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Iron-55 and zinc-65 in tissues of Columbia River carp

Technical Report ·
OSTI ID:7356565
Since the shutdown of the last Hanford reactor in 1971 the concentration of radioactivity in the sediments of the Columbia River should be diminishing by desorption, resuspension, physical decay, stable element dilution due to fresh inputs of sediments from upstream sources, and biological uptake. Results are reported from a study of the concentrations of /sup 55/Fe and /sup 65/Zn in the common carp, Cyprinius carpio, that lives in this environment of declining radioactivity. The carp is noted as a bottom feeder, thus putting it in contact with the sediments. Results showed that specific activities of /sup 55/Fe and /sup 65/Zn in the Columbia River system are declining in the order: carp tissues greater than sediments greater than physical decay rate of radionuclide. The finding is consistent with the concept that an organism at steady state will have a specific activity less than its source. The order of the rate of decline for sediment specific activity being greater than the rate of physical decay but less than that of the carp tissues supports the supposition that sedimentation in the river is a factor in the decline of radioactivity. (CH)
Research Organization:
Oregon Coll. of Education, Monmouth (USA)
OSTI ID:
7356565
Report Number(s):
TID-27125
Country of Publication:
United States
Language:
English

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Related Subjects

520300* -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1989)
520302 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- Aquatic Ecosystems & Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
ANIMALS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COLUMBIA RIVER
DAYS LIVING RADIOISOTOPES
ECOLOGICAL CONCENTRATION
ECOSYSTEMS
ELECTRON CAPTURE RADIOISOTOPES
ENVIRONMENTAL TRANSPORT
EVEN-ODD NUCLEI
FISHES
INTERMEDIATE MASS NUCLEI
IRON 55
IRON ISOTOPES
ISOTOPES
MASS TRANSFER
NUCLEI
RADIOACTIVITY
RADIOECOLOGICAL CONCENTRATION
RADIOISOTOPES
RADIONUCLIDE KINETICS
RADIONUCLIDE MIGRATION
RIVERS
SEDIMENTS
STREAMS
SURFACE WATERS
TIME DEPENDENCE
VERTEBRATES
YEARS LIVING RADIOISOTOPES
ZINC 65
ZINC ISOTOPES