Solid State Fermentation of Wheat Straw for Production of MNP by P. Chrysoporium MTCC 787.

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