Hazardous contaminants in the environment and their laccase-assisted degradation – A review

Bilal, Muhammad; Rasheed, Tahir; Nabeel, Faran; Iqbal, Hafiz M.N.; Zhao, Yuping

doi:10.1016/j.jenvman.2019.01.001

Cited by 221 publications

(87 citation statements)

References 118 publications

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“…Owing to their wide substrate range, laccases have been used in several areas, among them are biodegradation and bioremediation, degradation of antibiotics and other pharmaceutical products, lignin valorization by providing precursors for chemicals, fuels, and health‐care products, paper production, elimination of phenolic compounds from wine, construction of biosensors, as well as application in the pharmaceutical industry .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of laccase production by Ganoderma lucidum in submerged and solid‐state fermentation using different inducers

et al. 2019

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Laccases are multicopper oxidases with high potential for industrial applications. Several basidiomycete fungi are natural producers of this enzyme; however, the optimization of production and selection of inducers for increased productivity coupled with low costs is necessary. Lignocellulosic residues are important lignin sources and potential inducers for laccase production. Pinus taeda, a dominant source of wood-based products, has not been investigated for this purpose yet. The aim of this study was to evaluate the production of laccase by the basidiomycete fungus Ganoderma lucidum in the presence of different inducers in submerged and solid-state fermentation. The results of submerged fermentation in presence of 5 μM CuSO 4 , 2 mM ferulic acid, 0.1 g/L P. taeda sawdust, or 0.05 g/L Kraft lignin indicated that although all the tested inducers promoted increase in laccase activity in specific periods of time, the presence of 2 mM ferulic acid resulted in the highest value of laccase activity (49 U/L).Considering the submerged fermentation, experimental design following the Plackett-Burman method showed that the concentrations of ferulic acid and P. taeda sawdust had a significant influence on the laccase activity. The highest value of 785 U/L of laccase activity on submerged fermentation was obtained on the seventh day of cultivation. Finally, solid-state fermentation cultures in P. taeda using ferulic acid or CuSO 4 as inducers resulted in enzymatic activities of 144.62 and 149.89 U/g, respectively, confirming the potential of this approach for laccase production by G. lucidum. K E Y W O R D S

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Section: Introductionmentioning

confidence: 99%

Evaluation of laccase production by Ganoderma lucidum in submerged and solid‐state fermentation using different inducers

et al. 2019

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“…A few examples are dyes, antibiotics, pesticides, fertilizers, endocrine-disrupting chemicals, and many others. The literature regarding these experimental efforts has been recently reviewed by Bilal et al [121] and Barrios-Estrada et al [122]. In the recent literature, examples of the degradation of pesticides [123], synthetic dyes [124], bisphenol A [125], and pharmaceuticals [126] can be found.…”

Section: Bioremediation and Detoxificationmentioning

confidence: 99%

Applications of Microbial Laccases: Patent Review of the Past Decade (2009–2019)

et al. 2019

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There is a high number of well characterized, commercially available laccases with different redox potentials and low substrate specificity, which in turn makes them attractive for a vast array of biotechnological applications. Laccases operate as batteries, storing electrons from individual substrate oxidation reactions to reduce molecular oxygen, releasing water as the only by-product. Due to society’s increasing environmental awareness and the global intensification of bio-based economies, the biotechnological industry is also expanding. Enzymes such as laccases are seen as a better alternative for use in the wood, paper, textile, and food industries, and they are being applied as biocatalysts, biosensors, and biofuel cells. Almost 140 years from the first description of laccase, industrial implementations of these enzymes still remain scarce in comparison to their potential, which is mostly due to high production costs and the limited control of the enzymatic reaction side product(s). This review summarizes the laccase applications in the last decade, focusing on the published patents during this period.

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“…Indigenous microbial communities play a crucial role in the biodegradation of azo dyes in contaminated environments. Microbial enzymes such as azoreductase, laccase, and peroxidase are often involved in the initial reductive cleavage of the chromogenic azo bond (-N=N-) to produce lower molecular weight aromatic amines [10]. These potentially toxic intermediates are often characterized by thermally stable functional groups such as aniline, naphthalene, and benzidine [11].…”

Section: Introductionmentioning

confidence: 99%

High Throughput Sediment DNA Sequencing Reveals Azo Dye Degrading Bacteria Inhabit Nearshore Sediments

Zhuang

Sanganyado

et al. 2020

Microorganisms

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Estuaries and coastal environments are often regarded as a critical resource for the bioremediation of organic pollutants such as azo dyes due to their high abundance and diversity of extremophiles. Bioremediation through the activities of azoreductase, laccase, and other associated enzymes plays a critical role in the removal of azo dyes in built and natural environments. However, little is known about the biodegradation genes and azo dye degradation genes residing in sediments from coastal and estuarine environments. In this study, high-throughput sequencing (16S rRNA) of sediment DNA was used to explore the distribution of azo-dye degrading bacteria and their functional genes in estuaries and coastal environments. Unlike laccase genes, azoreductase (azoR), and naphthalene degrading genes were ubiquitous in the coastal and estuarine environments. The relative abundances of most functional genes were higher in the summer compared to winter at locations proximal to the mouths of the Hanjiang River and its distributaries. These results suggested inland river discharges influenced the occurrence and abundance of azo dye degrading genes in the nearshore environments. Furthermore, the azoR genes had a significant negative relationship with total organic carbon, Hg, and Cr (p < 0.05). This study provides critical insights into the biodegradation potential of indigenous microbial communities in nearshore environments and the influence of environmental factors on microbial structure, composition, and function which is essential for the development of technologies for bioremediation in azo dye contaminated sites.

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Hazardous contaminants in the environment and their laccase-assisted degradation – A review

Cited by 221 publications

References 118 publications

Evaluation of laccase production by Ganoderma lucidum in submerged and solid‐state fermentation using different inducers

Evaluation of laccase production by Ganoderma lucidum in submerged and solid‐state fermentation using different inducers

Applications of Microbial Laccases: Patent Review of the Past Decade (2009–2019)

High Throughput Sediment DNA Sequencing Reveals Azo Dye Degrading Bacteria Inhabit Nearshore Sediments

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