Bacterial degradation and emulsification of No. 6 fuel oil

Zajic, J. E.; Supplisson, Bernard; Volesky, B.

doi:10.1021/es60092a010

Cited by 38 publications

(10 citation statements)

References 6 publications

(6 reference statements)

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“…The content of polar compounds always increased. This corresponds with the literature [2,4,[19][20][21]. The effect is more distinct for the clean distillates/raffinates (items 1-4, Table 2) than for the extracts which already have high portions of resins.…”

Section: Main Compound Classessupporting

confidence: 88%

Analytical characterization of the persistent residues after microbial degradation of mineral oils

Riis

Miethe

Möder

1996

Fresenius J Anal Chem

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The residual fractions remaining after microbial degradation of diesel fuel, different deparaffinized raffinates and extracts from long-term contaminated soils were analyzed by liquid chromatography, gas chromatography, infrared spectrometry and mass spectrometry. The quantity of saturated hydrocarbons decreased after the microbial treatment, whereas the portion of polar compounds increased. The total content of aromatics changed only insignificantly. n-Paraffins < C26 were found to be no longer present in mineral oils degraded to exhaustion. Infrared spectrometry revealed oxygen compounds in the residues, mainly ketones, fatty acids and esters. Elementary analysis confirms the presence of nitrogen, oxygen and sulphur compounds in the degraded products. The gas chromatograms of high boiling oils, as well as of residues and extracts, consist mainly of a large base "envelope" (about 95% of the total area); thus gc/ms coupling reaches the limits of its applicability. However, mass spectrometry with direct inlet gives valuable information regarding hydrocarbon type analysis. The results revealed the preferable degradation of alkanes, 1-ring aliphatics and benzenes and an enrichment of condensed cycloaliphatics and aromatics. The latter compounds are known to be resistant to microbial attack.

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Section: Main Compound Classessupporting

confidence: 88%

Analytical characterization of the persistent residues after microbial degradation of mineral oils

Riis

Miethe

Möder

1996

Fresenius J Anal Chem

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“…Reisfeld et al (233) have studied an Arthrobacter strain which extensively emulsifies oil when growing on hydrocarbons. Zajic and co-workers (297) have characterized the emulsifying agents produced by strains of Pseudomonas and Corynebacterium. In some cases, the emulsifying agents appear to be fatty acids or derivatives of fatty acids; in other cases, more complex polymers are the active emulsifying agents.…”

Section: Environmental Factors Influencing Biodegradation Ofmentioning

confidence: 99%

Microbial degradation of petroleum hydrocarbons: an environmental perspective.

Atlas¹

1981

Microbiological Reviews

1,045

414

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ION OF PETROLEUM HYDROCARBONS 181 in the light (mixotrophic growth), but were unable to utilize this alkane in the dark (191). The major product formed by Agmenellum and Oscillatoria species was 1-naphthol (61). These organisms also formed cis-1,2-dihydroxy-1,2dihydronaphthalene and 4-hydroxy-1-tetralene (68). These results suggest that cyanobacteria have a variety of mechanisms for initiating the oxidation of naphthalene. The Oscillatoria species also has been found to oxidize biphenyl, indicating that a wider range of aromatic hydro

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“…In addition, micro-organisms are able to produce a great variety of other interfacial-active molecules, among them lipids, biosurfactants and polymeric emulsifiers (Haferburg et al, 1986;Rosenberg, 1986). However, the literature contains only a few reports of emulsionstabilizing polysaccharides (Cirigliano & Carman, 1985 ;Cooper et al, 1980;Fattom & Shilo, 1985;Floodgate, 1978;Kappeli & Fiechter, 1977;Kaplan & Rosenberg, 1982;Kaplan et al, 1985;Zajic et al, 1974Zajic et al, , 1977aZuckerberg et al, 1979). With the exception of emulsifiers from two Acinetobacter calcoaceticus strains, most of these polysaccharides are not well characterized.…”

Section: Introductionmentioning

confidence: 99%

Structural studies of an emulsion-stabilizing exopolysaccharide produced by an adhesive, hydrophobic Rhodococcus strain

Neu¹,

Dengler²,

Jann³

et al. 1992

Journal of General Microbiology

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The primary structure of an emulsion-stabilizing exopolysaccharide from the adhesive, hydrophobic Rhodococcus strain No. 33 was elucidated by NMR spectroscopy, methylation analyses, periodate oxidation and oligosaccharide analyses. The polysaccharide PS-33 consisted of rhamnose, galactose, glucose and glucuronic acid in molar ratios of 2: 1:l:l. The main chain contained 3-substituted &-D-g~UCUrOniC acid linked to the 3-position at a-L-rhamnose, in addition to 3-substituted residues of P-D-galactose and a-D-glucose. The a-L-rhamnose of the side chain was linked to position 4 of the galactose. In addition, the polysaccharide was 0-acetylated, corresponding to one acetyl group per repeating unit. From the results two structural possibilities could be suggested. As the polysaccharide carries hydrophobic groups (methyl of rhamnosel0-acetyl), it is very likely that these are of general significance for the emulsifying activity of polysaccharides. It also seems to be possible that this polysaccharide is at least partially responsible for the hydrophobic cell surface properties of the Rhodococcus strain No. 33 and it may be involved in hydrophobic interactions when adhering to hydrophobic interfaces.

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Bacterial degradation and emulsification of No. 6 fuel oil

Cited by 38 publications

References 6 publications

Analytical characterization of the persistent residues after microbial degradation of mineral oils

Analytical characterization of the persistent residues after microbial degradation of mineral oils

Microbial degradation of petroleum hydrocarbons: an environmental perspective.

Structural studies of an emulsion-stabilizing exopolysaccharide produced by an adhesive, hydrophobic Rhodococcus strain

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