Table 2 Electrical voltage measurement split-up table for mixing between NaCl and MgCl\(_2\) for a fixed salinity ratio Ra of 30.

From: Mitigating the influence of multivalent ions on power density performance in a single-membrane capacitive reverse electrodialysis cell

NaCl fraction

MgCl\(_2\) fraction

Salinity ratio

\(E_{OCV-c}\) (V)

\(E_{OCV-f}\) (V)

\(E_{elec-f}\) (V)

\(E_{m}\) (V)

\(E_{elec-c}\) (V)

Ra

\(2(E_{m}+E_{elec-c})\) (V)

Mixing of NaCl–MgCl\(_2\) in both solutions

1

0

30

0.265

0.145

0.070

0.075

0.057

0.8

0.2

30

0.252

0.139

0.067

0.072

0.054

0.6

0.4

30

0.230

0.131

0.070

0.061

0.054

0.4

0.6

30

0.212

0.120

0.065

0.055

0.051

Mixing of NaCl–MgCl\(_2\) only in the diluted solution

1

0

30

–

0.144

0.070

0.074

/

0.8

0.2

30

–

0.142

0.069

0.073

/

0.6

0.4

30

–

0.139

0.069

0.070

/

0.4

0.6

30

–

0.131

0.069

0.062

/

0.2

0.8

30

–

0.120

0.069

0.061

/

  1. Two scenarios are investigated here: The mixing in both concentrated and diluted solutions, and mixing only in the diluted solution. The measurement uncertainties mainly come from the electrode potential contribution in faradaic system \(E_{elec-f}\) with a error bar estimated as 1 - 3 mV for different experiment series.
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