Μελέτη της διακίνησης και συμπεριφοράς ιχνοστοιχείων κατά τη διαχείριση στερεών αποβλήτων

Abstract

In the present thesis three where the key aims: 1) to evaluate the dispersion of tracemetals during MSW management at the EMAK “Mechanical, Recycling and Compost”producing municipal solid waste (MSW) Treatment plant (Mechanical and BiologicalTreatment, MBT) of the city of Athens, 2) to define the quality of the plant‟s products, RDFand compost, and 3) to identify the mobility of a series of metals, namely Cu, Mn, Zn, Pb, Cdand Cr when using the compost for cultivation of turf grasses and ornamentals.Systematic sampling of MSW, RDF and compost was taking place from 13/6/2006 to31/5/2007. Heavy metal concentrations were determined by employing Atomic AbsorptionSpectrometry. The results show that the mechanical treatment of MSW enriches RDF andcompost in heavy metals. Nevertheless, both products comply with the EuropeanCommission‟s norms and legislation and Greek Government‟s laws and are considered safefor use.Grass varieties C. dactylon and F. arundinacea, were treated with MSW compost atrates 12% and 25% by volume. MSW compost treatments increased soil heavy metalcontent, although the tissue and the leaching water content did not show any dramaticalincrease. No signs of phytotoxicity were observed in any of the above cases.MSW compost was mixed with a peat-based growing-media at rates of 12.5%, 25%,and 37.5% by volume. Ornamental species Ligustrum japonicum grew in those mixtures withand without addition of NPK fertilizer. In the non-fertilized treatments, the increase of MSWcompost ratios to peat resulted also in higher heavy metals concentration in plant tissue.Fertilization increased even more the concentration of heavy metals in the tissues of theplants examined in most of the cases. Copper does not follow this general trend of themetals studied, eventually due to formation of very stable not bioavailable copper complexeswith organic legands deriving from the compost