Author(s)

M.C. Vaz Carreiro & G.C. Ferrador

Abstract

Aquatic vascular plants, hydrophytes, are generally considered good indicators of radioactive pollution, as they may accumulate radiocaesium to a great extent, but this accumulation may be highly affected by the potassium concentration in freshwater. The present paper concerns the experimental study of the influence of several potassium concentrations in water on the radiocaesium accumulation by the hydrophyte Lemna minor. Concentrations used varied from 1 mM to 1 pM of K\ Radiocaesium concentration factor increases with decreasing K* concentration in water, for the range of 1 mM to 10 pM of Kaccording to the following equation: CFKCI = 508 e' '*™ + 7674 e'^ r*= 1, with M being the K* molarity. Therefore, at 0.01 mM, the approxima

Keywords