المستخلص: |
In this work, the ex situ natural bioremediation of soil polluted by heavy fuel oil from an oil refinery, was conducted on period about of six months. Phenanthrene and methyl-phenanthrenes are most Aromatic pollutants originating specially from fuel oil. Phenanthrene is usually degraded faster than methyl-phenanthrenes under different environmental conditions. Here, we noted a preferential and accelerated biodegradation of methyl -phenanthrenes versus phenanthrenes in soil contaminated by fuel oil. The polluted soil is mixed microbial consortia isolated from crude oil contaminated soil and treated by bio-surfactants and nutritive substances for bio-stimulation. In the present investigation, the ex situ natural bioremediation of soil for a steady increase in the relative abundances of phenanthrene compared to methyl phenanthrene was observed by gas chromatography - mass spectrometry the increase was the highest for trimethyl phenanthrenes.
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