Azo Dye Mineralization by Phanerochaete Chysosporium in a Sequencing Bath Reactor

Wanderley, Carlos Ronald Pessoa; Andrade, Marcus Vinícius Freire; Pereira, Luciana; Marinho, Glória; Pessoa, Kelly Rodrigues

doi:10.1590/1678-4324-2018180195

Cited by 3 publications

(2 citation statements)

References 17 publications

(24 reference statements)

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“…Enhanced techniques are evidently the pre-condition for accelerated elimination of azo dyes, because any residual contaminants should be removed completely. Fungi have been investigated, especially those secreting non-specific oxidases which eventually lead to the azo dyes mineralization into CO2 (Wanderley et al 2018). Fungal degradation (Mycoremediation) also leads to complete decoloration and detoxification, which prevents sludge removal and secondary contamination issues.…”

Section: Introductionmentioning

confidence: 99%

Mycoremediation of Textile Effluent: A Toxicological Evaluation and its Possible Correlation with COD

Rajhans

Barik

Sen³

et al. 2021

Preprint

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Globally, textile industries are one of the major sectors releasing dye pollutants. This is the first report on the positive correlation between toxicity and COD of textile effluent along with the proposed pathway for enzymatic degradation of acid orange 10 using Geotrichum candidum within a very short stretch of time (18h). Removal efficiency of this mycoremedial approach after 18 h in terms of color, dye concentration as well as reduction of chemical oxygen demand (COD) and biological oxygen demand (BOD) in the treated effluent reached to 89%, 87%, 98.5% and 96.3% respectively. FT-IR analysis of the treated effluent confirmed biodegradation. The LC-MS analysis showed the degradation of acid orange 10, which was confirmed by the formation of two biodegradation products, 7-oxo-8-iminonapthalene-1,3-disulfonate and nitrosobenzene, which subsequently undergoes stepwise hydrogenation and dehydration to form aniline via phenyl hydroxyl amine as intermediate. The X-ray diffraction (XRD) studies showed that heavy metals content in the treated effluent has reduced along with decrease in % crystallinity, indicating biodegradation. The connection between toxicity and COD was also inveterated using Pearson’s correlation coefficient. Further the toxicological studies indicated the toxicity of raw textile effluent and relatively lower toxic nature of metabolites generated after biodegradation by G. candidum.

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Section: Introductionmentioning

confidence: 99%

Mycoremediation of Textile Effluent: A Toxicological Evaluation and its Possible Correlation with COD

Rajhans

Barik

Sen³

et al. 2021

Preprint

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“…Fungi, particularly secreting non‐specific oxidases and leading to mineralization of azo dyes into carbon dioxide, have been explored (Wanderley et al . 2018). Degradation by these fungi often leads to complete decolourization as well as detoxification evading the trouble of sludge removal and secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

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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White Rot Fungi as Tools for the Bioremediation of Xenobiotics: A Review

Torres-Farradá,

Thijs,

Rineau

et al. 2024

JoF

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Industrial development has enhanced the release into the environment of large quantities of chemical compounds with high toxicity and limited prospects of degradation. The pollution of soil and water with xenobiotic chemicals has become a major ecological issue; therefore, innovative treatment technologies need to be explored. Fungal bioremediation is a promising technology exploiting their metabolic potential to remove or lower the concentrations of xenobiotics. In particular, white rot fungi (WRF) are unique microorganisms that show high capacities to degrade a wide range of toxic xenobiotic compounds such as synthetic dyes, chlorophenols, polychlorinated biphenyls, organophosphate pesticides, explosives and polycyclic aromatic hydrocarbons (PAHs). In this review, we address the main classes of enzymes involved in the fungal degradation of organic pollutants, the main mechanisms used by fungi to degrade these chemicals and the suitability of fungal biomass or extracellular enzymes for bioremediation. We also exemplify the role of several fungi in degrading pollutants such as synthetic dyes, PAHs and emerging pollutants such as pharmaceuticals and perfluoroalkyl/polyfluoroalkyl substances (PFASs). Finally, we discuss the existing current limitations of using WRF for the bioremediation of polluted environments and future strategies to improve biodegradation processes.

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Azo Dye Mineralization by Phanerochaete Chysosporium in a Sequencing Bath Reactor

Cited by 3 publications

References 17 publications

Mycoremediation of Textile Effluent: A Toxicological Evaluation and its Possible Correlation with COD

Mycoremediation of Textile Effluent: A Toxicological Evaluation and its Possible Correlation with COD

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

White Rot Fungi as Tools for the Bioremediation of Xenobiotics: A Review

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