Table 7: Mean soil heavy metals and metalloid concentrations.
Site | Treatment Adubriem | Treatment T1 | Treatment Nhyiaeso | Treatment Sansu | Treatment T3 | Control, San, Nhy, T1 | Control Adubriem | Control T3 | Dutch IL | Dutch IVL |
Type of Site | Pit | Pit | Pit | WRF | Pit | Pit | Pit | |||
Sample count | 2 | 2 | 2 | 1 | 3 | 1 | 1 | 1 | ||
Parameter | ||||||||||
As | 343 | 736 | 529 | 353 | 111 | 167 | 74 | 50 | 29 | 55 |
Cd | 0.1 | 0.06 | 0.1 | 0.03 | 0.03 | 0.1 | 0.03 | 0.03 | 1 | 12 |
Co | 6.8 | 19.8 | 6.3 | 9.4 | 2.5 | 4.2 | 3.2 | 2.1 | 9 | 240 |
Cr | 126 | 62 | 88 | 100 | 106 | 159 | 204 | 174 | 100 | 340 |
Cu | 44 | 42 | 22 | 72 | 20 | 21 | 20 | 12 | 36 | 190 |
Hg | 0.05 | 0.02 | 0.04 | 0.04 | 0.05 | 0.17 | 0.06 | 0.04 | 0.3 | 10 |
All measurements in mg/kg; San = Sansu; Nhy = Nhyiaeso; WRF = Waste rock facility.