| Autor: |
ONYEMA, MARK O., OSUJI, LEO C., ILECHUKWU, IFENNA P. |
| Předmět: |
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| Zdroj: |
Journal of Applied Sciences in Environmental Sanitation; Dec2013, Vol. 8 Issue 4, p243-248, 6p |
| Abstrakt: |
The distribution and extent of petroleum hydrocarbon degradation by natural weathering process was studied. Gas chromatographic analyses of oil residues extracted from oil-spill soil samples with a post impact period of seven months revealed the presence of aliphatic hydrocarbons (AHCs) and polycyclic aromatic hydrocarbons (PAHs). Average concentrations of 5308.2mg·kg-1 for AHC and 13131.8 mg.kg-1 for PAHs classified the soils as heavily contaminated. Distribution of AHC from nC8 to nC37 and PAH from 2 ring naphthalene to 6 ring benzo(g,h,i)perylene in addition to source diagnostic Pr/Ph ratios from 2.10 to 3.05 confirmed the spilled oil was of Niger Delta origin. Reduced compositional abundance of nC8- nC13 (1.2%), nC14 - nC24 (5.8%) and 2-3 ring PAH (5.8%) points to the preferential degradation of low molecular weight petroleum hydrocarbons. Extent of petroleum hydrocarbon degradation was evaluated by distribution pattern of the aliphatic hydrocarbons, polycyclic aromatic hydrocarbons and diagnostic ratios of Pr/nC17, Ph/nC18 and Phe/Ant. The results showed significant variation from those of typical Niger Delta crude oils. This indicated the spilled oil had undergone extensive degradation of its petroleum hydrocarbon components since the spill incident and thus was highly weathered. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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