Partially oxidized polycyclic aromatic hydrocarbons show an increased bioavailability and biodegradability |
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Authors: | Rogier Meulenberg Huub H.M Rijnaarts Hans J Doddema Jim A Field |
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Affiliation: | TNO Institute of Environmental Sciences, Energy Research and Process Innovation, Department of Environmental Biotechnology, P.O. Box 6011, NL-2600 JA Delft, The Netherlands;Wageningen Agricultural University, Department of Food Technology, Division of Industrial Microbiology, P.O. Box 8129, NL-6700 EV Wageningen, The Netherlands |
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Abstract: | Polycyclic aromatic hydrocarbons have a low water solubility and tend to adsorb on soil particles, which both result in slow bioremediation processes. Many microorganisms, known for their ability to degrade polycyclic aromatic hydrocarbons, only partially oxidize these compounds. White rot fungi, for instance, convert polycyclic aromatic hydrocarbons to more water soluble and bioavailable products. Polycyclic aromatic hydrocarbon metabolites were more readily mineralized by natural mixed bacterial cultures, like activated sludge and soil, than the parent polycyclic aromatic hydrocarbon compounds. These results suggest that sequential breakdown by white rot fungi followed by indigenous bacteria leads to an effective polycyclic aromatic hydrocarbon bioremediation process. |
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Keywords: | Polycyclic aromatic hydrocarbon Polycyclic aromatic hydrocarbon metabolite Polycyclic aromatic hydrocarbon oxidation Polycyclic aromatic hydrocarbon degradation Bioavailability Biodegradability |
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