Effects of alkylphosphates and nitrous oxide on microbial degradation of polycyclic aromatic hydrocarbons

Applied and Environmental Microbiology
Bill W BoganJ R Paterek

Abstract

We conducted a series of liquid-culture experiments to begin to evaluate the abilities of gaseous sources of nitrogen and phosphorus to support biodegradation of polycyclic aromatic hydrocarbons (PAHs). Nutrients examined included nitrous oxide, as well as triethylphosphate (TEP) and tributylphosphate (TBP). Cultures were established using the indigenous microbial populations from one manufactured gas plant (MGP) site and one crude oil-contaminated drilling field site. Mineralization of phenanthrene was measured under alternative nutrient regimes and was compared to that seen with ammoniacal nitrogen and PO(4). Parallel cultures were used to assess removal of a suite of three- to five-ring PAHs. In summary, the abilities of the different communities to degrade PAH when supplemented with N(2)O, TEP, and TBP were highly variable. For example, in the MGP soil, organic P sources, especially TBP, supported a considerably higher degree of removal of low-molecular-weight PAHs than did PO(4); however, loss of high-molecular-weight compounds was impaired under these conditions. The disappearance of most PAHs was significantly less in the oil field soil when organophosphates were used. These results indicate that the utility of gaseous n...Continue Reading

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Citations

May 16, 2009·Journal of Hazardous Materials·A K Haritash, C P Kaushik
Aug 27, 2005·Canadian Journal of Microbiology·J A HumphriesC G Johnston
Sep 18, 2003·International Journal of Systematic and Evolutionary Microbiology·Bill W BoganJ Robert Paterek
Oct 13, 2016·Environmental Science and Pollution Research International·Keith Fluegge

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