Dr. Francisco Raúl Carrillo-Pedroza is a titular researcher and professor in the Metallurgy Faculty of the Autonomous University of Coahuila. He obtained his Ph.D. in metallurgical engineering in 2000 from the CINVESTAV-IPN Saltillo in Coahuila, Mexico. His experience and research interests include the hydrometallurgy of precious metals, copper, zinc, and lead, and the treatment of residues and wastewater in the mining industry.