Determination of the biodegradation rate of asphalt for the Hanford grout vaults. Hanford Grout Technology Program
Testing was initiated in March 1991 and completed in November 1992 to determine the rate at which asphalt is biodegraded by microorganisms native to the Hanford Site soils. The asphalt tested (AR-6000, US Oil, Tacoma, Washington) is to be used in the construction of a diffusion barrier for the Hanford grout vaults. Experiments to determine asphalt biodegradation rates were conducted using three separate test sets. These test sets were initiated in March 1991, January 1992, and June 1992 and ran for periods of 6 months, 11 months, and 6 months, respectively. The experimental method used was one originally developed by Bartha and Pramer (1965), and further refined by Bowerman et al. (1985), that determined the asphalt biodegradation rate through the measurement of carbon dioxide evolved.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10149867
- Report Number(s):
- PNL-8599; ON: DE93012399; TRN: 93:016177
- Resource Relation:
- Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ASPHALTS
BIODEGRADATION
CARBON DIOXIDE
CHEMICAL REACTION YIELD
HANFORD RESERVATION
MICROORGANISMS
GROUTING
REACTION KINETICS
CONTAINMENT SYSTEMS
052002
360604
WASTE DISPOSAL AND STORAGE
CORROSION, EROSION, AND DEGRADATION