Table 2.
Mercury levels in cassava tissues near Bogoso/Prestea gold mine
| Sampling site | Distance (km) | Sample type | Concentration of mercury (μg/kg) | Mean | SD | |||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |||||
| Entrance Of Bogoso Gold Ltd. | 1.5 | Leaves | 176.99 | 146.52 | 127.18 | 145.62 | 149.08 | 20.63 |
| Flesh | 150.28 | 159.81 | 98.51 | 101.19 | 127.45 | 32.12 | ||
| Peel-A | 77.91 | 68.28 | 43.29 | 76.92 | 66.60 | 16.13 | ||
| Peel-B | 82.72 | 85.43 | 76.17 | 58.14 | 75.62 | 12.28 | ||
| Dumasi Site A | 5.5 | Leaves | 153.46 | 125.37 | 147.72 | 127.89 | 138.61 | 14.07 |
| Flesh | 184.78 | 154.61 | 165.97 | 165.31 | 167.67 | 12.54 | ||
| Peel-A | 98.62 | 96.73 | 89.67 | 72.12 | 89.29 | 12.07 | ||
| Peel-B | 101.77 | 102.86 | 97.28 | 91.10 | 98.25 | 5.35 | ||
| River Bogo River Bank | 8.4 | Leaves | 126.71 | 211.79 | 112.33 | 92.37 | 135.80 | 52.58 |
| Flesh | 109.82 | 168.18 | 83.54 | 126.78 | 122.08 | 35.51 | ||
| Peel-A | 110.97 | 92.82 | 125.14 | 92.89 | 105.46 | 15.66 | ||
| Peel-B | 96.76 | 56.99 | 99.13 | 62.13 | 78.75 | 22.28 | ||
| Prestea Ankobra Before Bridge | 14.0 | Leaves | 134.72 | 108.14 | 89.72 | 120.93 | 113.38 | 19.15 |
| Flesh | 175.41 | 169.64 | 126.41 | 136.99 | 152.11 | 24..08 | ||
| Peel-A | 109.26 | 124.21 | 76.30 | 176.54 | 121.58 | 41.75 | ||
| Peel-B | 162.19 | 195.82 | 267.84 | 156.02 | 195.47 | 51.32 | ||