Table 3: Selectivity coefficient, , as a function of soil phase composition in Ca2+→M2+ exchange at 30°C and 60°C in the different soils studied.
(a) Selectivity coefficient, , for soil AD2

AD2

30°C
0.000.000.000.000.000.00
0.3033.050.435.540.460.67
0.4350.890.6114.490.691.05
0.7119.620.7710.080.831.24
0.8610.300.914.140.931.35
1.000.001.000.001.000.00

60°C
0.000.000.000.000.000.00
0.3223.060.425.720.460.65
0.4244.260.5717.880.682.03
0.7312.840.769.600.831.67
0.877.200.913.770.922.21
1.000.001.000.001.000.00

(b) Selectivity coefficient, , for soil AD3

AD3

30°C
0.000.000.000.000.000.00
0.18127.480.4013.370.437.57
0.24196.050.6215.830.6119.80
0.31219.090.7614.440.7713.70
0.7341.830.8810.820.8910.75
1.000.001.000.001.000.00

60°C
0.000.000.000.000.000.00
0.14356.000.3824.530.452.56
0.31241.900.5833.680.649.30
0.55112.830.7328.500.7517.58
0.7944.300.8813.120.907.22
1.000.001.000.001.000.00

(c) Selectivity coefficient, , for soil NB

NB

30°C
0.000.000.000.000.000.00
0.3424.060.426.030.460.18
0.4839.500.657.230.690.53
0.6824.710.797.650.831.03
0.888.500.922.640.931.00
1.000.001.000.001.000.00

60°C
0.000.000.000.000.000.00
0.3617.640.418.440.460.13
0.5128.850.6112.840.691.78
0.7216.820.7511.840.831.39
0.887.220.913.680.931.23
1.000.001.000.001.000.00