Use of immobilized bacteria for environmental bioremediation: A review

Mehrotra, Tithi; Dev, Subhabrata; Banerjee, Aditi; Chatterjee, Abhijit; Singh, Rachana; Aggarwal, Srijan

doi:10.1016/j.jece.2021.105920

Cited by 146 publications

(57 citation statements)

References 184 publications

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“…or synthetic (polyacrylamide, polyvinyl alcohol, etc.) carrier protects them from predatory and suboptimal environmental conditions (Zawierucha and Malina, 2011;Nwankwegu and Onwosi, 2017;Partovinia and Rasekh, 2018;Mehrotra et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Free and Immobilized Microbial Culture–Mediated Crude Oil Degradation and Microbial Diversity Changes Through Taxonomic and Functional Markers in a Sandy Loam Soil

Khandelwal

Sugavanam

Ramakrishnan

et al. 2022

Front. Environ. Sci.

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Crude oil contamination of soil and water resources is a widespread issue. The present study evaluated the degradation of aliphatic hydrocarbons (C11–C36) in crude oil by 17 bacteria isolated from a crude oil–contaminated soil. The results suggested that Pseudomonas sp. and Bacillus amyloliquefaciens were the best hydrocarbon-degrading bacteria in the presence of surfactant Tween-80 (0.1% w/v). Based on the present investigation and a previous study, Pseudomonas sp. + B. amyloliquefaciens and fungus Aspergillus sydowii were identified as best oil degraders and were immobilized in alginate–bentonite beads, guargum–nanobenonite water dispersible granules (WDGs), and carboxy methyl cellulose (CMC)–bentonite composite. Sandy loam soil was fortified with 1, 2, and 5% crude oil, and total petroleum hydrocarbon (TPH) degradation efficiency of free cultures and bio-formulations was evaluated in sandy loam soils. Compared to a half-life (t1/2) of 69.7 days in the control soil (1% oil), free cultures of Pseudomonas sp. + B. amyloliquefaciens and A. sydowii degraded TPH with t1/2 of 10.8 and 19.4 days, respectively. Increasing the oil content slowed down degradation, and the t1/2 in the control and soils inoculated with Pseudomonas sp. + B. amyloliquefaciens and A. sydowii was 72.9, 14.7, and 22.2 days (2%) and 87.0, 23.4, and 30.8 days (5%), respectively. Supplementing soil with ammonium sulfate (1%) enhanced TPH degradation by Pseudomonas sp. + B. amyloliquefaciens (t1/2–10 days) and A. sydowii (t1/2–12.7 days). All three bio-formulations were effective in degrading TPH (1%), and the t1/2 was 10.7–11.9 days (Pseudomonas sp. + B. amyloliquefaciens and 14–20.2 days (A. sydowii) and were at par with free cultures. Microbial diversity analysis based on taxonomic markers and functional markers suggested that the bioaugmentation process helped keep soil in the active stage and restored the original microbial population to some extent. The present study concluded that bio-formulations of crude oil–degrading microbes can be exploited for its degradation in the contaminated environment.

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Section: Introductionmentioning

confidence: 99%

Free and Immobilized Microbial Culture–Mediated Crude Oil Degradation and Microbial Diversity Changes Through Taxonomic and Functional Markers in a Sandy Loam Soil

Khandelwal

Sugavanam

Ramakrishnan

et al. 2022

Front. Environ. Sci.

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“…The immobilization of bacteria in a sol-gel matrix leads to stabilization of the catalytic activity and makes it possible to repeatedly or continuously use the biocatalyst. The integration of microorganisms into sol-gel structures removes many limitations that arise during the working with free cell systems [ 21 , 40 , 41 , 42 ].…”

Section: The Classification Of Hybrid Materials According To the Type...mentioning

confidence: 99%

Preparation of Hybrid Sol-Gel Materials Based on Living Cells of Microorganisms and Their Application in Nanotechnology

et al. 2022

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Microorganism-cell-based biohybrid materials have attracted considerable attention over the last several decades. They are applied in a broad spectrum of areas, such as nanotechnologies, environmental biotechnology, biomedicine, synthetic chemistry, and bioelectronics. Sol-gel technology allows us to obtain a wide range of high-purity materials from nanopowders to thin-film coatings with high efficiency and low cost, which makes it one of the preferred techniques for creating organic-inorganic matrices for biocomponent immobilization. This review focuses on the synthesis and application of hybrid sol-gel materials obtained by encapsulation of microorganism cells in an inorganic matrix based on silicon, aluminum, and transition metals. The type of immobilized cells, precursors used, types of nanomaterials obtained, and their practical applications were analyzed in detail. In addition, techniques for increasing the microorganism effective time of functioning and the possibility of using sol-gel hybrid materials in catalysis are discussed.

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“…Therefore, crosslinking has been more victorious in the immobilization of non-viable microbial cells ( Martins et al, 2013 ). Cross-linking has a wide range of acceptance for microbial immobilization and presents benefits like speed and simplicity compared to covalent bonding, and is challenging to control carefully ( Mehrotra et al, 2021 ). By using covalent bonding and adsorption, Chen et al (2019) had immobilized laccase enzyme with the support of wheat straw and peanut shells to remove nitenpyram in the agroecosystem.…”

Section: Microbial Technologies For the Enhanced Neonicotinoid Biodegradationmentioning

confidence: 99%

Microbial Technologies Employed for Biodegradation of Neonicotinoids in the Agroecosystem

et al. 2021

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Neonicotinoids are synthetic pesticides widely used for the control of various pests in agriculture throughout the world. They mainly attack the nicotinic acetylcholine receptors, generate nervous stimulation, receptor clot, paralysis and finally cause death. They are low volatile, highly soluble and have a long half-life in soil and water. Due to their extensive use, the environmental residues have immensely increased in the last two decades and caused many hazardous effects on non-target organisms, including humans. Hence, for the protection of the environment and diversity of living organism’s the degradation of neonicotinoids has received widespread attention. Compared to the other methods, biological methods are considered cost-effective, eco-friendly and most efficient. In particular, the use of microbial species makes the degradation of xenobiotics more accessible fast and active due to their smaller size. Since this degradation also converts xenobiotics into less toxic substances, the various metabolic pathways for the microbial degradation of neonicotinoids have been systematically discussed. Additionally, different enzymes, genes, plasmids and proteins are also investigated here. At last, this review highlights the implementation of innovative tools, databases, multi-omics strategies and immobilization techniques of microbial cells to detect and degrade neonicotinoids in the environment.

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Use of immobilized bacteria for environmental bioremediation: A review

Cited by 146 publications

References 184 publications

Free and Immobilized Microbial Culture–Mediated Crude Oil Degradation and Microbial Diversity Changes Through Taxonomic and Functional Markers in a Sandy Loam Soil

Free and Immobilized Microbial Culture–Mediated Crude Oil Degradation and Microbial Diversity Changes Through Taxonomic and Functional Markers in a Sandy Loam Soil

Preparation of Hybrid Sol-Gel Materials Based on Living Cells of Microorganisms and Their Application in Nanotechnology

Microbial Technologies Employed for Biodegradation of Neonicotinoids in the Agroecosystem

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