Caracterização química da água do Rio Ligeiro

Abstract

This study aimed to analyze the presence of potentially toxic metals and some physical-chemical parameters in the water of the Ligeiro River, whose river basin covers the cities of Bom Sucesso do Sul and Pato Branco, PR. The samples were collected in Pato Branco, covering two distinct areas of the river: one in the residential region and the other in the industrial area. In each area, five collections were carried out, and the samples were collected twice on different days, the first on 09/15 and the second on 10/01. The analyzes focused on determining the concentrations of the metals Aluminum (Al), Copper (Cu), Iron (Fe), Chromium (Cr), Nickel (Ni) and Zinc (Zn), in addition to evaluating physicochemical parameters such as pH, temperature, conductivity, total dissolved solids, chlorides and total nitrogen, the water collection and analysis techniques adopted were in accordance with the “Standart Methods for the Examination of Water and Wastewater”, of the American Public Health Association (APHA). The results obtained for each parameter were compared with the maximum permitted limits established by CONAMA Resolution No. 357, dated March 17, 2005, taking into account the river classification. All physical-chemical parameters analyzed were below the maximum permitted limits. However, the metals aluminum, copper and nickel presented concentrations above the maximum permitted values stipulated by regulation.