Bruno Valentim is a Principal Researcher at the Department of Geosciences, Environment and Spatial Plannings, University of Porto, Portugal. He holds B.A. degrees in Geology Educational Specialization, Geology Scientific-Technological Specialization, and Geology Scientific Specialization from the University of Porto. In 2000, he completed his Ph.D. in Geology at the University of Porto. He is a member of the International Committee for Coal and Organic Petrology. His research interests are coal and coal-combustion products' recycling, biomass-combustion products; recycling, Li-ion batteries' graphite and Li minerals' recycling, petrology, and geochemistry.