Dynamics of metals in lacustrine sediments: case study of the Madeira River, Amazon region

Dario Pires de Carvalho, Ronaldo de Almeida, Ângelo Gilberto Manzatto, Osvaldino Brito de Freitas, Wanderley Rodrigues Bastos
2018 Revista Brasileira de Recursos Hídricos  
The studies on metals in Madeira River's principal flow show high variability of Co, Cr, Cu, Fe, Ni, Pb and Zn concentrations. However, the transfer of these metals from the main river channel, whose physical and chemical characteristics differ from those of lakes, has not been fully characterized. The objective of this study was to discuss how the transfer of Madeira River's metals changes the spatial dynamics of these metals in sediments of the Puruzinho Lake (AM). The principal component
more » ... cipal component analysis pointed to differences in the order of the data, creating two distribution zones of metals. The average concentrations of Co, Cu, Cr, Mn and Fe are higher in the area under the influence of the suspended solids coming from the Madeira River. The zoning of metals in lakes is structured by the forces acting across the river's course at the same time as plains flood and generates ecotones.
doi:10.1590/2318-0331.231820170026 fatcat:h4nhxdlijrdxddmtrp4agjufya