| Abstrakt: |
Conclusions 1.A simulated system including all three basic components of a fresh-water reservoir (water, soil, and plants) proved to be most effective in removing natural radioactive elements from the water.2.In the simulated systems investigated, the predominant buildup of uranium occurred in plant materials, that of thorium occurred in detritus and soil, and an equilibrium distribution of radium occurred in the components of a standing reservoir.3.With the introduction of natural radioactive elements into a standing reservoir, there is observed migration of uranium and radium in soluble form while migration of thorium, and probably of radium D also, is practically excluded.4.In simulated systems of a standing reservoir, the greatest specific activity and buildup capability is possessed by detritus; they are present to a lesser extent for plant materials and to an insignificant degree for soil.5.The phenomenon investigated may find commercial application for secondary purification of liquid radioactive wastes in artificially constructed storage ponds in which (as a supplement to the main process of physical deposition of the radioactive impurities) are cultivated certain types of aquatic plants. |
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