Decolorization of diazo dye trypan blue by electrochemical oxidation: Kinetics with a model based on the Fermi’s equation

Ghime, Damodhar; Ghosh, Prabir

doi:10.1016/j.jece.2018.11.037

Cited by 11 publications

(3 citation statements)

References 35 publications

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“…2020). Previous studies also reveal the decolourization of trypan blue using electrochemical oxidation (Ghime and Ghosh 2020). However, no study on decolourization of Eriochrome Black T and trypan blue has been reported using microbes.…”

Section: Discussionmentioning

confidence: 85%

Elucidation of fungal dye‐decolourizing peroxidase (DyP) and ligninolytic enzyme activities in decolourization and mineralization of azo dyes

Rajhans

Sen²,

Barik

et al. 2020

J Appl Microbiol

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Aim The aim of the study is to investigate the efficiency of Geotrichum candidum in the decolourization and mineralization of synthetic azo dyes. Methods and Results It includes screening of enzymes from G. candidum and its optimization, followed by decolourization and mineralization studies. Decolourization was observed to be maximum in methyl orange (94·6%) followed by Congo red (85%), trypan blue (70·4%) and Eriochrome Black T (55·6%) in 48 h, suggesting the plausible degradation of the azo dyes by G. candidum. The enzyme activity study showed that DyP‐type peroxidase has highest activity of 900 mU ml−1 compared to that of laccase (405 mU ml−1) and lignin peroxidase (LiP) (324 mU ml−1) at optimized pH (6) and temperature (35°C). Moreover, the rate of decolourization was found to be directly proportional to the production of laccase and LiP, unlike DyP‐type peroxidase. Furthermore, mineralization study demonstrated reduction in aromatic amines, showing 20% mineralization of methyl orange. Conclusion Geotrichum candidum with its enzyme system is able to efficiently decolourize and mineralize the experimental azo dyes. Significance and Impact of the Study The efficient decolourization and mineralization of azo dyes makes G. candidum a promising alternative in the treatment of textile effluent contaminated with azo dyes.

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Section: Discussionmentioning

confidence: 85%

Elucidation of fungal dye‐decolourizing peroxidase (DyP) and ligninolytic enzyme activities in decolourization and mineralization of azo dyes

Rajhans

Sen²,

Barik

et al. 2020

J Appl Microbiol

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“…In an attempt to reduce its use, some substitutes were proposed (Santana et al, 2020a;Silva et al, 2015;Vierheilig et al, 2005), but when indispensable, it is necessary to think about alternatives for the treatment of effluents to reduce the impacts on the environment. One option is biodegradation performed by basidiomycete fungi and, even if other trypan blue discoloration techniques have been proposed (Nadaroglu et al, 2017;Ghime and Ghosh, 2020;Aljadaani et al, 2021), biological discoloration by fungi has many advantages in view of the enormous enzymatic potential proven useful in the treatment of synthetic azo dyes (Nozaki et al, 2008;Ali et al, 2010;Gregorio et al, 2010).…”

Section: Trypan Blue Dye Discoloration In Solid Culture Mediummentioning

confidence: 99%

Biodegradation and reduction of toxicity of Azo Trypan Blue dye by Amazonian strains of gasteroid fungi (Basidiomycota)

Santana,

Couceiro,

Lara

2023

Braz. J. Biol.

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Amazonian strains of Cyathus spp. and Geastrum spp. were studied for the ability to discolor the trypan blue azo dye and reduce its toxicity. Discoloration of trypan blue dye (0.05%) was evaluated in solid and aqueous medium over different periods. The reduction of dye toxicity after treatment was assessed by seed germination and the development of lettuce seedlings (Lactuca sativa L.) and toxicity test in Artemia salina (L.) larvae. All evaluated strains showed the potential to reduce the color intensity of trypan blue dye. Cyathus strains reached 96% discoloration, and C. albinus and C. limbatus also reduced dye toxicity. Geastrum strains showed a high efficiency degree in color reduction, reaching 98% discoloration, however, the by-products generated during the process presented toxicity and require further investigation. For the first time, Amazonian strains of gasteroid fungi degrading trypan blue are reported, some even reducing its toxicity. Thus, making them promising sources of enzymes of interest to bioremediation scenarios involving synthetic dyes.

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“…The percentage of dye removal was calculated as follows (Eq. 1) [24]: where C dye,t and C dye,0 are the concentrations of dye at reaction time t and 0, respectively.…”

Section: Biosorption Experimental Setupmentioning

confidence: 99%

Textile Dye Removal by Acacia dealbata Link. Pollen Adsorption Combined with UV-A/NTA/Fenton Process

et al. 2022

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The decolourization of an aqueous solution of the textile dye Acid Red 88 (AR88) and the control of the invasive plant species Acacia dealbata Link. (ADL) were addressed in this work. The aims of the study were (1) characterization of the ADL pollen, (2) application of the pollen powder in adsorption processes, (3) selection of the best operational conditions for nitriloacetic acid (NTA)-UV-A-Fenton process and (4) assess the efficiency of the combined treatment adsorption and NTA-UV-A-Fenton in AR88 decolourization. In a first step, ADL pollen was used as a AR88 bioadsorbent. Fourier-transform infrared spectroscopy (FTIR) analysis were performed and revealed the presence of proteins, fatty acids, carbohydrates and lignin in the pollen. Afterwards, trough scanning electron microscopy (SEM), it was possible to verify that ADL pollen has several empty spaces that can be used for dye adsorption. Biosorption results showed higher adsorption of AR88 with application of pH 3.0 and [pollen] = 3.0 g/L with 18.8 mg/g of dye adsorbed. The best fitting was observed with Langmuir, SIPS and Jovanovic isotherms (0.993, 0.996 and 0.994, respectively). To complement the biosorption, a UV-A-Fenton process was applied, and results showed a higher AR88 removal with (NTA) addition. Higher irradiance power favored the oxidation process with high Ф photodegradation value and low Electric Energy per Order ($$E_{\text{EO}}$$ E EO ) and Specific Applied Energy ($$E_{\text{SAE}}$$ E SAE ). The combination of biosorption with NTA-UV-A-Fenton was the most efficient system with an AR88 decolourization of 98.5% and a total organic carbon (TOC) removal of 83.5%. Graphical Abstract

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Decolorization of diazo dye trypan blue by electrochemical oxidation: Kinetics with a model based on the Fermi’s equation

Cited by 11 publications

References 35 publications

Elucidation of fungal dye‐decolourizing peroxidase (DyP) and ligninolytic enzyme activities in decolourization and mineralization of azo dyes

Elucidation of fungal dye‐decolourizing peroxidase (DyP) and ligninolytic enzyme activities in decolourization and mineralization of azo dyes

Biodegradation and reduction of toxicity of Azo Trypan Blue dye by Amazonian strains of gasteroid fungi (Basidiomycota)

Textile Dye Removal by Acacia dealbata Link. Pollen Adsorption Combined with UV-A/NTA/Fenton Process

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