Table 3.
Chemical analysis of drill cuttings (Central and Eastern Poland, 2015–2016)
| Metal contents | Method | C1 | C2 | C3 | C4 | C5 | PL Regulation*) | EC Regulation**) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| I | II | III | IV | Soils; pH = 6–7 | |||||||
| Macroelements | |||||||||||
| Ca (g kg−1) | ICP-OES | 51.7 ± 7.8 | 85.3 ± 12.8 | 95.2 ± 14.3 | 51.1 ± 7.7 | 116.0 ± 17.4 | |||||
| Mg (g kg−1) | ICP-OES | 20.2 ± 3.0 | 18.8 ± 2.8 | 13.0 ± 0.2 | 12.9 ± 1.9 | 8.19 ± 1.2 | |||||
| K (g kg−1) | ICP-OES | 24.0 ± 3.6 | 34.0 ± 5.1 | 27.2 ± 4.1 | 29.1 ± 4.4 | 16.0 ± 2.4 | |||||
| Na (g kg−1) | ICP-OES | – | – | – | – | 3.68 ± 0.6 | |||||
| Microelements | |||||||||||
| Cu (mg kg−1) | ICP-OES | 66.0 ± 9.9 | 64.0 ± 9.6 | 85.0 ± 12.8 | 41.0 ± 6.2 | 53.0 ± 8.0 | 200 | 100–300 | 300 | 600 | 50–140 |
| Co (mg kg−1) | ICP-OES | 27.0 ± 4.1 | 19.0 ± 2.9 | 20.0 ± 3 | 12.0 ± 1.8 | – | |||||
| Fe (g kg−1) | ICP-OES | 36.5 ± 5.5 | 34.7 ± 5.2 | 28.2 ± 4.2 | 34.7 ± 5.2 | 27.3 ± 4.1 | |||||
| Mn (mg kg−1) | ICP-OES | 590.0 ± 88.5 | 410.0 ± 61.5 | 570.0 ± 85.5 | 730.0 ± 109.5 | 470.0 ± 70.5 | |||||
| Zn (mg kg−1) | ICP-OES | 71.0 ± 10.7 | 89.0 ± 13.4 | 160.0 ± 24.0 | 66.0 ± 9.9 | 86.1 ± 12.9 | |||||
| As (mg kg−1) | ICP-OES | – | – | – | – | 8.1 ± 1.2 | 25 | 10–50 | 50 | 100 | |
| Al (g kg−1) | ICP-OES | 62.5 ± 9.4 | 55.6 ± 8.3 | 52.5 ± 7.9 | 60.7 ± 9.1 | 30.6 ± 4.6 | |||||
| Ba (g kg−1) | ICP-OES | 61.6 ± 9.2 | 8.6 ± 1.3 | 58.4 ± 8.8 | 9.2 ± 1.4 | 81.4 ± 16.3***) | 0.4 | 0.2–0.6 | 1.0 | 1.5 | |
| Heavy metals | |||||||||||
| Cr (mg kg−1) | ICP-OES | 82.0 ± 12.3 | 110.0 ± 16.5 | 72.0 ± 10.8 | 81.0 ± 12.2 | 140.0 ± 21.0 | 200 | 150–500 | 500 | 1000 | |
| Cd (mg kg−1) | ICP-OES | < 0.005 | < 0.005 | < 0.005 | < 0.005 | 0.4 ± 0.1 | 2 | 2–5 | 10 | 15 | 1–3 |
| Pb (mg kg−1) | ICP-OES | 45.0 ± 6.75 | 250.0 ± 37.5 | 86.0 ± 12.9 | 42.0 ± 6.3 | 28.1 ± 4.2 | 200 | 100–500 | 500 | 600 | 50–300 |
| Ni (mg kg−1) | ICP-OES | 36.0 ± 5.4 | 35.0 ± 5.3 | 24.0 ± 3.6 | 37.0 ± 5.6 | 70.1 ± 10.5 | 150 | 100–300 | 300 | 500 | 30–75 |
| Hg (mg kg−1) | CV-AAS | – | 0.10 ± 0.02 | 0.50 ± 0.11 | – | 0.77 ± 0.17 | 5 | 2–5 | 10 | 30 | 1–1.5 |
*)Maximum permissible limits of heavy metal contents in soils (depth 0–0.25 m below the ground level) for I–IV class of soil according to the Regulation of the Minister of Environment (Poland), 2016
**)Maximum permissible limits for heavy metal contents in soils, pH = 6–7 according to Directive 86/278/EEC
***)A total Ba content determined by XRD
–Not determined