Petroleum hydrocarbon biodegradation under mixed denitrifying/microaerophilic conditions
- Environmental Protection Agency, Ada, OK (United States). R.S. Kerr Environmental Research Lab.
Data are presented for aqueous-flow, soil-column microcosms in which removal of benzene, toluene, ethylbenzene, and xylenes (BTEX) is observed for two operating conditions: (1) nitrate, 25 to 26 mg(N)/L, as the single electron acceptor and (2) nitrate, 27 to 28 mg(N)/L combined with low levels of oxygen, 0.8 to 1.2 mg O{sub 2}/L. Soils used in this study include aquifer material from Traverse City, Michigan; Park City, Kansas; and Eglin Air Force Base (AFB), Florida. BTEX compounds are introduced at concentrations ranging from 2.5 to 5 mg/L, with total BTEX loading from 20 to 22 mg/L Complete removal of toluene and partial removal of ethylbenzene, m-xylene, and o-xylene were observed for all soils during trials in which nitrate was the only electron acceptor. Combining low levels of oxygen with nitrate produced varying effects on BTEX removal, nitrate utilization, and nitrite production. Benzene proved recalcitrant throughout all operating trials.
- Sponsoring Organization:
- Environmental Protection Agency, Washington, DC (United States); Department of the Air Force, Washington, DC (United States)
- OSTI ID:
- 484956
- Report Number(s):
- CONF-950483--; ISBN 1-57477-009-8
- Country of Publication:
- United States
- Language:
- English
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