Avaliação da ferramenta QualiGraf para a obtenção de balanço iônico em águas para consumo humano

Abstract

Access to water quality is a right for all, decreed by law, in addition to being an essential asset to the lives of human beings and other living beings. To achieve that, numerous chemical analysis can be done to determine where the sample comes from, whether it is suitable for human consumption or not. Thus, this work studies the Ionic Balance of samples of water for human consumption using the QualiGraf Software and the use of the methods of Logan and Custódio and Llamas. To ensure that, the following tests were conducted: Chloride, Sodium, Potassium, Calcium, Total hardness, Sulfate, Conductivity, Total alkalinity and Partial alkalinity. The procedures are in accordance with the Standard Methods for the Examination of Water and Wastewater, the results obtained were also compared in accordance with PRC nº 05, 09/17 of the Ministry of Health and with the National Environment Council n° 396, 04/08 of the Ministry of the Environment. In addition, the Piper's Diagram was used to classify the waters adding more information to the work. According to the results, among the 20 samples analyzed, 7 did not meet any adopted methods, 6 did not meet at least one of the two methods and 7 satisfied both methods. Therefore, the probable reasons why some samples do not show ion balance may be related to the field stages (sample transfer), as well as to the lack of analysis of any particular analyte that has any significant effect on the solution.