354 TRANSURANIC ELEMENTS IN THE ENVIRONMENT 



TABLE 7 (Continued) 



Plant species 



Range of CR 



Conditions and comments 



Reference 



Native vegetation 



10"' to 10'' 



Native vegetation 



10"^ to 10" 



Native vegetation 



10" 



Coconut 



10" 



Native perennials and shrubs 

 at the NTS environments 

 contaminated by safety 

 shots: resuspension and 

 deposition suspected on 

 hirsute plants. 



Mixed native grasses grown 

 in contaminated soil 

 blocks at Rocky Flats, 

 Colo.; metallic pluto- 

 nium in oil at 1 nCi/g 

 (soil); root and fobar 

 surface contamination 

 contributed about equally. 



Tree foliage and herbaceous 

 samples collected from 

 a floodplain in Oak 

 Ridge contaminated for 

 30 yr; evidence for 

 plutonium-organic 

 complex; plutonium in 

 monomeric forms. 



Same as for native vegetation; 

 coconut meat used for 

 human food in the 

 tropics. 



Romney et al., 

 1976 



Whicker, 1976 



Energy Research 

 and Development 

 Administration, 

 1976 



Koranda et al., 

 1973 



Pot culture 

 Alfalfa 



Alfalfa 



Bahia grass 



Barley 



Americium 



lO"'' to 10"^ Grown in 3 kg of NTS soil; 

 1 nCi/g(soU)of ' Am; 

 chelate increased CR; 

 OM tended to decrease 

 CR. 



10""' Grown in 1.2 kg of Los 



Alamos mountain 

 meadow soil spiked 

 with l8nCi to 0.5 

 juCi/g (soil) of '■* ' Am. 



10""" to 10~' Grown in 2 kg soil from 

 SRP; 0.5 kg of top 

 pot soil spiked with 

 Am(N03)3 to give 

 500 pCi/g (soil); lowest 

 CR caused by lime. 



10~' to 10° Grown in 500 g of soil 



spiked with 1 nCi/g 

 of "'" Amas Am(N03)3; 



This study 



Adams et al., 

 1975 



This study 



Wallace et al., 

 1976 



