Abstract
A study of the uptake of 226Ra by vegetables was carried out in zones contaminated by wastes from an abandoned radium salts factory and from uranium mines and in uncontaminated regions of purely natural radioactivity. Radium-226 uptake depends on its concentration in the soil, the logarithm of its concentration in the vegetables being a linear function of the logarithm of the concentration in the soil. Concentration factors for 226Ra uptake by cabbage leaves range from 0·007 to 0·11; for herbage, they range from 0·09 to 0·5.
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