AVALIAÇÃO DA CONCENTRAÇÃO DE METAIS PESADOS NO ENTORNO DE MORRINHOS GO UMA ANÁLISE MULTIELEMENTAR EM SEDIMENTO DE CORRENTE E ÁGUA

Abstract

The work, conducted in Morrinhos city, state of Goiás, Brazil, aimed to evaluate the concentration of heavy metals in the environment drainages in the lake located at its urban area, in the ETA - Estação de Tratamento de Água (an water treatment station) of SANEAGO (the state company responsible for water treatment and supply), and also in five households. All the work was done through an analysis multi-elemental by using twenty-eight samples of surface water and running sediment. This evaluation aimed to raise the possible natural and anthropogenic environmental contamination, in order to relate them to the people healthy. It was obtained the water physical-chemical patterns (by analyzing dissolved oxygen, pH, turbidity and conductivity), which were duly represented through maps of distribution. It was performed the chemical analysis on the samples of running water and sediment through the methods of AA, ICP-OES, ICP-MS and Liquid Chromatography. From the results obtained and statistically treated were made four correlation matrices from each sample, as defined the geochemical of each matrice and developed others sixty seven selected maps for the chemical distribution. The analysis of the results in running sediment showed high concentrations for Cd, Cr and Sb. In the analysis of the results in surface water were found abnormal results for the elements Ag, Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Hg, Mg, Ni, Pb, Sb and V. It was observed that, each greater the distance of sampling points from its source (near to the urban area), greater the environmental impacts caused by the anthrop action. Such impacts are due to the fact of drainages being used for recreation and leisure, irrigation of crops, gardens and orchards, in addition the water is been used as containers of sewage. The results obtained show an environment risk situation which can jeopardize the healthy of the people, who use the water on the region.