Metal Quantification in the Sediment of the Guarapiranga Reservoir (SP) Karen de Souza Ferreira, Bárbara Rani-Borges, Thaís Fabiane Gomes Martins, Ivan Edward Biamont-Rojas, Marcelo Pompêo

Abstract

The Guarapiranga reservoir (SP) is strategic for public supply, and is influenced by the anthropic activities. Sediments, as evidence of contaminants, such as metals, are important in assessing the quality of water bodies. This study aimed to determine the levels of concentration of metals nickel and zinc, present in the superficial sediments and to evaluate the quality of the sediment using the reference values ​​established by the CONAMA. Samples were collected in Jun/19, at 12 points, with the aid of a “Lenz” type sampler and the metals analysis was performed by ICP-AES. The Reservoir presented average concentrations of 11.02 mg.kg^-1 of nickel and 120.16 mg.kg^-1 of zinc. The metals presented at least one point with values ​​that did not comply with the 454/12 Conama resolution. Such results indicate a possible heterogeneity of the reservoir for the analyzed metals and reinforce the need to monitor the quality of the sediment and water.