INFLUENCE OF STABLE Cs AND K ON THE REACTIONS OF Cs137 AND K42 IN SOILS AND CLAY MINERALS
Experiments were conducted to study the influence of stable Cs and K on the reactions of tracer quantities of Cs/sup 137/ and K/sup 42/ in soils and clay minerals, using an equilibrium batch method. Tracer quantities of both Cs/sup 137/ and K/sup 42/ were strongly sorbed in soils and clay minerals. Cesium was more strongly sorbed than K. Since the initial trace quantities of carrier-free Cs/sup 137/ were very strongly sorbed, the sequence of the addition of the tracer radioisotope in relation to the addition of stable Cs and K determined the level at which equilibrium was attained. The absolute amount of Cs and K sorption depended on the kind of clay mineral and soil. Cesium sorption relative to K was greater in Ca-clay than in H-Al-clay. The concentration of the stable Cs and K present was also an important factor. When the tracer Cs/sup 137/ was diluted to a negligible fraction of the total Cs in solution, only a negligible fraction of Cs/sup 137/ was sorbed. In equimolar mixtures of Cs and K, the sorption of Cs relative to K decreased as the ionic concentration increased. As a corollary to this effect, under conditions of low ionic concentration, stable Cs was much more effective than K in releasing Cs/sup 137/ from soils. In high concentraltions, however, K may be, in certain soils, as effective as stable Cs. (auth)
- Research Organization:
- Univ. of California, Los Angeles
- NSA Number:
- NSA-17-001233
- OSTI ID:
- 4776890
- Report Number(s):
- UCLA-496; 0038-075X
- Journal Information:
- Soil Science (U.S.), Journal Name: Soil Science (U.S.) Vol. Vol: 94; ISSN SOSCA
- Country of Publication:
- United States
- Language:
- English
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