Uptake and distribution of technetium in several marine algae

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6220585

Bonotto, S; Gerber, G B; Garten, Jr, C T; Vandecasteele, C M; Myttenaere, C; Van Baelen, J; Cogneau, M; van der Ben, D

The uptake or chemical form of technetium in different marine algae (Acetabularia, Cystoseira, Fucus) has been examined and a simple model to explain the uptake of technetium in the unicellular alga, Acetabularia, has been conceptualized. At low concentrations in the external medium, Acetabularia can rapidly concentrate technetium. Concentration factors in excess of 400 can be attained after a time of about 3 weeks. At higher mass concentrations in the medium, uptake of technetium by Acetabularia becomes saturated resulting in a decreased concentration factor (approximately 10 after 4 weeks). Approximately 69% of the total radioactivity present in /sup 95m/Tc labelled Acetabularia is found in the cell cytosol. In Fucus vesiculosus, labelled with /sup 95m/Tc, a high percentage of technetium is present in soluble ionic forms while approximately 40% is bound, in this brown alga, in proteins and polysaccharides associated with cell walls. In the algal cytosol of Fucus vesiculosus, about 45% of the /sup 95m/Tc appears to be present as anionic TcO/sup -//sub 4/ and the remainder is bound to small molecules. 8 references, 5 figures, 1 table.

• Research Organization: Centre d'Etude de l'Energie Nucleaire, Mol (Belgium); Oak Ridge National Lab., TN (USA); Institut Royal des Sciences Naturelles de Belgique, Brussels
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6220585
• Report Number(s): CONF-8309195-2; ON: DE85001113
• Country of Publication: United States
• Language: English

Related Subjects

560173* -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALGAE
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BIOLOGICAL ACCUMULATION
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
NUCLEI
ODD-EVEN NUCLEI
PLANTS
RADIOISOTOPES
TECHNETIUM 95
TECHNETIUM ISOTOPES
TISSUE DISTRIBUTION
UPTAKE