Análise sazonal de parâmetros físico-químicos da água da Lagoa Grande de Buriti dos Lopes - PI

Abstract

Water is the essence of life on planet Earth; it is a fundamental resource for maintaining the environment and is associated with virtually all of man's daily activities. However, the continuous and inadequate use of this resource has been a social concern for a long time, due to the effects that such anthropogenic actions cause on the quality and quantity of water in nature. The lagoon of Buriti dos Lopes-PI has been undergoing frequent changes through the release of pollutants of various types around its waters, showing a disregard on the part of the population. In this sense, the present study aimed at analyzing the physical-chemical properties (alkalinity, color, chloride, hardness, pH, total solids and turbidity) of the water of the big Buriti lagoon and evaluating eventual changes of these parameters in the seasonal periods of flood and drought. Water samples were collected at two different points in the lagoon in each seasonal period. The determination of each parameter was carried out according to specific methodologies, and the results obtained were evaluated according to the CONAMA resolution No. 357 of 2005. The parameters varied according to seasonality, presenting higher values for the dry period, where total solids and turbidity were the only parameters that presented values above the limits established by legislation. The results show that in the flood season the water of the lagoon is within the standards of the current legislation, while in the dry season its properties are altered and some parameters are above the maximum limit required. Thus, the geoenvironmental characteristics of the lagoon during the dry season directly influence the quality of its water