PLUTONIUM, CURIUM, AND OTHER RADIONUCLIDE UPTAKE BY THE RICE PLANT FROM A NATURALLY WEATHERED, CONTAMINATED SOIL

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Abstract
A greenhouse study using three United States rice varieties (‘Belle Patna,’ ‘Nato,’ and ‘Starbonnet’) varying in maturity period and a widely used Asian variety (‘IR-1561’) indicates that, with the exception of 137Cs, no significant differences were obtained among varieties in the foliage uptake of selected gamma-emitters; the uptake of 238Pu, 239,240Pu and 244Cm appears to be similar. On the average, 137Cs and 40K were translocated less to the grain than to the foliage. The concentration ratio (CR) values for the gamma-emitters, with the exception of 40K, were approximately one order of magnitude higher than those for subterranean crops (onions, radishes, carrots, turnips, and white, red, and sweet potatoes) grown in experimental plots adjacent to a chemical separations facility at the Savannah River Plant. The CR values for 238Pu and 244Cm are within the range of values published in the open literature. The CR values for 239,240Pu, however, were higher than the normally reported values for plants grown in nonamended soils. The apparent greater availability of 244Cm than 238Pu is consistent with published values. A greenhouse study using three United States rice varieties (‘Belle Patna,’ ‘Nato,’ and ‘Starbonnet’) varying in maturity period and a widely used Asian variety (‘IR-1561’) indicates that, with the exception of 137Cs, no significant differences were obtained among varieties in the foliage uptake of selected gamma-emitters; the uptake of 238Pu, 239,240Pu and 244Cm appears to be similar. On the average, 137Cs and 40K were translocated less to the grain than to the foliage. The concentration ratio (CR) values for the gamma-emitters, with the exception of 40K, were approximately one order of magnitude higher than those for subterranean crops (onions, radishes, carrots, turnips, and white, red, and sweet potatoes) grown in experimental plots adjacent to a chemical separations facility at the Savannah River Plant. The CR values for 238Pu and 244Cm are within the range of values published in the open literature. The CR values for 239,240Pu, however, were higher than the normally reported values for plants grown in nonamended soils. The apparent greater availability of 244Cm than 238Pu is consistent with published values. © Williams & Wilkins 1981. All Rights Reserved.

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