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• W70645616 abstract "to man is one of the complex problems arising from reactor operations. Most of the information on the plant to n obtained from laboratory experiemnts utilizing nutrient solutions, prepared soils, and soils contaminated by weapons fallout. Little work has been done on these reLong-term studies on permanent areas contaminated with these radionuclides have not been reported. Oak Ridge National Laboratory has an area which is uniquely suited for long-term studies under field conditions. This area was formerly a 40-acre radioactive waste impoundment (White Oak Lake) which for 12 years received a continuous input of low-level radioactive wastes. Two years ago the gasin was drained, leaving about 35 acreas of contaminated terrain. The resulting soil in this area can be characterized as a relatively unconsolidated alluxial sediment, heterogeneous in composition, calcareous, somewhat saline, and alkaline in reaction. Concentrations of strontium-90 and cesium-137 in the first six inches range from 0.02 to 0.29 and from 0.5 to 2.0 microcuries per 100 grams of soil, respectively. Significant concentrations of cobalt-60, ruthenium-106, cerium-144, and the trivalent rare earths are present also. The mu mu c Sr-90 to 1 gram Ca* and the mu mu cCs-137 to 1 gram K ratios in the leaves ofmore » one pf tje matove STA;amts ){p;ugonum lapathifolium L.) on the lake bed ranged from 5.64 x 10 to 1.91 x 1/sup 5/ and from 7.73 x 10/sup 4/ to 1.67 x 10/sup 5/, respectively. As a part of the investigations of uptake by vegetation, four common varieties of corn (Zea mays), namely, Hickory Cane, try Gentleman, were planted in a part of the lake bed laid out in a latin square. Chemical and radiochemical (particularly strontium-90) analyses for the corn plants and native vegetation have not yet been completed nor have the data as yet been given a thorough statistical analysis. How-ever, the first results indicate that the concentra tions of cesium-137 to potassium ratios in the leaves, husks, cobs, and grain have the following ranges: Leaves, 2.91 x 10/sup 4/ to 5.87 x 10/sup 4/; husks, 2.18 x 10/sup 4/ to 4.18 x 10/sup 4 cobs, 1.76 x 10sup 4/ to 2.0 x 10/sup 4/; grain 1.54 x 10/sup 4/ to 1.84/ x 10/sup 4/. These data indicate a considerable discrimination against cesium-137 on the basis of 1 N ammonium acetate soil extractions of these cations. The strontium90--calcium ratios obtained in this calcareous soil varied with the mode of extraction of those cations. The range of variation compares favorably with that reported by other workers. (auth) .« less" @default.
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• W70645616 title "STRONTIUM-90 AND CESIUM-137 UPTAKE BY VEGETATION UNDER NATURAL CONDITIONS" @default.
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