ACCUMULATION OF CD, PB, CU, MN, AND ZN BY SYLIBUM MARIANUM L. GROWN ON POLLUTED SOILS
The content of Cd, Pb, Cu, Mn and Zn in soils, plant parts (roots, stems, leaves and seeds), in fat oil and sylimarin were determined on Inductively Coupled Plasma (ICP) apparatus.
It was found that: In field experiments the rate of heavy metal concentration in spot 1 at 0.8 km from the smelter (with content of Cd, Pb, Cu and Zn above or within critical levels for these elements in soils) decreased the yield of seeds by 16 % compared to the control, while yields from spot 2 (at distance of 3 km from the smelter) were 11% lower then in the control, in both cases without visible toxicity symptoms.
In pot experiment, seed yield from soil 1 (taken at 0.8 km from the smelter) was 13 % lower then from the control (soil taken at 10 km from the smelter), while yields from the other soils (taken at 3 and 6 km from the smelter) were not significantly affected by heavy metal pollution.
Content of sylimarin and fat oil in the seed was not affected by heavy metal pollution, besides these products were not contaminated.