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THE INFLUENCE OF ORGANIC MATTER ON LIMITING THE BIOAVAILABILITY OF HEAVY METALS
Abstract
Plants are the main recipient of heavy metals found in soil, being at the same time a source of these metals for plants, animals and human organisms. The search for methods limiting the availability of heavy metals remains valid. Many years of research are being carried out at the Warsaw University of Technology, regarding limiting the availability of heavy metals to the trophic chain by introducing into the soil organic matter. The aim of the study was to analyse the content of heavy metals (Zn, Pb, Cd) in radish under conditions of varied soil reaction and organic matter content. Under the influence of organic matter introduced into the soil with a brown coal preparation - Rekulter, the availability of zinc, lead, and cadmium decreased, thus their uptake by radish was significantly lower. The content of zinc, lead and cadmium in radish was the smallest in the variant with the highest dose of Rekulter on the slightly acidic soil. Bioaccumulation index (BI) of zinc, cadmium, and lead were at a low level, but the lowest BI values occurred in the case of lead.
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