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. 2024 Aug 23;15:7271. doi: 10.1038/s41467-024-51540-1

Fig. 4. Long-term separation performance of the QA-TB membrane for monovalent and divalent anions.

Fig. 4

a Schematic illustration depicting the promotion of monovalent anion migration and limitation of divalent anion transport through the sub-nanochannels of the QA-TB membrane. b Comparison of monovalent and divalent ion fluxes over 12 days. c Ion concentration in the concentration chamber. d Perm-selectivity of the QA-TB membrane for Cl- and CO32- separation. e Comparison of monovalent and divalent anion separation performance of QA-TB membrane with previously reported membranes.