Respostas do solo a disposição inadequada de resíduos sólidos no município de Nova Cruz-RN

Abstract

The final disposal of solid waste in dumps is an inadequate practice, since it is a potential source of contamination that can generate several negative impacts to the environment. In most cases, the deactivation of the dumps consists only in the closure of waste disposal and abandonment of the areas. For the recovery of these areas it is essential to evaluate soil quality, with the objective of adopting the most viable and efficient technical criteria of sanitary and environmental protection for the restoration of the ecosystem functions. In this context, the present study has as objective the evaluation of the physical and chemical attributes of the soil of a deactivated dump of the municipality of Nova Cruz, in the Agreste region of the state of Rio Grande do Norte, in order to identify the processes of degradation that should be remedied in its recovery programs in this area. Soil sampling was carried out in the areas of dump and native forest, which served as quality reference. The samples were submitted to analysis of the following physical and chemical attributes: soil density, particle density, particle size, total porosity, pH, electrical conductivity, organic matter and phosphorus. From the obtained results were identified the degradation processes in the area of the dump, such as alkalinity, salt enrichment, phosphorus and organic matter.