Bioremediation of Crude Oil Polluted Soils

Erdoğan, Esin Eraydın; Karaca, Ayten

doi:10.3923/ajbkr.2011.206.213

Cited by 52 publications

(42 citation statements)

References 12 publications

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“…The data obtained support the general idea now accepted by the scientific community that no species of microorganisms will completely degrade any particular oil (Erdogan and Karaca, 2011). The degradation of both crude and refined oils usually involves a consortium of microorganisms, including both eukaryotic and prokaryotic forms (Ko and Lebeault, 1999;Röling et al, 2002).…”

Section: Discussionsupporting

confidence: 81%

“…Usually, toxic components of petroleum may selectively inhibit microorganisms producing a shift in population size and species diversity within the soil (Bossert and Bartha, 1984;Labud et al, 2007). Also, the addition of petroleum hydrocarbons to the soil environment affects soil properties which ultimately affect the microbial community (Franco et al, 2004;Labud et al, 2007;Erdogan and Karaca, 2011). The enrichment of the soils resulted in the isolation of more bacteria compared to yeasts and molds.…”

Section: Discussionmentioning

confidence: 99%

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Degradation of aviation fuel by microorganisms isolated from tropical polluted soils

Omotayo¹,

Efetie²,

Oyetibo³

et al. 2011

International Journal of Biological and Chemical Sciences

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The degradation of aviation fuel was observed in soil samples from a polluted site at the aviation fuel depot, Lagos Airport, Nigeria. The percentage of occurrence of bacterial aviation fuel-utilizers were less than 1.0% of the heterotrophic populations, while the fungal-degraders were between 2.547-16.053%. There were no significant statistical differences for both the bacteria and fungi estimations among the soil samples. Enrichment of soil samples with aviation fuel resulted in the isolation of five bacteria (Pseudomonas aeruginosa, Micrococcus luteus, Corynebacterium sp., Flavobacterium rigense, Bacillus subtilis), three yeasts (Rhodotorula sp., Candida tropicalis, Saccharomyces sp.) and two molds (Aspergillus niger, Penicillium sp.). Utilization of the substrate by bacteria and yeast isolates resulted in an increase in population density and subsequent decrease in pH value and residual aviation fuel concentration. Over 90% of the n-alkane fraction of the aviation fuel supplied at 0.5% v v -1 concentration was degraded in 14 days by Pseudomonas aeruginosa, Micrococcus luteus and Corynebacterium sp. There were differential growth responses by the strains to dodecane, benzene, toluene and naphthalene, while growth was not supported by hexane and cyclohexane. Thus, enrichment with of soil contaminated with aviation fuel led to the isolation of competent hydrocarbon degraders.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Degradation of aviation fuel by microorganisms isolated from tropical polluted soils

Omotayo¹,

Efetie²,

Oyetibo³

et al. 2011

International Journal of Biological and Chemical Sciences

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“…Physicochemical and biological methods are employed in the remediation of polluted soils (Okoh, 2006;Erdogan and Karaca, 2011). The physicochemical methods of remediation of oil polluted soils are associated with high cost, laborious and above all they often achieve incomplete removal ofthe contaminants from the soil (Eckenfelder and Noris, 1993).…”

Section: Microbial J 1 (4): 139-148 2011mentioning

confidence: 99%

Preliminary Study on Biodegradation of Nigerian Natural Bitumen

Olabemiwo¹,

Adediran²,

Adekola³

et al. 2011

Microbiology J.

