Table 8.
Bio-concentration (mg/kg) of some potentially toxic elements in popcorn kernel
| MSWC Rate (t/ha) | As | Pb | Ni | Co | Al | Cr | Cd |
|---|---|---|---|---|---|---|---|
| Control (0) | 0.19 | 9.97 × 10–8 | 10.64 | 0.21 | 1.19 | 4.18 | ND |
| 4 | 0.15 | 7.25 × 10–8 | 9.51 | 0.20 | 0.89 | 3.88 | ND |
| 8 | 0.11 | 6.25 × 10–8 | 8.94 | 0.19 | 0.74 | 3.34 | ND |
| Mean | 0.15 | 7.82 × 10–8 | 9.70 | 0.20 | 0.94 | 3.80 | ND |
| LSD (p < 0.05) | 2.08 × 10–4 | 1.89 × 10–8 | 0.59 | 1.189 × 10–2 | 0.174 | 0.256 | – |
| F-value | 1.01 × 10–7** | 0.017* | 0.006** | 0.017* | 0.008** | 0.004** | – |
| FAO/WHO (mg/kg) | 0.20 | 0.20 | 2.70 | 0.48 | 1.00 | 2.30 | 0.20 |
MSWC Municipal solid waste compost, LSD Least significant difference at p ≤ 0.05, ND not detected
*Significant at 0.01
**Significant at 0.001
***Significant at 0.0001