Microbial decolorization and degradation of synthetic dyes: a review

Khan, R. M.; Bhawana, Pathak; Fulekar, M. H.

doi:10.1007/s11157-012-9287-6

Cited by 373 publications

(180 citation statements)

References 144 publications

Supporting

Mentioning

171

Contrasting

Unclassified

Order By: Relevance

“…Biological treatment may present a relatively inexpensive and environment-friendly alternative producing less sludge and requiring lesser amount of reagents. Besides being economical in nature, it can lead to complete mineralization of dyes (Pandey et al 2007;Rai et al 2005;Khan et al 2013). Removal of pollutants from the environment by biological methods has significant advantages over other methods because of the adaptability of various micro-organisms in degrading various compounds.…”

Section: Decolourization and Degradation Of Dyes By Various Methodsmentioning

confidence: 99%

“…Different substitutions on aromatic nucleus give structurally diverse and most versatile group of compounds which makes them recalcitrant and xenobiotic (Ali 2010). These complex aromatic substituted structures make conjugated system and are responsible for intense colour, high water solubility, and resistance to degradation of azo dyes under natural conditions (Khan et al 2013;Senthikumar et al 2012). Figure 1 gives an illustration of the chemical structure of several azo dyes widely reported in the published literature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Popli

Patel

2014

Int. J. Environ. Sci. Technol.

270

View full text Add to dashboard Cite

Dyes are synthetic organic compounds widely used in various industries such as, textile, leather, plastic, food, pharmaceutical, and paints manufacturing industries. Coloured effluents are highly toxic to the aquatic life and mutagenic to humans. Wastewater containing dyes has become an important issue demanding serious attention. Among the synthetic dyes, azo dyes are the largest and most widely used dyes and account for more than half of the annually produced dyes. The biodegradation of azo dyes is difficult due to their complex structure and synthetic nature. Several treatments have been proposed for efficient azo dye removal, most of them presenting some limitations such as generation of waste sludge, high operational costs, poor efficiency, and incomplete mineralization. Biological treatment is a cost-effective and eco-friendly process for dye degradation. Sequential anaerobic-aerobic biological treatment is considered as one of the most cost-effective methods for the complete mineralization of azo dyes. The anaerobic stage yields decolourization through reductive cleavage of the dye's azo linkages, resulting in the formation of generally colourless but potentially hazardous aromatic amines. The aerobic stage involves degradation of the aromatic amines. It is the most logical step for removing the azo dyes from the wastewater. Several factors can influence the microbial activity and consequently the efficacy and effectiveness of the complete biodegradation processes. This paper summarizes the results of biological decolourization of azo dyes using various types of reactors, elaborates biochemical mechanisms involved, and discusses influence of various operational parameters on decolourization based on reports published in the last decade.

show abstract

Section: Decolourization and Degradation Of Dyes By Various Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Popli

Patel

2014

Int. J. Environ. Sci. Technol.

270

View full text Add to dashboard Cite

show abstract

“…Microorganisms are able to degrade synthetic dyes to noncoloured compounds or even mineralize them completely under certain environmental conditions Bioremediation is one of the most effective and successful cleaning techniques for the removal of toxicants from polluted environments [12][13][14]. The microbial degradation of textile dyes has been reported using different microorganisms including bacteria, yeasts and filamentous fungi [3,15,16].…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Synthetic Dyes: A Mycoremediation Approach for Degradation/Decolourization of Textile Dyes and Effluents

Singh

2017

JABB

View full text Add to dashboard Cite

Present review highlights the role of fungi in biodegradation/decolourization of textile dyes and effluents. Though, fungi and bacteria both are the principal decomposer of xenobiotics in the environment but fungi are superior to bacteria in dyes degradation/decolourization due to their superiority in the production of dyes degrading enzymes and as absorbent. The present study focused on the achievements and advancement on the fungal degradation/decolourization of textiles dyes and effluents by the application of potent fungal strains. The biodegradation through fungi or myco-remediation of textile dyes and effluents using potential fungi is comparatively cheap and environmentally safe process, to decompose or mineralize the hardly or less degrading compounds of synthetic dyes. Fungi play an important role to degrade/decolourize the synthetic dyes through enzymes as well as by the absorption, adsorption and accumulation of colourants from the effluents.

show abstract

“…These dyes cause serious environmental and health concerns to aqueous ecosystems and humans (Sarnaik and Kanekar 1995), due to their toxicity (de Campos Ventura-Camargo and Marin-Morales 2013). Typically, dyeing baths contain a nominal percentage of dye between 1 and 15 % by weight of material, but 2 up to 50 % of the original dye is generally lost in the wastewaters, depending on the class of the dye used (Khan et al 2013;Ogugbue and Electronic supplementary material The online version of this article (doi:10.1007/s00253-015-6648-4) contains supplementary material, which is available to authorized users. Sawidis 2011; Khalid et al 2008;McMullan et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, bioremediation and more generally biotechnologies have gathered growing interest because of their cost-effective and eco-friendly profile (Khan et al 2013;Ali 2010;Solís et al 2012). Some algae (Daneshvar et al 2007;Khataee et al 2010), bacteria (Ayed et al 2010;Amoozegar et al 2011;Saratale et al 2011), fungi (Kaushik and Malik 2009;Novotný et al 2011;Verma et al 2012;Ali et al 2008;Jin et al 2007;Xian-Chun et al 2007;Fu and Viraraghavan 2001;Marimuthu et al 2013;Tegli et al 2014), and yeasts (Vitor and Corso 2008;Qu et al 2012) were proved to achieve acceptable and efficient dye removal.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of acid and basic dyes: understanding the metabolic degradation and cell-induced adsorption/precipitation by Escherichia coli

Cerboneschi

Corsi

Bianchini

et al. 2015

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

Escherichia coli strain DH5α was successfully employed in the decolorization of commercial anthraquinone and azo dyes, belonging to the general classes of acid or basic dyes. The bacteria showed an aptitude to survive at different pH values on any dye solution tested, and a rapid decolorization was obtained under aerobic conditions for the whole collection of dyes. A deep investigation about the mode of action of E. coli was carried out to demonstrate that dye decolorization mainly occurred via three different pathways, specifically bacterial induced precipitation, cell wall adsorption, and metabolism, whose weight was correlated with the chemical nature of the dye. In the case of basic azo dyes, an unexpected fast decolorization was observed after just 2-h postinoculation under aerobic conditions, suggesting that metabolism was the main mechanism involved in basic azo dye degradation, as unequivocally demonstrated by mass spectrometric analysis. The reductive cleavage of the azo group by E. coli on basic azo dyes was also further demonstrated by the inhibition of decolorization occurring when glucose was added to the dye solution. Moreover, no residual toxicity was found in the E. coli-treated basic azo dye solutions by performing Daphnia magna acute toxicity assays. The results of the present study demonstrated that E. coli can be simply exploited for its natural metabolic pathways, without applying any recombinant technology. The high versatility and adaptability of this bacterium could encourage its involvement in industrial bioremediation of textile and leather dyeing wastewaters.

show abstract

Microbial decolorization and degradation of synthetic dyes: a review

Cited by 373 publications

References 144 publications

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

Biodegradation of Synthetic Dyes: A Mycoremediation Approach for Degradation/Decolourization of Textile Dyes and Effluents

Decolorization of acid and basic dyes: understanding the metabolic degradation and cell-induced adsorption/precipitation by Escherichia coli

Contact Info

Product

Resources

About