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ENHANCED BIOREMEDIATION UTILIZING HYDROGEN PEROXIDE AS A SUPPLEMENTAL SOURCE OF OXYGEN: A LABORATORY AND FIELD STUDY
Citation:
Huling*, S G., B. E. Bledsoe*, AND M White*. ENHANCED BIOREMEDIATION UTILIZING HYDROGEN PEROXIDE AS A SUPPLEMENTAL SOURCE OF OXYGEN: A LABORATORY AND FIELD STUDY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-90/006 (NTIS 90-183435), 1990.
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Description:
Laboratory and field scale studies were conducted to investigate the feasibility of using hydrogen peroxide as a supplemental source of oxygen for bioremediation of an aviation gasoline fuel spill. Field samples of aviation gasoline contaminated aquifer material were artificially enhanced with nutrients to promote microbiological degradation of fuel carbon in a laboratory column experiment. he rapid rate of hydrogen peroxide decomposition at 100.0 mg/l resulted in the production of oxygen gas. n oxygen mass balance indicated that approximately 44.0% and 45.0% of the influent oxygen was recovered in aqueous and gaseous phases respectively. Reduced rates of oxygen consumption during this period indicated that microbial inhibition may have occurred. A mass balance of the fuel carbon indicated that approximately 36% of the initial mass leached out in the aqueous phase, 10.0% remained, and 54.0% degraded. he ratio of oxygen consumed to aviation gasoline degraded was greater than that predicted by the ideal stoichiometric conversion. ydrogen peroxide breakthrough in the column effluent never exceeded 11.0% of the influent concentration.Ground-water data from the enhanced in-situ bioremediation pilot field study indicates that hydrogen peroxide successfully increased the concentration of available oxygen down-gradient. n this study, however, it was observed that there was a measurable increase of oxygen in the soil gas area where hydrogen peroxide was injected. his indicated that a significant fraction of hydrogen peroxide rapidly decomposed to oxygen gas and escaped into the unsaturated zone.