Fig. 1: Lithium separation performance and transport mechanisms in selective membranes.
From: Preference of negatively charged membranes in magnesium and lithium separation by nanofiltration

a Li+ and Mg2+ rejections of the membrane reported in the literature (data source available in Supplementary Table 1). Each dashed line connects data points from the same \({{{{\rm{S}}}}}_{{{{{\rm{Li}}}}}^{+}/{{{{\rm{Mg}}}}}^{2+}}\). b Effect of \({{{{\rm{S}}}}}_{{{{{\rm{Li}}}}}^{+}/{{{{\rm{Mg}}}}}^{2+}}\) and ion rejections on lithium purity and lithium recovery. Schematic illustration of the c co-ion competition and d co-ion partitioning.