Lead and Chromium Immobilization Process Subjected to Different Freeze-Thaw Treatments in Soils of the Northeastern Qinghai-Tibet Plateau
Table 3
Pseudo-first-order and Weber–Morris parameters of Pb in soils under different freeze-thaw conditions.
Site area
FTCs
Pb (pseudo-first-order kinetics)
Pb (Weber–Morris)
k
C
k
S-1
F0 + W0%
22.95 ± 13.13
0.19 ± 0.21
0.72
1.13 ± 1.49355
5.69 ± 0.98
0.89
F15 + W60%
20.46 ± 2.96
1.08 ± 0.49
0.84
1.28 ± 2.49
8.27 ± 1.64
0.86
F15 + W100%
25.41 ± 2.76
1.27 ± 0.43
0.84
5.36 ± 1.75
8.48 ± 1.15
0.93
S-2
F0 + W0%
41.05 ± 7.4
1.69 ± 0.99
0.52
12.11 ± 3.43
13.07 ± 2.26
0.89
F15 + W60%
28.35 ± 5.17
1.42048 ± 0.82
0.72
3.69 ± 3.71
11.37 ± 2.45
0.84
F15 + W100%
35.53 ± 4.69
1.05 ± 0.43
0.85
3.29 ± 3.37
13.77 ± 2.22
0.90
S-3
F0 + W0%
45.79 ± 4.73
2.55 ± 0.95
0.76
19.26 ± 5.02
11.72 ± 3.31
0.75
F15 + W60%
48.96 ± 2.22
11.84 ± 2.66
0.76
37.38 ± 4.05
6.15 ± 2.67
0.56
F15 + W100%
51.23 ± 4.15
9.22 ± 3.39
0.56
33.61 ± 3.59
9.94 ± 2.37
0.81
S-4
F0 + W0%
6.78 ± 0.35
3.34 ± 0.66
0.94
2.95 ± 1.10
1.72 ± 0.73
0.58
F15 + W60%
21.35 ± 2.53
7.49 ± 3.86
0.65
14.97 ± 5.27
2.53 ± 3.48
0.11
F15 + W100%
21.00 ± 0.95
13.72 ± 3.32
0.74
18.88 ± 2.54
0.51 ± 1.68
0.02
S-5
F0 + W0%
67.23 ± 7.16
1.00 ± 0.33
0.91
4.51 ± 8.82
26.12 ± 5.82
0.83
F15 + W60%
53.46 ± 2.37
12.57 ± 2.84
0.78
43.57 ± 6.10
4.61 ± 4.03
0.24
F15 + W100%
60.90 ± 3.66
12.54 ± 3.83
0.61
44.71 ± 3.62
9.44 ± 2.39
0.79
S-6
F0 + W0%
23.95 ± 3.45
4.01 ± 2.32
0.46
12.03 ± 3.03
5.88 ± 2.00
0.68
F15 + W60%
25.21 ± 2.19
6.34 ± 2.34
0.69
14.38 ± 2.53
5.70 ± 1.67
0.74
F15 + W100%
26.94 ± 2.60
1.79 ± 0.57
0.83
8.76 ± 2.00
7.82 ± 1.32
0.89
Note. F0 and F15 refer to the number of freeze-thaw cycles (0 and 15 cycles), and W0%, W60%, and W100% refer to water ratio of field capacity (0%, 60%, and 100% water ratio).
