Avaliação de trihalometanos no sistema de abastecimento de água em Palmas-TO

Abstract

Water is a finite and irreplaceable resource in everyday life, used for various activities in our daily lives. Water, if not treated for human consumption, can be a disseminator of waterborne diseases for the population. For the disinfection of water and the elimination of pathogens, chlorine has been the most used chemical agent, due to its high efficiency and low cost. Therefore, the objective of this work was to verify the values of the chlorine and turbidity parameters, distributed in the southern region of the municipality of Palmas-Tocantins. Chlorine was quantified by the portable digital colorimeter and turbidity by the lab turbidimeter in the water sample collection site. For the quantification of trihalomethanes, gas chromatography equipment coupled with mass spectrometry (CG-EM) was used. The study showed that the chlorine and the turbidity found, are in accordance with Consolidation Ordinance No. 5, regardless of the point of collection. Regarding the quantification of trihalomethanes, methodological problems and / or low levels of these substances, they did not allow obtaining conclusive results regarding the presence or not of these compounds in the samples.