Improving the lithium recovery using leached beta-spodumene residues processed by magnetic nanohydrometallurgy

•Leached spodumene residues can be purified using superparamagnetic nanoparticles.•Magnetic extraction leads to pure β-spodumene for lithium capture.•Magnetic nanohydrometallurgy improves the lithium capture from 68.5 to 95% yield.•Lithium ions can be recycled using magnetic nanohydrometallurgy.