Abstract
The aim of this research is the heavy metals (Pb, Cu, Cr, Ni) behavior associated with a soil/waste/leachate system of two sanitary landfills in the Sao Paulo Metropolitan Region, Sao Paulo State. The investigation of the conditions that have influence on metals release, migration and fixation and their interaction with other materials or substances (leachate and solid waste, cover soil) was conducted in two parts. In the first part, the ionic distribution of metals in landfill cells was carried out with soil and leachate sampling and characterization. The second part consisted of cell simulations with reproduction of chemical and physic chemical processes that occur in a landfill, emphasizing heavy metals fixation and mobility mechanisms.
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