Microbial decolourisation and degradation of textile dyes

McMullan, Geoffrey; Meehan, C; Conneely, A.; Kirby, Niamh; Robinson, Tim; Nigam, Poonam Singh Nee; Banat, Ibrahim M.; Marchant, Roger; Smyth, W.F.

doi:10.1007/s002530000587

Cited by 768 publications

(325 citation statements)

References 24 publications

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“…6). Diazonium form of stable mediate concludes action of oxidative enzyme present in A. calcoaceticus; it could not breaks an azo linkage, in contrast, reported earlier as initial step in the bacterial azo dye metabolism under anaerobic conditions involves the reductive cleavage of an azo linkage [21]. Bacterial degradation of azo dyes in aerobic/anaerobic conditions could be either at intracellular or extracellular level [22].…”

Section: Analysis Of Dye Degradation Productsmentioning

confidence: 86%

Decolorization of Textile Dyes and Degradation of Mono-Azo Dye Amaranth by Acinetobacter calcoaceticus NCIM 2890

et al. 2011

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Acinetobacter calcoaceticus NCIM 2890 (A. caloaceticus) was found to decolorize 20 different textile dyes of various classes. Decolorization of an azo dye amaranth was observed effectively (91%) at static anoxic condition, whereas agitated culture grew well but showed less decolorization (68%) within 48 h of incubation. Induction of intracellular and extracellular lignin peroxidase, intracellular laccase, dichlorophenol indophenol (DCIP) reductase and riboflavin reductase represented their involvement in the biodegradation of amaranth. The products obtained after degradation of Amaranth were characterized as naphthalene sulfamide, hydroxyl naphthalene diazonium and naphthalene diazonium. The germination and growth of Sorghum vulgare and Phaseolus mungo seeds, and the growth of E. coli and Bacillus substilis were not inhibited by the metabolic products of the dye.

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Section: Analysis Of Dye Degradation Productsmentioning

confidence: 86%

Decolorization of Textile Dyes and Degradation of Mono-Azo Dye Amaranth by Acinetobacter calcoaceticus NCIM 2890

et al. 2011

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“…By means of enzymatic catalyzed oxidative reactions, laccase can detoxify phenolic contaminants, such as aromatic amines, to harmless/less harmful products [10]. The suitability of laccases for such processes has been known for some time [11] and successful results achieved have been well documented by our group [12] and others [13,14]. These being of primary importance to the textile industry, dyes and dyestuffs are commonly used in the pharmaceutical, food, cosmetic and leather industries.…”

Section: Introductionmentioning

confidence: 87%

An acid-stable laccase from Sclerotium rolfsii with potential for wool dye decolourization

Ryan

Schnitzhofer

Tzanov

et al. 2003

Enzyme and Microbial Technology

108

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The plant pathogen basidiomycete S. rolfsii secretes two laccases (SRL1 and SRL2) with molecular weights of 55 and 86 kDa, respectively. Laccase production was shown to be inducible by the addition of 2,5-xylidine to the cultural media. After treatment with a combination of chitinase and ␤-1,3-glucanase, two different laccases were isolated from the sclerotia depending on the stage of sclerotia development.The more prominent laccase, SRL1, was purified and found to decolourize the industrially important wool azo dye Diamond Black PV 200 without the addition of redox mediators. The enzyme (pI 5.2) was active in the acidic pH range, showing an optimal activity at pH 2.4, with ABTS as substrate. The optimum temperature for activity was determined to be 62 • C. Enzyme stability studies revealed that SRL1 was notably stable at 18 • C and pH 4.5, retaining almost full activity after a week. Oxidation of tyrosine was not detectable under the reaction conditions but the enzyme did oxidize a variety of the usual laccase substrates. SRL1 was strongly inhibited by sodium azide and fluoride. Dye solutions decolourized with the immobilized laccase were successfully used for redyeing.

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“…Remnant dyes in the effluents are generally toxic and resistant to biodegradation, which may affect the ecological symbiotic balance of the receiving water stream [1][2][3]. As such, various methods have been developed for removing dye pollutants, and among them adsorption has drawn particular interests, as it possesses the merits of high-efficiency and simplicity of operation.…”

Section: Introductionmentioning

confidence: 99%