Optimizing Conditions for Scandium Extraction from Bauxite Residue Using Taguchi Methodology Lymperopoulou, Theopisti ; Georgiou, Paraskevas ; Tsakanika, Lamprini-Areti ; Hatzilyberis, Konstantinos ; Ochsenkuehn-Petropoulou, Maria Abstract Publication: Minerals Pub Date: April 2019 DOI: 10.3390/min9040236 Bibcode: 2019Mine....9..236L