Monitoramento de parâmetros físico-químicos e microbiológicos do riacho Araibu no município de Russas-CE

Abstract

Water is an essential input for life, considering the fact that it is related to health, since the availability of quality water for consumption hinders the spread and contagion of diseases. Besides the direct consumption by the population, water is used in the irrigation and industrial sectors. Furthermore, it is necessary for non-consumptive use, such as fishing, leisure, and navigation. Considering that the Araibu Creek is distributed in the urban extension of the municipality of Russas-CE, it is of great relevance for agricultural and livestock activities in the region, and in flood situations, it becomes a tributary of the Jaguaribe River. Therefore, the present work aims to investigate physical-chemical and microbiological parameters of the Araibu Creek. The collections for the analyses were made between the months of August and December, so a total of 15 samples were collected for a single point, distributed over the five months. The parameters analyzed were pH, conductivity, total dissolved solids, turbidity, alkalinity, chlorides, total residue and total hardness, and indicative of the possible presence of total coliforms and Escherichia Coli . At the end of this study they demonstrated that, during the research period, there was a gradual and evident increase in the concentrations and rates of all the physical-chemical parameters analyzed and positive results for the microbiological tests in the totality in the analyses, justified by the low rainfall level, high evapotranspiration rate of the region and considerable domestic dumping in the creek. Among all the physical-chemical parameters, only pH showed acceptable values, however, only in the first two months, to the others, the results exceeded the limits defined by CONAMA Resolution No. 357 of 2005 and Ordinance No. 5 of 2017 of the MS (Ministério da Saúde), considering that the water of Araibu River is unsuitable for any type of use.