Table 1 Physical and chemical characteristics of raw soil.
Parameter | Measuring method | Results ± SD |
|---|---|---|
Organic carbon (%co) | Walkley–Block | 2.06 ± 0.62 |
Nitrogen (%N) | Kjeldal | 0.21 ± 0.05 |
Phosphorus (mg/kg) | Olsen | 32.84 ± 4.2 |
Alkalinity (pH) | Digital pH meter | 7.11 ± 1.12 |
Electrical conductivity (ds/m) | EC meter | 1.89 ± 0.28 |
TPHs (mg/kg) | GC‒MS | 861.5 ± 22.3 |
Pb (mg/kg) | ICP‒OES | 6.55 ± 0.78 |
Cr (mg/kg) | ICP‒OES | 16 ± 1.06 |
Ni (mg/kg) | ICP‒OES | 46.5 ± 2.12 |
Cd (mg/kg) | ICP‒OES | 0.33 ± 0.02 |
Soil texture | ||
Clay | Hydrometry | 10.05 ± 2.38 |
Sand | Hydrometry | 62.3 ± 4.51 |
Silt | Hydrometry | 27.65 ± 2.86 |
