Table 4 Mean free adsorption energies of ions adsorbed in soil colloid particles with four soil types at field strength of 100, 150, 200, 250 kV cm⁻¹

1.18

2.09

3.14

3.84

0.57

1.33

2.17

2.93

0.49

1.17

2.22

2.93

0.09

0.64

1.35

2.03

0.00

0.23

0.77

1.25

0.70

1.34

2.20

2.84

0.60

1.20

1.96

2.61

0.26

0.82

1.51

2.15

0.82

1.48

2.37

3.01

− 0.04

0.08

0.53

0.85

1.33

2.22

3.23

3.91

0.51

1.34

2.27

2.92

0.06

0.78

1.59

2.20

1.50

2.42

3.45

4.12

− 0.28

0.48

1.28

2.02

0.79

1.43

2.31

2.97

0.46

1.01

1.80

2.50

0.35

0.89

1.64

2.21

0.74

1.44

2.31

2.97

− 0.14

0.56

1.32

2.05