Monitoramento das propriedades físicas, químicas, microbiológicas e toxicológicas dos balneários de Porto Mendes, Entre Rios do Oeste e Águas e Terras

Abstract

The monitoring of the resorts of Porto Mendes, Entre Rios do Oeste and Águas e Terras, aimed to determine the physical, chemical, microbiological and toxicological properties of three resorts on Lake Itaipu, on the Paraná River, located in the western region of the state. The points were monitored for a period of 12 months, from March 2022 to February 2023, and evaluated and quantified how the respective properties behaved over the period, which comprised the four seasons of the year. In addition, knowing the physical, chemical and microbiological quantitative of the aquatic environment was important in the detection of possible pollutants, fecal and total coliforms and toxic agents. Toxicity tests were carried out, used to indicate the presence of contaminants in the three spas. For this, the freshwater microcrustacean, Ceriodaphnia dubia, was used, evaluating it in relation to reproduction and mortality. The reproduction of the test microorganisms was inhibited in the reproduction of neonates in the following months and resorts: april, resort 1; october, seaside resort 1; november, resort 2 and 3 and february, resort 1. The physical, chemical, microbiological and toxicological properties suffered interference from local and regional factors. The results obtained from the chemical, physical and microbiological analyzes were statistically analyzed and studied through principal component analysis (PCA), in which the variables were correlated in 5 significant axes and explained in 72,8%. The axes showed the correction between the studied variables.