Análise físico-química da Lagoa de Sobradinho zona rural de Luís Correia

Abstract

The study of the physical and chemical properties of water is an important means for determining the quality, concentrations, and acceptable rates set by the Ministry of Health, as well as the pollution indexes in the water body. Given that the organoleptic properties are affected, which in turn is directly linked to the population's life. This research aimed to perform the physical and chemical analysis of Sobradinho Lagoon, located in the rural area of Luís Correia in the state of Piauí. Being characterized as an experimental research and action research. Thus, 6 samples were collected during the rainy and dry periods on May 29th and October 9th, 2022, respectively, in the morning. Subsequently, the physical and chemical analyses of these samples were carried out in the chemistry laboratory of the Federal Institute of Piauí - Parnaíba Campus. In this way, the levels of acidity, alkalinity, total hardness, chlorides, consumed oxygen, color, turbidity, and pH were determined. Thus, the results obtained showed interference that can be related to various factors in managing this water body, such as dissolved organic matter in the environment determined by the consumed oxygen test, the release of domestic effluent (industrial waste) discarded in the vicinity of the lagoon and in the dune region, direct contact with the moving dunes, lack of rainfall in the location, the local vegetation, small-scale fishing activities, and the use of the area for pasture cultivation and animal husbandry that may be related to fecal contamination. However, the samples did not exceed the values delimited by the Ministry of Health's Order Nº 518/2004