||Plutonium uptake by plants from soil containing plutonium-238 dioxide particles /
Brown, K. W. ;
McFarlane., J. C.
||Environmental Monitoring and Support Lab., Las Vegas, Nev.
|| Environmental Protection Agency, Office of Research and Development, Monitoring Systems Research and Development Division, Environmental Monitoring and Support Laboratory ; For sale by the National Technical Information Service,
Growth (Plants) ;
Plant-soil relationships. ;
Plants--Effect of radioactive pollution on.
Plutonium 238 ;
Radioactive contaminants ;
Plutonium oxides ;
Plutonium isotopes ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||v, 13 pages : illustrations ; 28 cm.
Three plant species--alfalfa, lettuce, and radishes were grown in soils contaminated with plutonium-238 dioxide (238)PuO2 at concentrations of 23, 69, 92, and 342 nanocuries per gram (nCi/g). The length of exposure varied from 60 days for the lettuce and radishes to 358 days for the alfalfa. The magnitude of plutonium incorporation as indicated by the discrimination ratios for these species, after being exposed to the relatively insoluble PuO2, was similar to previously reported data using different chemical forms of plutonium. Evidence indicates that the predominant factor in plutonium uptake by plants may involve the chelation of plutonium contained in the soils by the action of compounds such as citric acid and/or other similar chelating agents released from the plant roots.
Issued May 1977. Includes bibliographical references (pages 12-13). Microfiche.