Biodegradation of pyridine raffinate by microbial laccase isolated from Pseudomonas monteilii &amp; Gamma proteobacterium present in woody soil

Rajput, Manish Singh; Dwivedi, Vinay; Awasthi, Shailendra K.

doi:10.1016/j.bcab.2020.101650

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…Continuing in the same area of xenobiotic degradation, in paper [134], the analysis was focused on pyridine raffinate (organic pollutant) degradation using bacterial laccase. To optimize laccase production, the optimization of carbon and nitrogen sources, pH, time, and temperature were considered.…”

Section: Laccase and Xenobioticsmentioning

confidence: 99%

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

et al. 2022

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The accumulation of waste and toxic compounds has become increasingly harmful to the environment and human health. In this context, the use of laccases has become a focus of interest, due to the properties of these versatile enzymes: low substrate specificity, and water formation as a non-toxic end product. Thus, we begin our study with a general overview of the importance of laccase for the environment and industry, starting with the sources of laccases (plant, bacterial and fungal laccases), the structure and mechanism of laccases, microbial biosynthesis, and the immobilization of laccases. Then, we continue with an overview of agro-waste treatment by laccases wherein we observe the importance of laccases for the biodisponibilization of substrates and the biodegradation of agro-industrial byproducts; we then show some aspects regarding the degradation of xenobiotic compounds, dyes, and pharmaceutical products. The objective of this research is to emphasize and fully investigate the effects of laccase action on the decomposition of lignocellulosic materials and on the removal of harmful compounds from soil and water, in order to provide a sustainable solution to reducing environmental pollution.

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Section: Laccase and Xenobioticsmentioning

confidence: 99%

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

et al. 2022

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“…Organic pollutants include several groups like pesticides, hydrocarbons, polycyclic aromatic hydrocarbon (PAHs), polychlorinated biphenyl (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) polychlorinated dibenzofurans (PCDF), polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs), surfactants, or pharmaceuticals. This group separately or together pollutes the soil for examples the groups of PCBs include 209 congeners [17,18].…”

Section: Organic Pollutantsmentioning

confidence: 99%

Nanoparticles: Novel Approach to Mitigate Environmental Pollutants

Singh¹,

Singh²,

Gautam³

et al. 2022

Biodegradation Technology of Organic and Inorganic Pollutants

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Pollution is one of the biggest challenges of current times. For control of environmental pollutants, degradation of these contaminants is need of times. Degradation of pollutants can be achieved by various physical and chemical or by physicochemical approaches. Since these methods are in efficient, hence development of biological methods began. Bioremediation is the approach of using bacteria, fungi, plants, algae, etc. to degrade wide range of environmental pollutants. Nano-bioremediation is one of such method which has received lot of attention in past few years. Nano-sized particles have large surface area relative to their volumes and thus have enhanced chemical and biological reactivity. Nano-bioremediation aims at reducing the contaminant concentrations to low risk-based levels and alleviating environmental impacts simultaneously. It brings the benefits to both nanotechnology and bioremediation together to achieve remediation which is more efficient, less time taking and eco-friendly.

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“…The United States Environmental Protection Agency has classi ed pyridine as an organic pollutant of primary consideration. The most recent NBC report states that the worldwide pyridine market is estimated to grow to USD 747.89 million by 2023 [9]. Current technologies enable pyridine treatment via coagulation, adsorption, Fenton oxidation, photocatalytic oxidation, chemical oxidation, and direct incineration techniques [10].…”

Section: Introductionmentioning

confidence: 99%

Microbial biodegradation of pyridine by marine mangrove Bacillus aryabhattai strain NM1-A2 via a novel nitrogen metabolism pathway

Kashif,

Mo,

Xiong

et al. 2023

Preprint

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Background: Diverse microbes, such as bacteria, are of immense worth to mangrove ecosystems owing to their adaptability to salinity and variable environmental conditions. Bacteria have a crucial role in the nutrient cycling of carbon and nitrogen as well as the biodegradation of hazardous industrial waste materials. Methods: This work established the genetic-based molecular degradation of organic compounds in the mangrove ecosystem, which ultimately makes the availability of nutrients. As well as the effects of various abiotic factors on pyridine degradation to discover the pyridine degradation and the removal of ammonia nitrogen and the proposed nitrogen metabolism pathway. Results: The novel bacterial strain NM1-A2 was isolated from mangrove sediments and, after 16S rRNA gene sequence analysis identified as Bacillus aryabhattai. NM1-A2 completely degraded pyridine within a 100 h incubation period at a temperature of 35 °C, an initial pH of 7.0, glucose and a pyridine concentration of 500 mg/L. The pseudo-first-order kinetics model described the pyridine biodegradation profile of NM1-A2 well. Interestingly, the strain achieved almost 100% pyridine degradation with a total organic carbon removal rate of 87.9% (from 377.52 ± 45.65 mg/L) within 96 h. Within 96 h, the pyridine ring in the total nitrogen fraction at the maximum concentration (55.31 ± 0.17 mg/L) was converted into NH4+-N at a conversion rate of 51.3% ± 2.39%. Notably, NM1-A2 displayed remarkable stability considering that its pyridine biodegradation activity declined by only 4% after three consecutive cycles (48 h each). Moreover, NM1-A2 possessed nrt-ABCD nitrate transport family and gltABCD operons that participate in the activities of glutamine and glutamate synthetase in NH4+ conversion in the nitrogen cycle. Conclusion: This research offers a potential treatment strategy for pyridine in the mangrove ecosystem.

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Biodegradation of pyridine raffinate by microbial laccase isolated from Pseudomonas monteilii & Gamma proteobacterium present in woody soil

Cited by 8 publications

References 29 publications

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

Nanoparticles: Novel Approach to Mitigate Environmental Pollutants

Microbial biodegradation of pyridine by marine mangrove Bacillus aryabhattai strain NM1-A2 via a novel nitrogen metabolism pathway

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