Application of Multivariate Data Analysis for Assessing the Early Fate of Petrogenic Compounds in the Marine Environment Following the Baltic Carrier Oil Spill

Christensen, Jan H.

doi:10.1080/10406630290103861

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…Changes in the 2MPhe/1MPhe ratio varied between the two microcosms (Figure 4). In the natural soil microcosm, the ratio dropped from 1.85 ( 0.03 to 0.26 ( 0.05 during biodegradation of the isomers, which is in accordance with observations from environmental biodegradation of oil (5,6,10). In the primed microcosm, however, the ratio initially dropped from 1.85 ( 0.01 to 0.67 ( 0.05, and then as biodegradation proceeded, the ratio increased to 0.91 ( 0.05.…”

Section: Kinetics Of 1mphe and 2mphesupporting

confidence: 89%

“…It has been suggested that environmental biodegradation of methylated PAHs can be described qualitatively by changes in diagnostic ratios of monomethylated PAH-isomers – . For this approach to be accurate, the microbial degraders must in general show isomer-specific PAH degradation.…”

Section: Resultsmentioning

confidence: 99%

“…It has therefore been suggested that changes in the ratios of isomer concentration of specific oil PAHs may diagnose the degradation mechanism, i.e., separate microbial oil degradation from physicochemical oil weathering , . Biodegradation of oils has been demonstrated using such changes in diagnostic ratios of methylnaphthalenes, methylfluorenes, methyldibenzothiophenes, and methylphenanthrenes – . 2- and 3-methylphenanthrene in oil may for instance be degraded faster than 1-, 4- and 9-methylphenanthrene ,, .…”

Section: Introductionmentioning

confidence: 99%

“…We chose 1-methylphenanthrene (1MPhe) and 2-methylphenanthrene (2MPhe) as model compounds because they are present in most crude oils and refined petroleum products, because they were commercially available, and because they have been found to exhibit isomer-specific removal during biodegradation of oil by bacterial pure cultures and consortia , and in the environment ,, .…”

Section: Introductionmentioning

confidence: 99%

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Isomer-Specific Biodegradation of Methylphenanthrenes by Soil Bacteria

Lamberts

Christensen

Mayer

et al. 2008

Environ. Sci. Technol.

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It is assumed that bacteria generally degrade 2-methylphenanthrene (2MPhe) in preference to 1-methylphenanthrene (1MPhe), and that environmental biodegradation of methylated PAHs therefore can be described qualitatively by changes in relative concentrations of these isomers. Our objective was to investigate whether microbial phenanthrene degraders (Sphingomonas and Mycobacterium) show such isomer-specific PAH degradation. Eleven out of twenty-nine phenanthrene degraders could grow on methylphenanthrene. The mycobacteria grew only on 2MPhe, the sphingomonads grew mostly on 1MPhe, and one sphingomonad could utilize both substrates. Seven strains were tested in a two-phase system where 1MPhe and 2MPhe were supplied in heptamethylnonane. For these strains, a consistent description of biodegradation based on the 2MPhe/1MPhe diagnostic ratio would not be possible because three Mycobacterium and one Sphingomonas degraded 2MPhe faster than 1MPhe, another Sphingomonas degraded 1MPhe and 2MPhe at almost equal rates, and two Sphingomonas degraded 1MPhe faster than 2MPhe. Thus, environmental biodegradation of phenanthrenes may theoretically proceed with only minor changes in 2MPhe/1MPhe ratios if individual members of the degrader community have different isomer preferences. However, two soil microcosms polluted with bunker oil confirmed the general decline in 2MPhe/1MPhe ratio during oil biodegradation.

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Section: Kinetics Of 1mphe and 2mphesupporting

confidence: 89%