Abstract
The Ribeira Valley region was an important mining center in Brazil, with several Pb's mines (6 in the state of Paraná and 3 in the state of São Paulo) and a lead smelter, located in Adrianópolis (PR). The company, responsible for processing and smelting Pb's ore (Plumbum), operated in the Ribeira Valley region, from 1945 to 1995. Throughout this period, this company was responsible for se…