| Popis: |
The behavior of radium, one of the main natural radionuclides which enters the food chain, was investigated in plants growing in monazite-bearing soils. Massive accumulation of radium was observed to occur in the roots. The quantity of radium translocated to the shoots was significantly less. Concentration ratio values obtained for shoots and roots ranged from 0.01 to 3.36 and 0.05 to 2.86, respectively. Concentrations of radium in the plants are discussed in terms of soil acidity and availability of calcium, a chemically similar stable element in the external milieu. Study of the chemical state of radium in the plant tissues collected from monazite-bearing soils indicated that significant amounts of radium were associated in ionic forms. |
