Análise físico-química e microbiológica das águas da praia Pedra do Sal na cidade de Parnaíba-PI

Abstract

Water is one of the most important chemical substances for the maintenance of life on Earth, being part of the composition of living beings. Among the bodies of water, salt water stands out, since they make up more than 95% of all water on earth, and because they are used for fishing, navigation, among others. Even though this water resource is important, it is not properly cared for, being the target of constant pollution by man. The objective of this work was to analyze the physical-chemical and microbiological parameters of the waters of Praia Pedra do Sal, located in the municipality of Parnaíba in the state of Piauí. The waters of Praia Pedra do Sal were characterized from physico-chemical and microbiological analyzes, using CONAMA Resolution No. 357, March 17, 2005, which refers to bathing water. Ministry of Health Ordinance No. 2914, December 12, 2011, was also used for comparative purposes, since there are some parameters that CONAMA Resolution No. 357/2005 does not address. For the physico-chemical characterizations, pH, Alkalinity, Hardness, Turbidity, Color, Iron, Ammonia and Chloride measurements were performed. For microbiological analysis, Enterobacteria, Staphilococus aureus, Bacilus cereus were determined. The results obtained in the physical-chemical characterizations are within the established standards of CONAMA Resolution 357/2005. In microbiological measures, the presence of bacteria was verified, which corroborates with the values of dissolved Oxygen, indicating the significant presence of organic matter in Point 3. Even with the parameters within the limits established for bathing water, a policy is important environmental education in Praia Pedra do Sal, since it is essential for the population of the Northern Region of Piauí.