Use of ionic liquids as green solvents for extraction of Zn2+, Cd2+, Fe3+ and Cu2+ from aqueous solutions

1. Hernández-Fernández, F.J.
2. De Los Ríos, A.P.
3. Ginestá, A.
4. Sánchez-Segado, S.
5. Lozano, L.J.
6. Moreno, J.I.
7. Godínez, C.