A review on catalytic-enzyme degradation of toxic environmental pollutants: Microbial enzymes

Saravanan, A.; Kumar, P. Senthil; Vo, Dai‐Viet N.; Jeevanantham, S.; Karishma, S.; Yaashikaa, P.R.

doi:10.1016/j.jhazmat.2021.126451

Cited by 169 publications

(55 citation statements)

References 118 publications

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“…The inoculation of specific bacterial consortia with multiple catabolic genes is a reasonable and feasible strategy for accelerating the efficiency of heavy oil removal from polluted environments [40][41][42][43]. However, the presence of PAHs with high toxicity and large molecular weight limits the start-up and biodegradation of the added bacterial consortia [13,14]. Therefore, we presume that the rapid degradation of PAHs (the main toxic components of heavy oil) into non-toxic or low toxic substances can quickly start heavy oil biodegradation.…”

Section: Discussionmentioning

confidence: 99%

“…Laccase, oxidases, reductases, depolymerases, peroxidases, dioxygenases, and dehydrogenases are utilized for the degradation of different toxic environmental pollutants (PAHs, dyes, heavy metals, plastics, pesticides, etc.) [12][13][14]. The advantages of enzymatic degradation of toxic environmental pollutants include highly flexible operational conditions; ease of control; a rapid, cost-effective, and highly specific process; no need of nutrient supply; reduced mass transfer limitation; resistance to protozoa predation and toxic pollutants, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The advantages of enzymatic degradation of toxic environmental pollutants include highly flexible operational conditions; ease of control; a rapid, cost-effective, and highly specific process; no need of nutrient supply; reduced mass transfer limitation; resistance to protozoa predation and toxic pollutants, etc. [13]. Therefore, it can be applied to both in situ bioremediation and ex situ bioremediation.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Adding Laccase to Bacterial Consortia Degrading Heavy Oil

Dai

Wei

et al. 2021

Processes

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High-efficiency bioremediation technology for heavy oil pollution has been a popular research topic in recent years. Laccase is very promising for the remediation of heavy oil pollution because it can not only convert bio-refractory hydrocarbons into less toxic or completely harmless compounds, but also accelerate the biodegradation efficiency of heavy oil. However, there are few reports on the use of laccase to enhance the biodegradation of heavy oil. In this study, we investigated the effect of laccase on the bacterial consortia degradation of heavy oil. The degradation efficiencies of bacterial consortia and the laccase-bacterial consortia were 60.6 ± 0.1% and 68.2 ± 0.6%, respectively, and the corresponding heavy oil degradation rate constants were 0.112 day−1 and 0.198 day−1, respectively. The addition of laccase increased the heavy oil biodegradation efficiency (p < 0.05) and biodegradation rate of the bacterial consortia. Moreover, gas chromatography–mass spectrometry analysis showed that the biodegradation efficiencies of the laccase-bacterial consortia for saturated hydrocarbons and aromatic hydrocarbons were 82.5 ± 0.7% and 76.2 ± 0.9%, respectively, which were 16.0 ± 0.3% and 13.0 ± 1.8% higher than those of the bacterial consortia, respectively. In addition, the degradation rate constants of the laccase-bacterial consortia for saturated hydrocarbons and aromatic hydrocarbons were 0.267 day−1 and 0.226 day−1, respectively, which were 1.07 and 1.15 times higher than those of the bacterial consortia, respectively. The degradation of C15 to C35 n-alkanes and 2 to 5-ring polycyclic aromatic hydrocarbons by laccase-bacterial consortia was higher than individual bacterial consortia. It is further seen that the addition of laccase significantly improved the biodegradation of long-chain n-alkanes of C22–C35 (p < 0.05). Overall, this study shows that the combination of laccase and bacterial consortia is an effective remediation technology for heavy oil pollution. Adding laccase can significantly improve the heavy oil biodegradation efficiency and biodegradation rate of the bacterial consortia.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Adding Laccase to Bacterial Consortia Degrading Heavy Oil

