Qualidade físico-química das águas do Ribeirão Biguaçu - Apucarana - Paraná

Abstract

The Ribeirão Biguaçu Basin, a sub-tributary of the Rio Bom, is located in the centersouth area of the municipality of Apucarana-PR, therefore, an assessment of water quality can show possible sources of contamination. In this work, physical-chemical analyzes of the waters of Ribeirão Biguaçu were carried out, by collecting water samples at four different points that the stream runs through. Among the main parameters, a large variation was observed in the parameters of Chemical Oxygen Demand, Nitrite, Nitrate, Hardness and metal analyzes showed a level of Aluminum above normal. The phosphate level was high at all points, the permitted limit was 0.025 milligrams per liter (mg L-1) and the lowest average among the samples was 0.11 mg L-1. The analyzes were carried out in partnership with the Municipal Government of Apucarana through the Secretariat of the Environment (SEMA), samples collected between the months of February 2022 and May 2023 were analyzed. I work on water quality, based on the standards and guidelines determined by the National Environmental Council (CONAMA). CONAMA guidelines classify Brazilian waters based on their chemical, physical and biological characteristics. The waters of Ribei-rão Biguaçu, in addition to all those in the Apucarana-Pr region, are classified as class II. The analyzes carried out on the samples compared with the CONAMA guidelines show that the points where the collection was carried out are not suitable for classification in class II.