Microbial-induced biosurfactant-mediated biocatalytic approach for the bioremediation of simulated marine oil spill

Muneeswari, R.; Swathi, K.; Sekaran, G.; Ramani, K.

doi:10.1007/s13762-020-03086-0

Cited by 13 publications

(3 citation statements)

References 44 publications

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“…[28] The desorption of the oil drop by the cell is a critical step in the bacteria growth cycle, where bacteria involve the drop with a biosurfactant film with hydrophilic characteristics in its outer layer. [16][17][18] As a continuation of the oil biodegradation process, bacteria adhere to the hydrophilic surface, degrading the aromatic hydrocarbons by producing specific enzymes. [53] In the present work, electron microscopic studies were done to elucidate the mechanisms of the uptake of water-insoluble hydrocarbons into bacterial cells.…”

Section: Daymentioning

confidence: 99%

“…In addition to oil‐degrading bacteria having specific enzymes for the degradation of complex substrate, it is necessary to consider the oil low water solubility and its hydrophobicity for oil bioremediation success. [ 16 ] Bacteria's enzymatic ability must be accompanied by the production of extracellular polysaccharides (EPS), which can act as an oil droplet emulsifier. This biosurfactant decreases the droplets’ size, facilitating bacteria access to the oil components.…”

Section: Introductionmentioning

confidence: 99%

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Oil spill bioremediation strategies in Brazilian tropical seawater—The role of polycyclic aromatic hydrocarbons degradation

de Souza,

Becker,

Vieira‐da‐Motta

et al. 2023

CLEAN Soil Air Water

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For this research, a 28‐day bioremediation experiment was conducted, simulating an oil spill on the Brazilian coast using mesocosm units and two different bioremediation strategies, adding rate‐limiting nutrients in the form of NPK fertilizer during the first four days (Bior1) and weekly (Bior2). The gas chromatography–mass spectrometry analysis results showed that oil natural degradation (Control) removed 33.8 wt.% of the alkanes on Day 7, while bioremediation processes plus evaporation in Bior1 and Bior2 contributed to minimizing alkanes in 83.4 and 80.8 wt.%, respectively. Bior1 strategy also accelerated the biodegradation of recalcitrant polycyclic aromatic hydrocarbons (PAH) such as phenanthrene, methyl phenanthrenes, and methyl dibenzothiophenes up to the second week when compared to Bior2. Low‐cost NPK fertilizer addition demonstrated efficiency in the bioremediation strategy, especially in the first days of the simulated oil spill (Bior1), leading to savings in time and financial investment in recovering an oil contaminated area. Results also showed the efficiency of the oil‐degrading bacteria Pseudomonas mesophilica, identified for the first time in Brazilian seawater. In addition, results confirmed the influence of tropical temperatures over oil natural natural degradation and bioremediation as an oil spill cleanup solution for recovering contaminated areas in tropical countries, especially in sensitive marine environments.

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Section: Daymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oil spill bioremediation strategies in Brazilian tropical seawater—The role of polycyclic aromatic hydrocarbons degradation

de Souza,

Becker,

Vieira‐da‐Motta

et al. 2023

CLEAN Soil Air Water

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“…Spills and leaks of crude oil have the potential to cause terrible harm to aquatic environments [ 2 ]. There is a possibility that these hazardous substances will enter the marine environment during the extraction, transportation and refining of crude oil, which would have negative effects on all biotic life [ 3 ]. Conventional techniques for cleaning up oil spills involve the use of mechanical tools like oil booms and skimmers, but these are labor- and money-intensive procedures [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Exploration and characterization of a newly isolated bacterium, Enterobacter quasihormaechei strain BDIFST24001, capable of producing rhamnolipid biosurfactant for oil remediation

Jui,

Bhuiyan,

Bhowmik

et al. 2024

Access Microbiology

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Biosurfactants are naturally occurring compounds synthesized by micro-organisms that increasingly attract attention due to both their living area and application in various industries. In this study, we explore and characterize a novel bacterium, Enterobacter quasihormaechei strain BDIFST24001, isolated for its ability to produce rhamnolipid biosurfactants, with the aim of facilitating oil remediation processes. The isolation of this bacterium was carried out using Luria-Bertani (LB) broth media from environmental samples collected from oil-contaminated sites in Dhaka City. Screening tests, including the oil spreading method and drop collapse assay, were conducted to identify potential biosurfactant-producing strains, leading to the selection of E. quasihormaechei strain BDIFST24001 based on its favourable performance. Subsequent molecular identification revealed a high similarity of the strain’s 16S rRNA gene to E. quasihormaechei, which was corroborated through phylogenetic analysis. Further analysis of the biosurfactant produced by this strain indicated its rhamnolipid nature, as confirmed by FT-IR spectroscopy. The rhamnolipids exhibited promising surface-active properties, including a significant reduction in surface tension and emulsification activity, as evidenced by surface tension measurements and emulsification index assays. Optimization studies revealed that the optimal conditions for rhamnolipid production by E. quasihormaechei strain BDIFST24001 were a temperature of 37 °C, pH 10.0 and salinity of 4 %. The rhamnolipids produced by this strain demonstrated effective oil remediation capabilities, as observed through controlled experiments using petrol oil. The rhamnolipids effectively reduced the surface tension of the oil–water interface, facilitating the dispersion and emulsification of the oil phase in water. Overall, our findings highlight the potential of E. quasihormaechei strain BDIFST24001 as a promising candidate for biosurfactant-mediated oil spill cleanup and environmental remediation efforts.

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Role of Biosurfactants in Marine Sediment Remediation of Organic Pollutants

Mgbechidinma

Xie

Zhang

et al. 2023

Advancements in Biosurfactants Research

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Microbial-induced biosurfactant-mediated biocatalytic approach for the bioremediation of simulated marine oil spill

Cited by 13 publications

References 44 publications

Oil spill bioremediation strategies in Brazilian tropical seawater—The role of polycyclic aromatic hydrocarbons degradation

Oil spill bioremediation strategies in Brazilian tropical seawater—The role of polycyclic aromatic hydrocarbons degradation

Exploration and characterization of a newly isolated bacterium, Enterobacter quasihormaechei strain BDIFST24001, capable of producing rhamnolipid biosurfactant for oil remediation

Role of Biosurfactants in Marine Sediment Remediation of Organic Pollutants

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