Control of BTEX migration using a biologically enhanced permeable barrier
Journal Article
·
· Ground Water Monitoring and Remediation
A permeable barrier system, consisting of a line of closely spaced wells, was installed perpendicular to ground water flow to control the migration of a dissolved hydrocarbon plume. The wells were charged with concrete briquets that release oxygen and nitrate at a controlled rate, enhancing aerobic biodegradation in the downgradient aquifer. Laboratory batch reactor experiments were conducted to identify concrete mixtures that slowly released oxygen over an extended time period. A full-scale permeable barrier system using ORC was constructed at a gasoline-spill site. During the first 242 days of operation, total BTEX decreased from 17 to 3.4 mg/L and dissolved oxygen increased from 0.4 to 1.8 mg/L during transport through the barrier. Over time, BTEX treatment efficiencies declined, indicating the barrier system had become less effective in releasing oxygen and nutrients to the highly contaminated portion of the aquifer. Point dilution tests and sediment analyses performed at the conclusion of the project indicated that the aquifer in the vicinity of the remediation wells had been clogged by precipitation with iron minerals.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 479376
- Journal Information:
- Ground Water Monitoring and Remediation, Journal Name: Ground Water Monitoring and Remediation Journal Issue: 1 Vol. 17; ISSN 1069-3629; ISSN GWMREV
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhanced bioremediation of BTEX using immobilized nutrients: Field demonstration and monitoring
Field results on the use of solid-phase oxygen supplementation compounds to accelerate intrinsic biodegradation of GRO and BTEX in a high K aquifer
Enhanced degradation of dissolved benzene and toluene using a solid oxygen-releasing compound
Technical Report
·
Sat Nov 30 23:00:00 EST 1996
·
OSTI ID:565479
Field results on the use of solid-phase oxygen supplementation compounds to accelerate intrinsic biodegradation of GRO and BTEX in a high K aquifer
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:569987
Enhanced degradation of dissolved benzene and toluene using a solid oxygen-releasing compound
Journal Article
·
· Ground Water Monitoring and Remediation; (United States)
·
OSTI ID:5217175