Table 2.
Statistical analysis of PTE concentrations in Tailings and soil samples at GEG mine (total concentrations in mg kg−1 except for Hg in μg kg−1) as determined by ICP-MS. MDL method detection limit, SD standard deviation, CV SD/mean coefficient of variation, Igeo geoaccumulation index, NA not analyzed
| Al | As | Cd | Co | Cr | Cu | Fe | Hg | Mn | Mo | Ni | Pb | Sb | V | Zn | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MDL | 100 | 0.1 | 0.02 | 0.1 | 0.5 | 0.01 | 100 | 5 | 1 | 0.01 | 0.1 | 0.01 | 0.02 | 2 | 0.1 |
| Mean Tailings, (N=7) | 13114.29 | 25.39 | 0.05 | 189.83 | 26.03 | 472.77 | 120642.86 | 24.86 | 318.57 | 2.20 | 150.29 | 2.64 | 0.16 | 62.57 | 44.53 |
| Median | 12800.00 | 28.40 | 0.05 | 187.20 | 26.00 | 406.01 | 116200.00 | 30.00 | 318.00 | 2.13 | 124.80 | 2.42 | 0.16 | 66.00 | 38.90 |
| Min | 12200.00 | 14.40 | 0.02 | 130.90 | 20.40 | 330.98 | 98100.00 | <MDL | 245.00 | 1.62 | 118.50 | 2.08 | 0.13 | 42.00 | 35.80 |
| Max | 14800.00 | 33.00 | 0.12 | 261.50 | 32.60 | 885.03 | 168200.00 | 37.00 | 374.00 | 2.63 | 278.10 | 3.65 | 0.20 | 77.00 | 77.70 |
| SD | 911.83 | 7.48 | 0.03 | 43.66 | 3.98 | 186.42 | 23190.15 | 0.79 | 42.77 | 0.38 | 58.36 | 0.54 | 0.03 | 13.56 | 14.87 |
| VC | 0.07 | 0.29 | 0.59 | 0.23 | 0.15 | 0.39 | 0.19 | 0.32 | 0.13 | 0.17 | 0.39 | 0.20 | 0.16 | 0.22 | 0.33 |
| Igeo | −1.19 | 0.67 | −2.80 | 3.02 | −1.75 | 3.10 | 1.49 | −1.78 | −1.72 | 1.30 | 0.45 | −3.04 | −1.19 | −0.38 | −1.34 |
| Mean Near, (N= 29) | 20685.19 | 16.00 | 0.16 | 38.50 | 48.07 | 100.84 | 101588.89 | 22.30 | 544.63 | 1.02 | 74.69 | 10.80 | 0.22 | 92.33 | 72.96 |
| Median | 19200.00 | 13.90 | 0.17 | 21.60 | 45.40 | 53.85 | 61200.00 | 26.00 | 538.00 | 0.87 | 73.20 | 11.29 | 0.13 | 79.00 | 64.70 |
| Min | 4200.00 | 9.20 | 0.02 | 11.80 | 14.60 | 17.36 | 21700.00 | <MDL | 189.00 | 0.40 | 28.10 | 2.25 | 0.06 | 33.00 | 28.10 |
| Max | 57100.00 | 35.80 | 0.33 | 137.00 | 126.00 | 386.63 | 400000.00 | 47.00 | 716.00 | 2.93 | 132.60 | 17.42 | 0.71 | 203.00 | 350.90 |
| SD | 10458.44 | 6.59 | 0.08 | 33.76 | 21.61 | 98.35 | 93420.65 | 13.82 | 134.00 | 0.55 | 22.78 | 4.15 | 0.17 | 46.28 | 56.97 |
| VC | 0.51 | 0.41 | 0.48 | 0.88 | 0.45 | 0.98 | 0.92 | 0.62 | 0.25 | 0.54 | 0.30 | 0.38 | 0.80 | 0.50 | 0.78 |
| Igeo | −0.68 | 0.04 | −1.31 | 0.36 | −0.99 | 0.43 | 0.62 | −1.56 | −4.31 | 0.04 | −0.56 | −1.15 | −1.07 | 0.04 | −0.74 |
| Mean Far, (N= 64) | 20253.13 | 11.77 | 0.22 | 16.51 | 53.21 | 38.95 | 33428.13 | 31.45 | 643.84 | 0.73 | 71.56 | 15.07 | 0.21 | 55.38 | 71.91 |
| Median | 18950.00 | 11.55 | 0.21 | 15.75 | 52.65 | 35.99 | 31100.00 | 30.50 | 649.00 | 0.65 | 71.50 | 13.53 | 0.20 | 53.00 | 69.00 |
| Min | 10500.00 | 7.40 | 0.09 | 7.90 | 28.10 | 17.17 | 12500.00 | 4.00 | 378.00 | 0.40 | 36.00 | 5.95 | 0.08 | 29.00 | 35.90 |
| Max | 59400.00 | 19.40 | 0.61 | 30.90 | 104.00 | 83.53 | 72600.00 | 57.00 | 797.00 | 1.59 | 86.70 | 64.68 | 0.87 | 107.00 | 180.70 |
| SD | 6668.55 | 1.99 | 0.07 | 3.68 | 9.31 | 11.04 | 9188.70 | 11.11 | 76.13 | 0.26 | 7.94 | 8.28 | 0.12 | 11.64 | 18.69 |
| VC | 0.33 | 0.17 | 0.33 | 0.22 | 0.17 | 0.28 | 0.27 | 0.35 | 0.12 | 0.36 | 0.11 | 0.55 | 0.60 | 0.21 | 0.26 |
| Igeo | −0.61 | −0.40 | −0.62 | −0.51 | −0.72 | −0.48 | −0.39 | −1.35 | −0.70 | −0.34 | −0.56 | −0.61 | −0.98 | −0.55 | −0.63 |
| Local baseline (N=9) | 19900.00 | 10.20 | 0.22 | 15.30 | 57.80 | 35.01 | 28200.00 | 49.00 | 693.00 | 0.59 | 70.10 | 14.29 | 0.24 | 53.00 | 72.40 |
| World soil averagea | 71000.00 | 4.70 | 1.10 | 6.90 | 42.00 | 14.00 | 35000.00 | 100.00 | 418.00 | 1.18 | 18.00 | 25.00 | 0.48 | 60.00 | 62.00 |
| Fallout dust (N=10) | 15736.29 | 12.63 | 0.04 | 104.10 | 30.43 | 270.45 | 326363.67 | NA | 269.98 | 1.78 | 98.65 | 2.53 | 0.22 | 166.89 | 44.83 |