Recovery of Vanadium as Iron Vanadate (FeVO4) from Spent Sulfuric Acid Catalysts Using Oxalic Acid LeachingNoureddine EL Hasbaoui, Abdelouahab EL Hadrami and Rachid BrahmiBIO Web Conf., 215 (2026) 02011DOI: https://doi.org/10.1051/bioconf/202621502011