Bioremediation potential of a halophilic Halobacillus sp. strain, EG1HP4QL: exopolysaccharide production, crude oil degradation, and heavy metal tolerance

Ibrahim, Ibrahim M.; Коннова, С. А.; Sigida, Elena N.; Lyubun, E. V.; Muratova, A. Yu.; Fedonenko, Yu. P.; Elbanna, Кhaled

doi:10.1007/s00792-019-01143-2

Cited by 46 publications

(21 citation statements)

References 52 publications

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“…Carbon sources are important factors determining the amount and the physicochemical characteristics of bacterial EPS [44]. Starch was ranked as the best substrate for extracellular polysaccharide production from Rhodotorula minuta ATCC 10,658 [65], as well as for Streptomyces sp.…”

Section: Discussionmentioning

confidence: 99%

“…Most of the microorganisms applied in situ oil recovery are oil-degrading microorganisms and can release extracellular emulsifiers to facilitate microbial oil uptake and degradation [108]. Since crude oil contains various metals, it is important for the microorganisms to be tolerant of these metals [44]. In this regard, it was of interest that MOE6-EPS could bind metal cations and some anions to protect cells and ensured the function of the bacteria in the oil-polluted environment.…”

Section: Discussionmentioning

confidence: 99%

“…The hydrophobic substrates used in this study were benzene, toluene and commercial engine oil (Power Care Premium 4-cycle Engine Oil 10 W-30, Selmer, TN, USA), as well as various commercial brands of vegetable oils, including pure corn oil and pure olive oil. The emulsification index after 24 h (E 24 ) was calculated according to the following equation [44]: E 24 = [the height of emulsion layer/the overall height of the mixture] × 100.…”

Section: Emulsifying Activities Of Moe6-epsmentioning

confidence: 99%

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Bioremediation Potential of Streptomyces sp. MOE6 for Toxic Metals and Oil

et al. 2021

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Toxic metal contamination has serious effects on human health. Crude oil that may contain toxic metals and oil spills can further contaminate the environment and lead to increased exposure. This being the case, we chose to study the bio-production of inexpensive, environmentally safe materials for remediation. Streptomyces sp. MOE6 is a Gram-positive, filamentous bacterium from soil that produces an extracellular polysaccharide (MOE6-EPS). A one-factor-at-a-time experiments showed that the maximum production of MOE6-EPS was achieved at 35 °C, pH 6, after nine days of incubation with soluble starch and yeast extract as carbon sources and the latter as the nitrogen source. We demonstrated that MOE6-EPS has the capacity to remove toxic metals such as Co(II), Cr(VI), Cu(II) and U(VI) and from solution either by chelation and/or reduction. Additionally, the bacterium was found to produce siderophores, which contribute to the removal of metals, specifically Fe(III). Additionally, purified MOE6-EPS showed emulsifying activities against various hydrophobic substances, including olive oil, corn oil, benzene, toluene and engine oil. These results indicate that EPS from Streptomyces sp. MOE6 may be useful to sequester toxic metals and oil in contaminated environments.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Emulsifying Activities Of Moe6-epsmentioning

confidence: 99%

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Bioremediation Potential of Streptomyces sp. MOE6 for Toxic Metals and Oil

et al. 2021

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“…Strain EG9S8QL was selected for further phenotypic and genotypic characterizations. The growth factors (pH, NaCl content, temperature, carbon sources, cultivation duration) were studied to obtain the maximum bacterial growth as described [ 38 ]. The culture was stored at −80 °C in an S-G medium with final concentration 20% of glycerol.…”

Section: Methodsmentioning

confidence: 99%

Structure of the 4-O-[1-Carboxyethyl]-d-Mannose-Containing O-Specific Polysaccharide of a Halophilic Bacterium Salinivibrio sp. EG9S8QL

et al. 2021

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The moderately halophilic strain Salinivibrio sp. EG9S8QL was isolated among 11 halophilic strains from saline mud (Emisal Salt Company, Lake Qarun, Fayoum, Egypt). The lipopolysaccharide was extracted from dried cells of Salinivibrio sp. EG9S8QL by the phenol–water procedure. The OPS was obtained by mild acid hydrolysis of the lipopolysaccharide and was studied by sugar analysis along with 1H and 13C NMR spectroscopy, including 1H,1H COSY, TOCSY, ROESY, 1H,13C HSQC, and HMBC experiments. The OPS was found to be composed of linear tetrasaccharide repeating units of the following structure: →2)-β-Manp4Lac-(1→3)-α-ManpNAc-(1→3)-β-Rhap-(1→4)-α-GlcpNAc-(1→, where Manp4Lac is 4-O-[1-carboxyethyl]mannose.

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“…Halophilic microorganism Halobacillus sp. EG1HP4QL develops the ability to utilize crude oil as the sole carbon source within 12 days and to degrade paraffin (34.5%), naphthalene (49.6%), mono- and bicyclic aromatic hydrocarbons (51.2%), polycyclic aromatic hydrocarbon (43.5%), and alcohol–benzene resins (25.5%) [ 106 ]. EPS-producing Halomonas strain TG39 was also used for bioremediation of a hydrocarbon-contaminated Deepwater Horizon spill site [ 107 ]; the extracted EPS was effective not only in increasing the solubilization of aromatic hydrocarbons but also in enhancing the degradation rate of phenanthrene.…”

Section: Bioremediation Using Extremophilesmentioning

confidence: 99%

Extremophilic Microorganisms for the Treatment of Toxic Pollutants in the Environment

Jeong

Choi

2020

Molecules

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As concerns about the substantial effect of various hazardous toxic pollutants on the environment and public health are increasing, the development of effective and sustainable treatment methods is urgently needed. In particular, the remediation of toxic components such as radioactive waste, toxic heavy metals, and other harmful substances under extreme conditions is quite difficult due to their restricted accessibility. Thus, novel treatment methods for the removal of toxic pollutants using extremophilic microorganisms that can thrive under extreme conditions have been investigated during the past several decades. In this review, recent trends in bioremediation using extremophilic microorganisms and related approaches to develop them are reviewed, with relevant examples and perspectives.

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Bioremediation potential of a halophilic Halobacillus sp. strain, EG1HP4QL: exopolysaccharide production, crude oil degradation, and heavy metal tolerance

Cited by 46 publications

References 52 publications

Bioremediation Potential of Streptomyces sp. MOE6 for Toxic Metals and Oil

Bioremediation Potential of Streptomyces sp. MOE6 for Toxic Metals and Oil

Structure of the 4-O-[1-Carboxyethyl]-d-Mannose-Containing O-Specific Polysaccharide of a Halophilic Bacterium Salinivibrio sp. EG9S8QL

Extremophilic Microorganisms for the Treatment of Toxic Pollutants in the Environment

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