Dai

Wei

et al. 2021

Processes

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“…Toxic chemicals, including sodium sulphide, salt, lime, and solvents, are released from these industries and can pollute the environment [210,258]. Chemical industries are the first target to eliminate environmental pollution, and pre-tanning procedures produce a higher amount of pollution than post-tanning procedures [259].…”

Section: Current Challenges and Future Perspectivementioning

confidence: 99%

Fungal Proteases as Emerging Biocatalysts to Meet the Current Challenges and Recent Developments in Biomedical Therapies: An Updated Review

Naeem

Manzoor²,

Abid

et al. 2022

JoF

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With the increasing world population, demand for industrialization has also increased to fulfill humans’ living standards. Fungi are considered a source of essential constituents to produce the biocatalytic enzymes, including amylases, proteases, lipases, and cellulases that contain broad-spectrum industrial and emerging applications. The present review discussed the origin, nature, mechanism of action, emerging aspects of genetic engineering for designing novel proteases, genome editing of fungal strains through CRISPR technology, present challenges and future recommendations of fungal proteases. The emerging evidence revealed that fungal proteases show a protective role to many environmental exposures and discovered that an imbalance of protease inhibitors and proteases in the epithelial barriers leads to the protection of chronic eosinophilic airway inflammation. Moreover, mitoproteases recently were found to execute intense proteolytic processes that are crucial for mitochondrial integrity and homeostasis function, including mitochondrial biogenesis, protein synthesis, and apoptosis. The emerging evidence revealed that CRISPR/Cas9 technology had been successfully developed in various filamentous fungi and higher fungi for editing of specific genes. In addition to medical importance, fungal proteases are extensively used in different industries such as foods to prepare butter, fruits, juices, and cheese, and to increase their shelf life. It is concluded that hydrolysis of proteins in industries is one of the most significant applications of fungal enzymes that led to massive usage of proteomics.

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“…This part of bioremediation technology is recommended for further research and will also increase the remediation processs efficiency as well because it does not require energy to transport the contaminants in the microbial body. Some researchers have reported successful bioremediation with the use of free enzymes [68][69][70]. Still, there is a need for research to identify field conditions suitability and site-specificity.…”

Section: Bioremediationmentioning

confidence: 99%

Pesticides Xenobiotics in Soil Ecosystem and Their Remediation Approaches

et al. 2022

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Globally, the rapid rise in the human population has increased the crop production, resulting in increased pesticide xenobiotics. Despite the fact that pesticide xenobiotics toxify the soil environment and ecosystem, synthetic pesticides have increased agricultural yields and reduced disease vectors. Pesticide use has increased, resulting in an increase in environmental pollution. Various methods of controlling and eliminating these contaminants have been proposed to address this issue. Pesticide impurity in the climate presents a genuine danger to individuals and other oceanic and earthly life. If not controlled, the pollution can prompt difficult issues for the climate. Some viable and cost-effective alternative approaches are needed to maintain this emission level at a low level. Phytoremediation and microbial remediation are effective methods for removing acaricide scrapings from the atmosphere using plants and organisms. This review gives an overview of different types of xenobiotics, how they get into the environment, and how the remediation of pesticides has progressed. It focuses on simple procedures that can be used in many countries. In addition, we have talked about the benefits and drawbacks of natural remediation methods.

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A review on catalytic-enzyme degradation of toxic environmental pollutants: Microbial enzymes

Cited by 169 publications

References 118 publications

Effects of Adding Laccase to Bacterial Consortia Degrading Heavy Oil

Effects of Adding Laccase to Bacterial Consortia Degrading Heavy Oil

Fungal Proteases as Emerging Biocatalysts to Meet the Current Challenges and Recent Developments in Biomedical Therapies: An Updated Review

Pesticides Xenobiotics in Soil Ecosystem and Their Remediation Approaches

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