Enhancing Ion Transfer in Overlimiting Electrodialysis of Dilute Solutions by Modifying the Surface of Heterogeneous Ion-Exchange Membranes

Table 2

Ratio of Na⁺ to Cl⁻ mass-transfer coefficients for ED cells with modified and commercial membranes at different feed solution concentrations and potential drops per cell.

𝐶NaCl, mol dm^−3	𝑘^MK-40/NfNa+/𝑘^MK-40Na^+			𝑘^MA-40MCl^−/𝑘^MA-40Cl^−
	2.5 V	4.0 V	6.0 V	2.5 V	4.0 V	6.0 V
0.02	1.0±0.1	1.2±0.1	1.0±0.1	1.0±0.1	1.2±0.1	1.0±0.1
0.01	1.2±0.1	1.4±0.1	1.0±0.1	1.3±0.1	1.3±0.1	1.0±0.1
0.005	2.0±0.1	1.7±0.1	1.2±0.1	1.8±0.1	1.7±0.1	1.2±0.1