EFFECT OF COMPOST AMENDMENT ON HEAVY METALS TRANSPORT TO PLANT

Concentration of heavy metals in environment has been significantly affected by human since last century. This work presents the analysis of the influence of compost amendment on heavy metals transport to the plant Lactuca sativa L. grown in contaminated soils. To demonstrate the effect of compost, a pot experiment was performed. Eight variants of soils with different concentrations of pollutants with and without compost amendment were prepared. The contaminated soils we used in our experiment come from the Nord France region Noyelles-Godault. Main pollutants were Pb, Cd and Zn. The decrease of heavy metals content in plants was observed by the simultaneous applications of compost to contaminated soils, from 10% to 50% in comparison with the variants without compost amendment. The BCF (bioconcentration factor) gives a clear view on reduced uptake of HM (heavy metal) by plant. Based on these results, we conclude that application of organic waste compost has positive effect on immobilization and bioavailability of heavy metals.