Table 6.
The comparison of heavy metal content in aerial parts of different plants from the area of Iława Główna railway junction in 1995 and 2008 (milligrams per kilogram dry weight)
| Heavy metal | Siding | Loading | Platform | Cleaning bay | Control | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995 | 2008 | 1995 | 2008 | 1995 | 2008 | 1995 | 2008 | 1995 | 2008 | ||||
| Taraxacum sp. | Daucus carota | Pastinaca sativa | Sonchus oleraceus | Taraxacum officinale | Sonchus oleraceus | Taraxacum officinale | Taraxacum officinale | Taraxacum officinale | Taraxacum officinale | Daucus carota | Taraxacum officinale | Taraxacum officinale | |
| Lead | 43 | 13.39 | 7.49 | 11.69 | 22 | 13.41 | 28 | 19.44 | 56 | 14.97 | 11.29 | 18 | nd |
| Cadmium | 1 | 0.73 | 0.32 | 0.73 | 1 | 1 | 1 | 0.85 | 1 | 1 | 1.18 | nd | nd |
| Copper | 49 | 22.12 | 18.92 | 22.94 | 55 | 29.04 | 98 | 123.19 | 52 | 53.88 | 46.89 | 21 | nd |
| Zinc | 255 | 100 | 85 | 122 | 190 | 224 | 162 | 102 | 480 | 158 | 192 | 88 | nd |
| Mercury | 0.06 | 0.03 | 0.03 | 0.03 | 0.07 | 0.03 | 0.07 | 0.03 | 1.94 | 0.12 | 0.05 | 0.02 | nd |
| Iron | 380 | 4,695 | 29,885 | 3,528 | 290 | 2,075 | 320 | 18,819 | 430 | 5,274 | 5,119 | 210 | nd |
| Cobalt | 3 | 0.89 | 0.55 | 0.64 | 3 | 0.69 | 4 | 2.65 | 3 | 0.91 | 0.81 | 2 | nd |
| Chromium | 107 | 19 | 36 | 20 | 89 | 35 | 87 | 57 | 66 | 26 | 25 | 65 | nd |
| Molybdenum | 1.8 | 2.25 | 2.07 | 2.14 | 1.5 | 0.97 | 2.5 | 2.01 | 1.5 | 4.53 | 1.61 | 1.5 | nd |