Decolorization, degradation and detoxification of carcinogenic sulfonated azo dye methyl orange by newly developed biofilm consortia

Saudi Journal of Biological Sciences, Journal Year: 2020, Volume and Issue: 28(1), P. 793 - 804

Published: Nov. 11, 2020

Metabolites of azo dyes are often carcinogenic, teratogenic, mutagenic and recalcitrant in nature. In this study, four biofilm consortia such as C1 (Vitreoscilla sp. ENSG301, Acinetobacter lwoffii ENSG302, Klebsiella pneumoniae ENSG303 Pseudomonas fluorescens ENSG304), C2 (Escherichia coli ENSD101, Enterobacter asburiae ENSD102 E. ludwigii ENSH201), C3 (E. ENSD102, Vitreoscilla ENSG301 Bacillus thuringiensis ENSW401), C4 ENSH201 B. ENSW401) were applied to degrade detoxify methyl orange (MO), a sulfonated mono dye, used textile dyeing industry worldwide. The C1, C2, showed 97.30, 98.75, 99.51 99.29% decolorization, respectively yeast extract peptone (YEP) broth containing 200 mg L-1 MO within 60 h incubation static condition. optimum pH temperature for decolorization was 7.0 28 °C, respectively. Some divalent metal ions including Mg2+, Ca2+, Zn2+ Mn2+ could stimulate decolorization. UV-Vis spectral analysis that the absorption peak at 465 nm originated from (N[bond, double bond]N) bond completely disappeared incubation. Fourier transform infrared spectroscopy (FTIR) results also revealed several major peaks 1602.6 cm-1 or partly vanished, deformed shifted. Activities azoreductase, NADH-DCIP reductase laccase significantly increased bacterial cells comparison control (0 h). chemical oxygen demand incredibly reduced by 85.37 91.44% these consortia. Accordingly, plant (wheat seed germination) microbial (growth probiotic bacteria cedrina ESR12 cereus ESD3 on biodegraded products) toxicity studies products non-toxic. Thus, all can be utilized bioremediation wastewater safe disposal into environment. To our knowledge, is first report degradation detoxification

Language: Английский

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Phytoremediation of methylene blue using duckweed (Lemna minor)

Heliyon, Journal Year: 2019, Volume and Issue: 5(8), P. e02206 - e02206

Published: Aug. 1, 2019

Azo dyes are the largest class of synthetic and utilized in several industries. Effluents containing released to environment pose harm humans who might be exposed these contaminants. This study aims investigate removal methylene blue (MB) dye using duckweed (Lemna minor). L. minor (2 g) was into 50 mg/L MB for 24 h. The absorbance values were measured at 0, 0.5, 1, 2, 3, 4, 5, 6, h with a maximum wavelength 665 nm. percentage relative growth rate during exposure observed. 80.56 ± 0.44% 0.006/h. has potential as phytoremediation agent remove from wastewater.

Language: Английский

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Synthetic dyes biodegradation by fungal ligninolytic enzymes: Process optimization, metabolites evaluation and toxicity assessment

Journal of Hazardous Materials, Journal Year: 2020, Volume and Issue: 400, P. 123254 - 123254

Published: June 20, 2020

Language: Английский

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Laccases as versatile enzymes: from industrial uses to novel applications

Journal of Chemical Technology & Biotechnology, Journal Year: 2019, Volume and Issue: 95(3), P. 481 - 494

Published: Oct. 6, 2019

Abstract The application of enzymes offers an enormous potential in the improvement existing industrial procedures and establishment new processes for obtaining high‐added value products. Enzymes provide cleaner more efficient contribute to sustainability concept. In this sense, laccases are very versatile biocatalysts currently used food, textile pulp paper sectors among others. During last years, scientific efforts have been diverted exploitation such interesting novel fields like lignocellulosic biorefineries, biosensors or enzymatic biofuel cells. This review provides a general vision use laccase describing their main characteristics mode action. Furthermore, current uses summarized most revealed. increasing interest on is also demonstrated by research enzyme engineering as it detailed review. © 2019 Society Chemical Industry

Language: Английский

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Transition metal-based metal–organic frameworks for environmental applications: a review

Environmental Chemistry Letters, Journal Year: 2021, Volume and Issue: 19(2), P. 1295 - 1334

Published: Jan. 27, 2021

Language: Английский

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