Lead and Chromium Immobilization Process Subjected to Different Freeze-Thaw Treatments in Soils of the Northeastern Qinghai-Tibet Plateau
Table 4
Pseudo-first-order and Weber–Morris parameters of Cr in soils under different freeze-thaw conditions.
Site area
FTCs
Cr (pseudo-first-order kinetics)
Cr (Weber–Morris)
k
C
k
S-1
F0 + W0%
—
—
—
11.77 ± 0.35
0.06 ± 0.23
0.02
F15 + W60%
17.21 ± 1.10
12.19 ± 3.92
0.59
12.34692 ± 0.87042
2.87 ± 0.57
0.86
F15 + W100%
12.75 ± 0.44
12.71 ± 2.27
0.79
10.08 ± 0.78
1.41 ± 0.52
0.64
S-2
F0 + W0%
25.64 ± 0.51
20.82 ± 3.08
0.76
23.58 ± 1.30
0.97 ± 0.86
0.24
F15 + W60%
—
—
—
24.39 ± 3.45
−5.21 ± 2.28
0.56
F15 + W100%
—
—
—
18.26 ± 1.81
−3.35 ± 1.19
0.66
S-3
F0 + W0%
37.63 ± 1.84
15.42 ± 4.33
0.67
32.54 ± 4.10
2.32 ± 2.71
0.15
F15 + W60%
50.45 ± 3.93
7.16 ± 2.41
0.77217
30.47 ± 7.16
10.28 ± 4.73
0.54
F15 + W100%
55.03 ± 2.98
12.31 ± 3.35
0.67056
40.54 ± 3.14
8.33 ± 2.07
0.80
S-4
F0 + W0%
24.80 ± 3.26
10.75 ± 6.74
0.33883
—
—
—
F15 + W60%
28.20 ± 1.52
59.07 ± 220.48
0.001
27.34 ± 2.23
0.68 ± 1.47
0.05
F15 + W100%
27.50 ± 1.55
35.73 ± 32.36
0.0172
0.78 ± 1.47
26.30 ± 2.23
0.06
S-5
F0 + W0%
25.21 ± 1.60
3.36 ± 0.82
0.91004
12.08 ± 3.98
5.72 ± 2.63
0.54
F15 + W60%
32.00 ± 1.96
11.48 ± 3.45
0.66061
23.50 ± 2.86
4.69 ± 1.89
0.60
F15 + W100%
36.29 ± 1.91
18.04 ± 6.11
0.42226
29.72 ± 1.65
4.10 ± 1.09
0.77
S-6
F0 + W0%
35.72 ± 2.92
11.36 ± 4.52
0.48214
24.06 ± 1.18
7.06 ± 0.78
0.95311
F15 + W60%
40.61 ± 1.56
22.07 ± 6.64
0.35317
37.35 ± 2.46
1.68 ± 1.62
0.21163
F15 + W100%
37.18 ± 1.17
15.77 ± 2.89
0.77708
30.81 ± 2.16
3.52 ± 1.42
0.60374
Note. “—” means that these data could not be fitted using the pseudo-first-order and Weber–Morris models. 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).
