Behavior of technetium-99 in soils and plants
Work described in this report is aimed at establishing the magnitude and mechanisms of $sup 99$Tc sorption by soils and uptake by plants. Studies showed that sorption of $sup 99$Tc by soils was essentially stopped by sterilization of the soil, further indicating that the sorption process is related to microbial activity. Studies also showed that sorption can occur under aerobic as well as anerobic conditions. However, there was considerable difference in the extent of sorption for different soils which remains to be explained. $sup 99$Tc was shown to be toxic to germinating seeds at low concentrations, but not when added to more mature plants. Initial evidence suggests this is a chemically rather than a radiologically induced toxicity but this remains to be completely resolved as well as whether there is a threshold level of $sup 99$Tc required before toxicity occurs. (auth)
- Research Organization:
- Minnesota Univ., St. Paul (USA). Dept. of Soil Science
- NSA Number:
- NSA-33-026009
- OSTI ID:
- 4025473
- Report Number(s):
- COO--2447-4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*PLANTS-- RADIONUCLIDE KINETICS
*SOILS-- RADIONUCLIDE MIGRATION
*TECHNETIUM 99-- TOXICITY
510302* --Environmental Sciences
Terrestrial--Radioactive Materials Monitoring & Transport--Terrestrial Ecosystems & Food Chains
ADSORPTION
AGE DEPENDENCE
CHEMICAL PROPERTIES
MICROORGANISMS
N44300 --Environmental & Earth Sciences--Radioactivity Monitoring & Transport
N44340* --Environmental & Earth Sciences--Radioactivity Monitoring & Transport--Ecosystems & Food Cycles
N48730 --Life Sciences--Nuclide Kinetics & Toxicology--Plants
SEEDS
UPTAKE
VARIATIONS
*SOILS-- RADIONUCLIDE MIGRATION
*TECHNETIUM 99-- TOXICITY
510302* --Environmental Sciences
Terrestrial--Radioactive Materials Monitoring & Transport--Terrestrial Ecosystems & Food Chains
ADSORPTION
AGE DEPENDENCE
CHEMICAL PROPERTIES
MICROORGANISMS
N44300 --Environmental & Earth Sciences--Radioactivity Monitoring & Transport
N44340* --Environmental & Earth Sciences--Radioactivity Monitoring & Transport--Ecosystems & Food Cycles
N48730 --Life Sciences--Nuclide Kinetics & Toxicology--Plants
SEEDS
UPTAKE
VARIATIONS