In situ BTEX biotransformation under intrinsic and nitrate- and sulfate-reducing conditions
- Stanford Univ., CA (United States); and others
Controlled amounts of BTEX compounds added to slugs of treated ground water were released into a gasoline-contaminated aquifer at Seal Beach (CA). In a series of studies, the slugs 470 to 1,700 L in volume were released into the aquifer. To evaluate nitrate-reducing and sulfate-reducing conditions, the injectate was also deionized and augmented with 200-300 {mu}g/L BTEX, nitrate or sulfate, and background electrolytes. Under intrinsic conditions, transformation appeared to be limited to slow removal of toluene and m,p-xylene. Under nitrate-reducing conditions, toluene, ethylbenzene, m-xylene, and o-xylene were transformed without a lag in less than 4, 6, and 70 days, respectively. Under sulfate-reducing conditions, toluene, m-xylene and o-xylene were completely transformed in less than 50 days, and ethylbenzene was removed in 60 days. Benzene was slowly removed, but the mechanism of removal could not be ascertained.
- OSTI ID:
- 370253
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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