Sequential extraction allows more detailed information about the origin of heavy metals in natural environments, their mode of occurrence, biological and physico-chemical availability, mobilization and transport. To study the Pb and Zn forms, eight soil profiles were selected at different sites within a Pb mining and metallurgy area in the city of Adrianópolis, state of Paraná, in the Rio Ribeira valley. Samples were collected from the layers 00-10, 10-20 and 20-40 cm. The total Pb and Zn contents and their […]