ESTUDO DE MECANISMOS DE RETENÇÃO DE ESPÉCIES METÁLICAS NO SEDIMENTO DAS LAGOAS DE DECANTAÇÃO DO ATERRO CONTROLADO DO BOTUQUARA

Abstract

The final disposition place of trash at Ponta Grossa city started out in 1969, in an appearance of garbage in the Botuquara’s region, and became the controlled garbage earthwork in 2001. The leach forming in this kind of landfill is, currently, the purpose of many studies principally in the vehicular of diseases and damages to the environment. The aim in this paper is to evaluate the characteristics of the sediments of the decantation lagoons that receive the percolado from the “Aterro Controlado do Botuquara” and of the soil next to the place where the last lagoon liberates to the environment this percolado, in order to evaluate if it is occurring retention of weighty metals, how is this retention, and also if the near area is receiving these metallic species. It were done accomplishing analyses of pH, OM, organic carbon, total nitrogen, C:N relation, CEC, K+, phosphates and sand contents, clay and silt to the sediments, as well as determined the concentrations of Cu, Cr, Fe, Mn, Ni, Ag, Pb and Zn the carbonates, organic substance, oxides of iron and manganese and the easily exchangeable ones in the samples of the sediments.The results show that the sediment possesss high texts of Mn, Fe, Cr, Ag, Ni, Cu, in some fractions of the collection points, mainly in the total fraction. The treatment lagoons are not being efficient, because of the total metal found in the landfill´s leach, when it is launched in the water will be able to modify its properties and to compromise its quality.