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- Author or Editor: D. Breban x
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Abstract
The paper presents a laboratory experimental model based on a simplesoil-plant system used to investigate the potential effectiveness of potassium-basedfertilisers in reducing soil-to-plant transfer of radiocesium. The soil-plantsystem, slightly modified comparing to that described originally in the NEUBAUER'splantlet method, consists in wheat plantlets grown from caryopsis phase onbrown acid soil contaminated with 137Cs resulted from Chernobylnuclear accident and treated with potassium salt of 30%. The effectivenessof 30% potassium salt applied to the soil as treatment is discussed in termsof reduction factor for 137Cs soil-to-plant transfer coefficientand 137Cs + :K + ratio in soil and plantlets.
Abstract
Activity concentrations of Pu radioisotopes and 241Am were determined in the organic and mineral layers of four soil sections collected in 1996, providing for the first time information on the levels of these radionuclides in soil samples from Romania. The investigated site was an alpine pasture located in the Charpathian Mountains, in an area found as one of the most affected in Romania after the Chernobyl accident. In the examined soil sections radioactive inventories were estimated to be 500 Bq/m2 for 241Pu, 115 Bq/m2 for 239+240Pu, 8 Bq/m2 for 238Pu and 50 Bq/m2 for 241Am. On the basis of activity ratios in the soil profile, the source of the radioactive release is discussed.
