Reload Index (ZRiChK UMCS)

 

 

STUDIES OF MIGRATION MECHANISM OF RADIOACTIVE ISOTOPES IN NATURAL ENVIRONMENT

 

STANISŁAW CHIBOWSKI, JAN SOLECKI,

MAREK RESZKA

DEPARTMENT OF RADIOCHEMISTRY AND COLLOID CHEMISTRY

 

 

Studies of the transfer of 137Cs and 90Sr isotopes from soil to plant are presented. Grass and soil samples were collected from meadows along the Bug river. Selected sampling points were located 10-50 m from the river. An influence of calcium and potassium ions on the transfer of radioactive elements was examined. Obtained data are listed in table.

Table. Transfer factors of 137Cs and 90Sr for grass from Bug river valleys.

Sample

90Sr

transfer factor

137Cs

transfer factor

1

0,0168

0,0779

3

0,0587

0,0502

4

0,3935

0,2072

5

0,0479

0,1122

6

0,1417

0,6307

7

0,0417

0,2737

8

0,2783

0,0345

9

0,1433

0,3109

10

---

0,6378

arithmetic mean

0,14 ± 0,13

0,26 ± 0,23

 

Following conclusions can be drawn from the measurements:

n   average transfer factors are 0.26±0.23 for 137Cs and 0.18 ± 0.15 for 90Sr.

n   137Cs isotope transfer is almost two times higher than 90Sr.

n   cesium isotope transfer is markedly depressed by potassium ions

n   accumulation of strontium is depressed by calcium ions

 

Grant KBN 3T09C 03415