Biobarriers used in shallow-burial ground stabilization
These data show that cobblestone can be effective as a barrier to burrowing animals and insects, but not totally effective as a barrier to plant roots. Because of variable weather patterns at Hanford, five to six year studies are recommended for further evaluation of the effectiveness of different materials as biobarriers to radioactive substances. The following criteria must be met to present plant roots from entering buried waste and transporting radioactive or other elements to the soil surface where they can enter the food web: (1) the burial zone beneath the cover should be kept dry; (2) enough soil or other water-retaining substance should be placed in the cover to hold annual precipitation; (3) plants or other substances should be placed in the cover to remove soil moisture from site each year via evaporation and plant transpiration; and (4) different additions to the cover should be designed and placed over the buried waste to prevent burrowing animals from causing channelization of water through the cover to the lower levels. Stone size appeared to affect the plants' rate of root growth since root growth slowed in the air spaces between stones. Root toxin was 100% effective as a means of keeping roots out of the buried waste; this method could be used as a barrier modification where no plant cover is needed. 9 figures, 2 tables.
- Research Organization:
- Battelle Pacific Northwest Labs., Richland, WA (United States)
- DOE Contract Number:
- EY-76-C-06-1830
- OSTI ID:
- 5981274
- Report Number(s):
- PNL-2918; TRN: 79-016863
- Country of Publication:
- United States
- Language:
- English
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Biobarriers used in shallow burial ground stabilization
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Related Subjects
RADIOACTIVE WASTE STORAGE
UNDERGROUND STORAGE
ANIMALS
INSECTS
LOW-LEVEL RADIOACTIVE WASTES
PLANTS
RADIONUCLIDE MIGRATION
ROOTS
SOILS
ARTHROPODS
ENVIRONMENTAL TRANSPORT
INVERTEBRATES
MANAGEMENT
MASS TRANSFER
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
STORAGE
WASTE MANAGEMENT
WASTE STORAGE
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage