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Figure 7: KCl, NaCl and LiCl transport through PET membranes at pH 5.5, (I) LiCl, PAA membrane, (I`) LiCl, P(AA-co-DEGMEM) membrane, (II) KCl, PAA membrane, (II`) KCl, P(AA-co-DEGMEM) membrane, (III) NaCl, PAA membrane, (III`)NaCl, P(AA-co-DEGMEM) membrane.