Impacts of the urban solid waste disposal on the quality of surface water in three municipalities of minas gerais – brazil

Abstract

This study evaluated the environmental impact of different of Disposal of Urban Solid Waste-USWDA, on soil contamination and as a substrate for the establishment of plant species, in the areas already closed of the sanitary landfill of Campo Belo, controlled landfill (Santo Antônio do Amparo) and the dump (Elói Mendes), south of Minas Gerais-Brazil. The deformed and informed soil samples are collected in the 0-20cm layers, within the USWDA and in the 0-20 and 20-40cm layers upstream and downstream of each area. Cr, Cu, Ni, Zn, Cd, Pb, and Hg to evaluate the percolation potential of the leachated (total and particle density, liquidity and plasticity limits, total porosity and hydraulic conductivity) in the soil. Descriptive statistics and T-test were used and results compared with CONAMA Resolution 420/2009. Higher values of hydraulic conductivity and porosity were observed for the sanitary landfill. No heavy metals contamination was detected in the USWDA of Campo Belo and Elói Mendes. It was observed the contamination by Ni and Cr in the areas of controlled landfill, and sign of contamination in the downstream areas, besides the presence of Cu, possibly due to of the terrain topography. For plants establishment, the landfill is controlled the most restrictive.