Diagnóstico da qualidade das águas superficiais nas proximidades do lixão de Mamanguape - PB

Abstract

The final disposal of waste deposits in the open sky, commonly represented by the "dumps", presents great potential for pollution, negatively impacting on the quality of human public health and environmental mainly in regions under its influence. In this work are assessed the concentrations of Cd, Cu, Fe, Mn, Ni, Pb and Zn in bays water (surface water and underground outcrops) and in liquid leachate (slurry) of the area of the dump for Pitombeira, Mamanguape - PB. The quality of water bodies located in the vicinity of this landfill was also evaluated on the basis of the analysis of other physical-chemical parameters (pH, temperature, dissolved oxygen and electrical conductivity). The results show that the highest concentrations of the metals are observed in manure accumulated in ditch artificial in the central region of garbage, indicating a high potential for contamination by the infiltration and runoff. In the same way, the quality of surface waters, used for multiple uses including human consumption, and bad, highlighting the presence of high level of Cd in all samples collected, reaching the equivalent nine times above the permissible limit by specific legislation. In addition to the Cd, the Faith (0.794 mg L-1) and Ni (0.035 mg L-1) also presented concentrations above the allowable limits by environmental law. In this way, it was found that the consumption of water sampled without criterion or some treatment, can bring harm to the health of the community, by present levels of contamination by heavy metals above the Brazilian standards.