Factors affecting the availability of americium-241 to the rice plant
Since there has been no published transuranic uptake data on the rice plant (Oryza sativa L.), greenhouse experiments were conducted to determine the effects of some factors on the uptake of /sup 241/Am by this crop. Results indicate that chelated /sup 241/Am (in the form of americium-241-diethylenetriaminepentaacetic acid) applied to the flood water was markedly taken up by the rice plant, compared to the nonchelated form. However, most of the accumulation of /sup 241/Am occurred in the vegetative parts and only trace amounts, if any, were translocated to the grain. Soil application of /sup 241/Am resulted in much lower uptake. Soil amendment with either diethylenetriaminepentaacetic acid (DTPA) or organic matter did not produce a discernible uptake pattern. A synthesis of published data on plant uptake of /sup 241/Am indicates that the concentration ratio (CR, a measure of availability of /sup 241/Am to the plants) values for /sup 241/Am for agricultural crops ranged from 10-/sup 6/ to 10/sup 1/ (from lowest to highest availability). Some factors that appear to influence /sup 241/Am uptake are as follows: plant parts (grain usually having lower CR), chelating agents (DTPA usually increasing the CR), organic matter (inconsistent effects although generally decreasing the CR), and lime (usually decreasing the CR).
- Research Organization:
- Savannah River Ecology Lab., Aiken, SC
- DOE Contract Number:
- EY-76-C-09-0819
- OSTI ID:
- 5297381
- Journal Information:
- J. Agric. Food Chem.; (United States), Vol. 27:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
AMERICIUM 241
ROOT ABSORPTION
RICE
RADIONUCLIDE KINETICS
SOILS
RADIONUCLIDE MIGRATION
CALCIUM OXIDES
CHELATING AGENTS
DTPA
GREENHOUSES
RESPONSE MODIFYING FACTORS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AMERICIUM ISOTOPES
AMINO ACIDS
BUILDINGS
CALCIUM COMPOUNDS
CARBOXYLIC ACIDS
CEREALS
CHALCOGENIDES
DRUGS
ENVIRONMENTAL TRANSPORT
GRAMINEAE
GRASS
HEAVY NUCLEI
ISOTOPES
MASS TRANSFER
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
RADIOISOTOPES
RADIOPROTECTIVE SUBSTANCES
UPTAKE
YEARS LIVING RADIOISOTOPES
560173* - Radiation Effects- Nuclide Kinetics & Toxicology- Plants- (-1987)
510301 - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- Soil- (-1987)