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The aim of this project was the total content characterization of heavy metals in two sanitary landfills, its distribution within its compartments (soil-waste-leachate-water) and also the understanding of heavy metal retention and release mechanisms may considering control and prevention of environmental impacts. The research consisted of soils (standard and contaminated) and leachates characterization, as well as data analysis of RMSP waste and ground water composition. The study of heavy metals Pb, Cu, Cr and Ni ionic behaviour was conducted by experimental columns that simulated sanitary cell. As a result of this work, it was observed ionic retention of metals in the waste mass, adsorption of heavy metals by cover soil particles and precipitation of metals as stable forms, due to physical-chemical and chemical conditions that occur within landfills. The leachate, therefore, shows low concentration of heavy metals. It was noted, however, that reduction conditions were imposed by organic matter decomposition to the environment, during anaerobic phases, causing the ionic release of manganese and iron to water wells nearby and in the limits of landfills.

ÍONS DE METAIS PESADOS EM SISTEMA SOLO-LIXO-CHORUME-ÁGUA DE