Avaliação da qualidade do solo e possível contaminação hídrica em propriedade rural localizada na região noroeste do Paraná

Abstract

The introduction of toxic components and inefficient management practices can cause pollution and degradation of the soil and consequently of the water, affecting food safety and human health of those who use the soil and consume water in contaminated regions. The study site presents possible polluting sources: agriculture and a junkyard with dismantling vehicles that may be harming the quality of the soil around the water sources. In this way, the present study aimed to analyze the quality of the soil close to a junkyard, an artesian well, a creek in the lowered portion and close to an arable area. After soil collection, a pHysical-chemical and ecotoxicological study was carried out on the meristematic cells of Allium cepa L. The pHysical analysis of granulometry and specific mass followed the provisions of ABNT 7181 and ABNT 6508, respectively. With regard to chemical analysis, this was submitted to the Atomic Absorption Spectrometry technique, after digestion of the soil by sulfuric attack (solubilization of H2SO4 1:1). The assessment of soil quality, with regard to the presence of chemical substances, was based on what was established in Conama Resolution No. 420/2009, amended by Resolution 460/2013, comparing the Guiding Reference Values for Quality, Prevention and Investigation. It was also analyzed the ester of organic matter and pH of the soil in all sampling points. The results showed that there was toxicity by heavy metals, but the content of Cu, Mn, Zn and Fe are far above desirable, which does not rule out future contamination of which does not rule out future contamination of water resources in the study region.