Degradation of methyl-phenanthrene isomers during bioremediation of soil contaminated by residual fuel oil
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AuthorsNovaković, Milan D.
Ramadan, Muftah Mohamed Ali
Gojgić-Cvijović, Gordana D.
Vrvić, Miroslav M.
Article (Published version)
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Phenanthrene and methyl-phenanthrenes are major aromatic pollutants originating in particular from fuel oil. Phenanthrene is usually degraded faster than methyl-phenanthrenes under geological and environmental conditions. Here, we report a preferential and accelerated biodegradation of methyl-phenanthrenes versus phenanthrene in soil contaminated by fuel oil. The polluted soil was mixed with sawdust and sand to form a homogenized biopile. The biopile was continuously sprayed with microbial consortia isolated from crude oil-contaminated soil and treated by biosurfactants and nutritive substances for biostimulation. During a 6-month bioremediation experiment, a steady increase in the relative abundance of phenanthrene compared to methyl-phenathrenes was observed by gas chromatography-mass spectrometry. The increase was the highest for trimethyl-phenanthrenes, with a phenanthrene/trimethyl-phenanthrenes ratio increasing from 0.42 to 2.45. By contrast, the control, non-stimulated samples s...howed a ratio decrease from 0.85 to 0.11. Moreover, the results showed that the level of degradability depends on the number of methyl groups.
Keywords:Bioremediation / Soil / Residual fuel oil / Phenanthrene / Methyl-phenanthrene isomers / Degradation
Source:Environmental Chemistry Letters, 2012, 10, 3, 287-294
- Springer Heidelberg, Heidelberg
- Geochemical investigations of sedimentary rocks - fossil fuels and environmental pollutants (RS-176006)
- Simultaneous Bioremediation and Soilification of Degraded Areas to Preserve Natural Resources of Biologically Active Substances, and Development and Production of Biomaterials and Dietetic Products (RS-43004)