Survey on Physical, Chemical and Microbiological Characteristics of PAH-Contaminated Soils in Iran
Polycyclic aromatic hydrocarbons (PAHs) are one of the important groups of organic micro pollutants (Xenobiotics) due to their widespread distribution and low degradability in the environment (atmosphere, water and soil). Some PAHs exhibit carcinogenic and/or mutagenic properties and are listed by t...
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Published in | Iranian journal of environmental health science & engineering Vol. 1; no. 1 |
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Main Author | |
Format | Journal Article |
Published |
Iran
Iranian Association of Environmental Health (IAEH)
28.11.2006
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Subjects | |
Online Access | Get full text |
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Summary: | Polycyclic aromatic hydrocarbons (PAHs) are one of the important groups
of organic micro pollutants (Xenobiotics) due to their widespread
distribution and low degradability in the environment (atmosphere,
water and soil). Some PAHs exhibit carcinogenic and/or mutagenic
properties and are listed by the United States Environmental Protection
Agency (USEPA) and European Commission (EC) as priority pollutants. In
this research three petroleum contaminated sites in Iran were selected
in order to separate and classify PAHdegrading microorganisms. Samples
were analysed for: soil physico-chemical properties, soil particle size
distribution, Ultrasonic extraction of PAH (phenanthrene) and microbial
analysis. Ultrasonic extraction method was shown to be a reliable
procedure to extract a wide range of PAH concentrations from different
soils, e.g. clay, silt, and clay-silt mixtures. Results showed that the
extraction rate of phenanthreen in mentioned different soils was in the
range of 85 - 100 percent. Results showed that two of three selected
sites were contaminated with phenanthrene in the range of 10 - 100
mg/kg of soil, and had a reasonable population of PAH-degrading
bacteria, which were enable to adaptate and degradate a concentration
range of phenanthrene between 10 and 1000 mg/kg of soil. According to
results, it can conclude that, the bioremediation of contaminated soils
in Iran may be considered as a feasible practice. |
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ISSN: | 1735-1979 1735-2746 |