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One of the major problems facing the existence of man in this millennium is pollution. Thus, it is no surprise that much attention is given to pollution control and remediation of polluted environment. While remediation can be achieved by physicochemical and biological methods, application of the latter tends to be gaining upper hand due to some of its inherent advantages. This study investigated the biodegradability of bitumen from Agbabu, Southwestern Nigeria by hydrocarbon utilizing strains of Pseudomonas putrefaciens, Pseudomonas nigrificans, Bacillus licheniformis, Pseudomonas tragi and Achromobacter aerogenes. The organisms were used to inoculate Mineral Salts Medium (MSM) supplemented with 0.2 g L-1 solution of Agbabu bitumen in dichloromethane. Cultures were inoculated at different temperature and pH (27°C/pH 3.5; 27°C/pH 5.6; 30°C/pH 7.0 and 40°C/pH 7.0) for two weeks. The quantity of bitumen degraded by each organism was determined gravimetrically at the end of first and second week. The rate of degradation was calculated for each organism and residual bitumen analyzed by infraredSpectroscopy. In the first week of incubation, Achromobacter aerogenes exhibited the highest rate of degradation (1.750±0.027 mg h-1 ) at 30°C and pH 7 while Bacillus licheniformis showed the least degradation rate (0.300±0.018 mg h-1 ) at 40°C and pH 7. Structural indices such as aromaticity, sulphonation, aliphaticity and oxidation calculated from the infrared spectra of recovered bitumen from the inoculated samples were different from that of the control. This thus, confirms the degradation capability of the bacteria used in this work on the Agbabu bitumen and hence their potentials for use in bioremediation of bitumen-polluted environments.

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“…Biosurfactants are literally surfactants from biological sources. These compounds are produced by various microorganisms to considerably improve the bioavailability of water-immiscible hydrocarbons as carbon and energy sources for them, whereby enhance their consumption rate (Bento et al 2005;Erdogan and Karaca 2011;Pirollo et al 2008). They have the ability to accommodate themselves between liquid phases with different degrees of polarity such as water-oil due to their amphiphilic nature, thereby increasing the oil-water interfaces (Singh et al 2007;Van Hamme et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Bioemulsification activity assessment of an indigenous strain of halotolerant Planococcus and partial characterization of produced biosurfactants

Ebrahimipour

Gilavand

Karkhane

et al. 2014

Int. J. Environ. Sci. Technol.

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Halotolerant bacteria are regarded as effective oil-scavengers in the polluted saltern and seawater. In this regard, a halotolerant Planococcus was isolated from oilcontaminated area of Dezful north springs, Iran, due to its capacity in biosurfactant (BS) production. To facilitate hydrocarbons degradation, in the current study, the efficiency of BS production as function of growth rate of the halotolerant Planococcus was investigated in the vicinity of heavy crude oil by emulsification index (E24). Subsequently, the BS characterization was made by thin-layer chromatography (TLC), gas chromatography (GC) and infrared spectra analysis, and the stability was determined by E24 value measurement over a certain pH (5-9), temperature (20-100°C) and salt concentration (0-10 % w/v) ranges. The BS production was found to be growth-associated. Detection of a unique band on TLC and GC chromatogram showed the extensive refining capacity of the BS purification, using the medium supernatant under acetone alkaline precipitation followed by oil dissolution from the sediment by carbon tetrachloride. Accordingly, it was clarified that the BS ultimately accumulated outside the cells. The glycolipid quality of the BS was further determined by the routine chemical characterization on TLC and by IR spectra analysis. Moreover, there was no protein detected by lowery total protein assay. Finally, the optimal temperature, pH and NaCl concentration to reach highest E24 values (85.7, 77.0, and 79.0 %) were found at respective 40°C, pH = 9 and 0 % w/v. Our results revealed the practically potential of strain Dezful Isolate for BS large-scale production as environmentally friendly oil-eliminating agents.

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Bioremediation of Crude Oil Polluted Soils

Cited by 52 publications

References 12 publications

Degradation of aviation fuel by microorganisms isolated from tropical polluted soils

Degradation of aviation fuel by microorganisms isolated from tropical polluted soils

Preliminary Study on Biodegradation of Nigerian Natural Bitumen

Bioemulsification activity assessment of an indigenous strain of halotolerant Planococcus and partial characterization of produced biosurfactants

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