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(377) Field Performance Evaluation of Bioremediation of PAH Contaminated Sediments at the Libby, Montana Superfund Site.
Sims, R*,1, Sims, J1, Sorensen, D1, 1 Utah State University, Logan, UT
ABSTRACT- A field evaluation of sediments contaminated with PAHs as a result of wood preservation waste spills and land disposal was undertaken for the U.S. EPA Office of Solid Waste and Emergency Response and the Office of Research and Development. The evaluation was supported with radiolabeled chemical mass balance laboratory evaluations to assess the microbial metabolic potential of sediment materials to accomplish bioremediation under different management conditions. Evaluations of PAH fate with nutrient and oxygen injection, potential abiotic reactions with nanoparticles, oxygen and alternative electron acceptors, and vertical heterogeneity were completed. PAH intermediates and fugacity modeling was used to assess the fate and transport of PAHs in the destruction at the site, with rate and extent significantly affected by environmental conditions. The potential applications of genetic probes and biosensors is also addressed.
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