Accession Number:

ADA224705

Title:

Biodegradation of Jet Fuel in Vented Columns of Water-Unsaturated Sandy Soil

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1990-01-01

Pagination or Media Count:

173.0

Abstract:

The effect of soil water content on the rate of jet fuel JP-4 biodegradation in air-vented, water-unsaturated columns of sandy soil was investigated. The contaminated soil was obtained from a spill site located on Tyndall AFB, Fla. The initial soil loading was 4590 mg of JP-4kg of dry soil. Three laboratory columns were packed with the contaminated soil, saturated and drained for periods of 81-89 days. Two columns were continuously vented with air, and the third, intended to provide an anaerobic control, was vented with nitrogen. The venting gas flows were maintained between 1 and 2.5 soil pore volume changeouts per day. The total JP-4 removal in the air-vented columns averaged 44 of the mass originally present. Biodegradation and volatilization accounted for 93 and 7 of the total removal, respectively. A maximum biodegradation rate of 14.3 mg of JP-4kg of moist soil per day was observed at a soil water content of approximately 72 saturation. Soil drainage characteristics indicated that this water content may have corresponded to 100 of the in situ field capacity water content. Theses.

Subject Categories:

  • Soil Mechanics
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE