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Metal contents in Egeria densa, Egeria najas and Ceratophyllum demersum biomass

This study was carried out to estimate the metallic element contents in three submerged aquatic macrophytes, seeking to evaluate the participation of these plants in metal removal in the water and to create a data base to predict the environmental impact of the discard in soil or in the water, itself. Samples were dried, milled and taken to laboratories for element analysis and quantification. The highest concentrations of elements for the three species were observed during the summer, with a decrease in the winter, mainly for Vanadium and lead. Mercury was not detected in the samples.

aquatic macrophytes; mechanical control; metallic elements

Sociedade Brasileira da Ciência das Plantas Daninhas Departamento de Fitotecnia - DFT, Universidade Federal de Viçosa - UFV, 36570-000 - Viçosa-MG - Brasil, Tel./Fax::(+55 31) 3899-2611 - Viçosa - MG - Brazil