Table 1 Parameters derived from the anodic potentiostatic tests for different bentonite slurries carried out for 20 mins

From: Anodic dissolution mechanisms of iron in bentonite slurries

Bentonite content in the slurry, wt %

Rs -start, Ω at t = 0 min

Rs- finish, Ω at t = 20 min

Gel pH

Slurry pH

Mass change, g

Q (Integrated charge), C

1.6

415

403

5.5 ± 0.3

9.5 ± 0.5

0.16

0.51

468

457

n.d.

8.7 ± 0.3

0.13

0.58

3.2

163

157

6.5 ± 0.5

9.5 ± 0.5

0.23

1.54

278

268

6.4 ± 0.4

9.0 ± 0.5

0.11

0.91

6.3

141

136

6.5 ± 0.5

9.5 ± 0.5

0.45

1.56

118

111

5.8 ± 0.3

9.5 ± 0.5

0.50

2.16

9.1

94

81

5.5 ± 0.3

10 ± 0.5

1.72

2.82

88

75

6.5 ± 0.5

10 ± 0.5

1.82

3.05

  1. “Rs-start” and “Rs-finish” represent the solution resistance at the beginning (t = 0 min) and at the end (t = 20 min) of the potentiostatic tests, respectively.
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