Table 1.
Activity concentrations of 238U, 232Th and 40K for soil samples from the mine tailings and from the control area.
| Location | No. of Samples | Parameter | Activity Concentrations (Bq∙kg−1) | ||
|---|---|---|---|---|---|
| 238U | 232Th | 40K | |||
| Control area | 10 | Average ± Error | 17.0 ± 0.4 | 22.2 ± 0.5 | 496.8 ± 15.2 |
| Min ± Error | 12.5 ± 0.3 | 16.6 ± 0.4 | 424.3 ± 13.0 | ||
| Max ± Error | 23.6 ± 0.5 | 30.4 ± 0.6 | 648.4 ± 19.8 | ||
| Tailings one | 11 | Average ± Error | 733.4 ± 12.7 | 41.3 ± 0.9 | 339.9 ± 10.7 |
| Min ± Error | 304.4 ± 5.4 | 36.5 ± 0.8 | 271.5 ± 9.0 | ||
| Max ± Error | 1243.4 ± 21.6 | 54.5 ± 1.2 | 468.4 ± 14.6 | ||
| Tailings two | 13 | Average ± Error | 794.9 ± 13.8 | 44.9 ± 1.0 | 460.7 ±14.4 |
| Min ± Error | 616.6 ± 10.7 | 38.4 ± 0.9 | 226.5 ±7.8 | ||
| Max ± Error | 1391.8 ± 24.1 | 49.5 ± 1.1 | 681.9 ± 21.0 | ||
| Tailings three | 8 | Average ± Error | 1556.2 ± 27.0 | 59.0 ± 1.3 | 354.3 ± 11.4 |
| Min ± Error | 390.9 ± 6.8 | 22.3 ± 0.6 | 233.8 ± 7.5 | ||
| Max ± Error | 2668.9 ± 46.2 | 89.7 ± 1.9 | 497.1 ± 15.6 | ||
| Tailings four | 12 | Average ± Error | 232.0 ± 4.1 | 33.2 ± 0.8 | 489.5 ± 14.1 |
| Min ± Error | 87.2 ± 1.6 | 20.5 ± 0.6 | 257.9 ± 8.3 | ||
| Max ± Error | 618.2 ± 10.8 | 49.1 ± 1.1 | 781.0 ± 23.9 | ||
| Tailings five | 12 | Average ± Error | 609.7 ± 10.6 | 41.1 ± 0.9 | 490.7 ± 15.2 |
| Min ± Error | 236.1 ± 4.2 | 25.3 ± 0.6 | 281.2 ± 8.8 | ||
| Max ± Error | 2054.7 ± 35.6 | 67.1 ± 1.4 | 574.9 ± 17.7 | ||
| Average all tailings | 485.3 ± 13.7 | 43.9 ± 1.0 | 427.0 ± 13.1 | ||