Decolorisation of synthetic dyes by crude laccase from <i>Rigidoporus lignosus</i> W1

Li, Li; Dai, Wenkui; Peng, Yu; Zhao, Jian; Qu, Yinbo

doi:10.1002/jctb.2053

Cited by 30 publications

(12 citation statements)

References 29 publications

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“…Biological processes have received increasing interest owing to their lower cost, higher efficiency and, in particular, environmental friendliness (Li et al 2009). Several microorganisms are capable of degrading synthetic dyes including bacteria, fungi and algae (Parshetti et al 2006;Dhaneshvar et al 2007;Bazanella et al 2013a).…”

Section: Introductionmentioning

confidence: 99%

Decolourization of Congo Red by Ganoderma lucidum Laccase: Evaluation of Degradation Products and Toxicity

Mota

Kato

Peralta

et al. 2015

Water Air Soil Pollut

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Several laccases from different sources have been used in dye decolourization processes. However, only in a reduced number of studies have efforts been done to identify the metabolites produced by the enzymatic treatment as well as to evaluate the toxicity of degradation products. Taking these gaps into account, the objective of this work was to use a laccase from Ganoderma lucidum in the decolourization of the synthetic dye Congo red (C.I. No. 22120, Direct Red 28), largely used in the textile industry. After 6 h of treatment at pH 4.0 and 40°C, the enzyme was able to decolourize 80 % of Congo red. Fourier transform infrared spectroscopy (FTIR), photoacoustic spectroscopy (PAS) and mass spectrometry allow concluding that laccase effectively changed the structure of Congo red, reducing the colour by modifying the chromophore groups and other parts of the molecule. Several degradation products with m/z + ranging from 298 to 745 were identified. It is proposed that the first degradation step could be an asymmetric cleavage of the azo bond present in the Congo red structure forming the intermediate with m/ z + 298. The results also suggest a reduction in the toxicity of Congo red after laccase treatment, as indicated by the lettuce seed germination model. In conclusion, G. lucidum laccase could be used in a novel azo dye bioremediation strategy.

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Section: Introductionmentioning

confidence: 99%

Decolourization of Congo Red by Ganoderma lucidum Laccase: Evaluation of Degradation Products and Toxicity

Mota

Kato

Peralta

et al. 2015

Water Air Soil Pollut

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“…In terms of treatments for textile wastewater, traditional methods such as physical, chemical, electrochemical methods are costly and could produce secondary pollutants [8][9][10]. In contrast, biodegradation attracts more interest from researchers owing to its low cost, excellent efficiency and environmental friendliness [11,12].…”

Section: Introductionmentioning

confidence: 99%

TiO2 Sol-Gel Coated PAN/O-MMT Multi-Functional Composite Nanofibrous Membrane Used as the Support for Laccase Immobilization: Synergistic Effect between the Membrane Support and Enzyme for Dye Degradation

Wang

et al. 2020

Polymers

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Removal of a triphenylmethane dye (crystal violet, CV) by a simultaneous enzymatic-photocatalytic-adsorption treatment was investigated in this work. A desirable synergistic effect on dye treatment was achieved by decorating laccase (Lac) onto the surface of TiO2 sol-gel coated polyacrylonitrile/organically modified montmorillonite (PAN/O-MMT) nanofibers prepared by electrospinning. The assembly of Lac on the surface of PAN/O-MMT/TiO2 nanofibers was confirmed by confocal laser scanning microscope (CLSM). In comparison with free Lac, the immobilized Lac showed better pH, temperature and operational stabilities, reaching highest relative activity at an optimum pH of 3 and optimum temperature of 50 °C. Therefore, the immobilized Lac displayed a higher degradation efficiency of CV at an initial dye concentration of 100 mg/L, an optimum pH of 4.5 and temperature at 60 °C. Under UV illumination, the CV removal efficiency was further improved by ~20%. These results demonstrated that the Lac-immobilized PAN/O-MMT/TiO2 composite nanofibers with a combined effect between the immobilized enzyme and the polymeric support have potential for industrial dye degradation.

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“…Synthetic dyes are extensively used in the textile industry because of their favorable characteristics of bright color, being easily water soluble, cheaper to produce and easier to apply with natural fi bers like wool, cotton, silk and synthetic fi bers like polyesters, acrylic, rayon 3 . The synthetic dyes have complex molecular structures, which make them more stable and diffi cult to biodegrade 4, 5 . The dyes are designed to be resistant to fading by chemicals and light 6 .…”

Section: Introductionmentioning

confidence: 99%

Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora

Kumar

Tamilarasan

2013

Polish Journal of Chemical Technology

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This paper presents the feasibility for the removal of methyl orange (MO) dye from aqueous solution using an activated carbon prepared from Prosopis julifl ora bark. Batch adsorption experiments were carried out as a function of pH, contact time, adsorbate concentration, adsorbent dosage and temperature. The commonly applicable isotherms namely Freundlich and Langmuir equations are used for the prediction of isotherm parameters. A comparison of linear least-square method and a trial-and-error non-linear method are examined in Freundlich and Langmuir (Four forms) isotherms. The nature of adsorption isotherm feasibility was evaluated with dimensionless separation factors (R L ). The dynamics of adsorption process was analyzed with Lagergren's Pseudo-fi rst order and Pseudo-second order kinetic equations. Thermodynamic parameters like the change in enthalpy (∆H o ), change in entropy (∆S o ) and change in Gibbs free energy (∆G o ) were evaluated and ΔG o shows a negative value whereas ΔH o shows the positive value indicating that the adsorption process was spontaneous and endothermic in nature. The functional group characterization of the adsorbent was done using Fourier transform infrared spectroscopy (FTIR). The thermal stability of activated carbon was analyzed using Thermo gravimetric analysis (TGA) and Differential thermal analysis (DTA).

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Decolorisation of synthetic dyes by crude laccase from Rigidoporus lignosus W1

Cited by 30 publications

References 29 publications

Decolourization of Congo Red by Ganoderma lucidum Laccase: Evaluation of Degradation Products and Toxicity

Decolourization of Congo Red by Ganoderma lucidum Laccase: Evaluation of Degradation Products and Toxicity

TiO2 Sol-Gel Coated PAN/O-MMT Multi-Functional Composite Nanofibrous Membrane Used as the Support for Laccase Immobilization: Synergistic Effect between the Membrane Support and Enzyme for Dye Degradation

Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora

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