Selective separation of scandium from iron, aluminium and gold rich wastewater using various amino and non-amino functionalized silica gels - A comparative study | 2017 Publication type A1 Journal article (refereed), original research Author(s) Ramasamy Deepika Lakshmi, Puhakka Ville, Repo Eveliina, Sillanpää Mika Materials Chemistry Ceramics and Composites Chemical Engineering Colloid and Surface Chemistry Materials Science