Vale (Brazil)

Geogenic controls and anthropogenic inputs on the seasonal hydrogeochemical variability of the Paraopeba River basin, Brazil

Abstract This study investigates the combined effects of geology, land use and land cover, hydrological seasonality, and disturbance history on the hydrogeochemistry of surface waters in the Paraopeba River Basin (PRB), located in Minas Gerais State, southeastern Brazil, and form...

Hydrodynamic classification of a binary density feed with no by-pass

The hydrodynamic classification of two minerals of very different density, silica and hematite, was investigated using a modified REFLUX™ Classifier known as the GradePro™. The primary objective was to achieve efficient classification with no by-pass, meaning no entrainment of re...

Integrated source apportionment and geochemical background assessment of organic and inorganic components in Amazonian upland lakes: insights from an extensive basin-wide geochemical database

Abstract Purpose This study established reliable natural geochemical backgrounds for Amazonian upland lakes and evaluated how lateritic catchment materials are transferred and transformed in lake sediments across Carajás, Araguaia, and Xingu. Methods Ferruginous duricrusts and la...