Table 2.
Mean element concentration in sediment samples and extracts
| Buk 2-pond | Buk 3-pond | |||||||
|---|---|---|---|---|---|---|---|---|
| HAc | H2O2 − [Sq] | H2O2 − [S] | Total | HAc | H2O2 − [Sq] | H2O2 − [S] | Total | |
| As | 3.0 ± 0.2 | 0.21 ± 0.03 | 0.22 ± 0.08 | 22 ± 2 | 48 ± 2 | 0.84 ± 0.09 | 1.2 ± 0.03 | 320 ± 8 |
| Cd | 1.2 ± 0.3 | 0.17 ± 0.04 | 0.83 ± 0.07 | 1.5 ± 0.3 | 8.4 ± 0.7 | 90 ± 3 | 65 ± 2 | 110 ± 4 |
| Co | 1.3 ± 0.3 | 0.24 ± 0.09 | 0.82 ± 0.21 | 5.0 ± 3 | 2.4 ± 0.8 | 1.0 ± 0.4 | 3.1 ± 1.8 | 3.0 ± 2.1 |
| Cr | 1.3 ± 0.5 | 0.7 ± 0.2 | 0.7 ± 0.2 | 12.5 ± 0.5 | 1.5 ± 0.3 | 7.0 ± 3.0 | 8.4 ± 0.5 | 48 ± 1 |
| Cu | 64 ± 4 | 29 ± 1 | 15 ± 1 | 155 ± 43 | 2.6 ± 0.3 | 25 ± 1 | 28 ± 2 | 45 ± 5 |
| Mn | 129 ± 10 | 25 ± 3 | 113 ± 21 | 320 ± 26 | 760 ± 31 | 91 ± 4 | 608 ± 28 | 900 ± 32 |
| Mo | 0.13 ± 0.04 | 0.19 ± 0.06 | 0.20 ± 0.04 | 5.0 ± 0.2 | 0.17 ± 0.03 | 1.0 ± 0.2 | 0.63 ± 0.02 | 5.0 ± 0.4 |
| Pb | 357 ± 19 | 39 ± 2 | 37 ± 3 | 440 ± 37 | 1,491 ± 67 | 684 ± 30 | 48 ± 6 | 5,070 ± 260 |
| Tl | 0.14 ± 0.03 | 0.05 ± 0.02 | 0.12 ± 0.02 | 0.33 ± 0.05 | 1.2 ± 0.1 | 3.1 ± 0.1 | 4.0 ± 0.2 | 14 ± 3 |
| Zn | 1,106 ± 95 | 267 ± 10 | 593 ± 22 | 1,110 ± 110 | 15,110 ± 917 | 7,387 ± 188 | 10,332 ± 230 | 29,700 ± 210 |
Buk 2 and Buk 3 ponds correspond to the water reservoirs sampled in the study area of Bukowno–Bolesław (Southern Poland). Extractions were carried out with 30 % H2O2, alone as well as in sequence with 0.43 mol L−l CH3COOH
[Sq]: extraction in sequence scheme; [S]: single extraction. Data are presented in mg kg−1 dry weight, as mean (n = 4) and standard deviations in parentheses