Table 3: Extractable heavy metal concentration of diesel contaminated soils.
|
|
|
Total Heavy metals (mgkg-1) |
|
||
|
Amendment |
|
Cd |
Ni2+ |
||
|
|
|
Range |
Mean |
Range |
Mean |
|
C |
|
0.12-0.15 |
0.12 ± 0.01 |
4.00-4.15 |
4.06 ± 0.08 |
|
|
|
|
|
|
|
|
CD |
W1 |
0.15-0.23 |
0.19 ± 0.04 |
1.10-4.48 |
2.79 ± 1.69 |
|
|
W2 |
0.14-0.17 |
0.15 ± 0.02 |
0.34-1.02 |
0.68 ± 0.34 |
|
|
W3 |
0.11-0.32 |
0.22 ± 0.10 |
0.53-7.34 |
3.94 ± 3.41 |
|
|
|
|
|
|
|
|
WC |
W1 |
0.16-0.33 |
0.24 ± 0.08 |
7.01-9.06 |
8.04 ± 1.03 |
|
|
W2 |
0.13-0.26 |
0.19 ± 0.06 |
7.05-9.66 |
8.36 ± 1.31 |
|
|
W3 |
0.17-0.18 |
0.18 ± 0.01 |
7.98-8.35 |
8.16 ± 0.19 |
|
|
|
|
|
|
|
|
WCD |
W1 |
0.08-0.15 |
0.12 ± 0.04 |
1.57-1.68 |
1.62 ± 0.05 |
|
|
W2 |
0.07-0.24 |
0.16 ± 0.08 |
0.09-7.66 |
5.12 ± 4.36 |
|
|
W3 |
0.12-0.18 |
0.12 ± 0.01 |
0.74-1.34 |
0.97 ± 0.33 |
C: Control Soil; CD: Cattle Dung Char; WC: Wood Char; WCD: Wood + Cattle Dung Char; W1 = 150 g; W2 = 300 g; W3 = 450 g; Mean ± Standard Deviation; n = 3; Means with different letter = significantly different at p < 0.05