| Parameters |
Contaminated soil |
Biochars |
Compost |
| Rice husk |
Cashew nut shell |
| pH |
5.7 |
7.4 |
6.3 |
8.7 |
| TOC |
1.8 |
- |
- |
- |
| Sand (%) |
43 |
- |
- |
- |
| Silt (%) |
59 |
- |
- |
- |
| Clay (%) |
9 |
- |
- |
- |
| N (mg/kg) |
600 |
13200 |
23000 |
9600 |
| Ca (mg/kg) |
213 |
9780 |
5340 |
29000 |
| Mg (mg/kg) |
86 |
3530 |
135 |
4540 |
| P (mg/kg) |
71.5 |
197 |
107 |
2090 |
| K (cmol/kg) |
0.46 |
12.4 |
2.8 |
21.9 |
| CEC (cmol/kg) |
4.62 |
110 |
36.9 |
210 |
| Pb (mg/kg) |
18,300 |
0.9 |
1.2 |
1.5 |
|
| -Not available; TOC: Total organic carbon content; CEC: Cation exchange capacity |
| Table 1: Physicochemical parameters of soil, bio chars and compost. |
