CARACTERIZAÇÃO DA QUALIDADE DA ÁGUA DA REPRESA DO TIJUQUEIRO LOCALIZADA NO MUNICÍPIO DE MORRINHOS-GO

Abstract

Water is essential for the maintenance of animal and plant life, because we need water with adequate quality and quantity to meet our demands for food, hygiene, health, among others. In recent years, there is an increase in the number of contaminated springs as a consequence of domestic, public and industrial residues that are dumped directly into the water bodies. Knowledge about these contaminants is important to better understand the health risks of the population, because some of these substances are harmful, presenting toxicities capable of causing diseases and pathologies. The use of chemical physical parameters to identify water quality is a way to monitor and extract information. In this study, the physicochemical characterization of the water from the Tijuqueiro dam located in the county of Morrinhos-Goiás, adjacent to the Instituto Federal Goiano Campus Morrinhos was carried out. Surface water samples were carried out on October 30, 2018. Along the route of the dam were selected 6 (six) points of collection of water samples that were subjected to the following analyses: PH, temperature, total solids content, conductivity, hardness and analysis of heavy metals using spectrometry Atomic absorption (AAS). The results were compared with Conama resolution 357/05 (Class 1) that establishes attributes of quality of use of these waters for human and animal consumption, as well as for the irrigation of vegetables that are consumed raw. Thus, it can be affirmed that some results were irregular when compared to the limits established by Brazilian legislation. The physicochemical data of the water samples collected in the region are within the standards. However, there were alterations in the analysis of heavy metals, such as iron, chromium and nickel that presented amounts higher than that allowed by the environmental organ. In this sense, the research has demonstrated in its scope that the high levels of these metals can be originated in most of the anthropic contaminations, which impair the quality of irrigation water and consequently interfere in the health of the consumers of the other Users. In order to achieve more detailed data, it would be interesting to perform different analyses and more thorough monitoring in the region, as these results are only indicative of the possible contamination of heavy metals in Surface waters of the Tijuqueiro Dam.