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Table 3
The radionuclide activity distribution for RER7009/18 02-04 multicorer sediment slices with increasing depth.
| Sediment slice | Core sample code RER7009/18 02-04a | The measured activity concentrations (Bq · kg−1) | ||||
|---|---|---|---|---|---|---|
| No. | Slice thickness (from top to bottom) | 210Pb | 226Ra | 232Th | 137Cs | 40K |
| 1 | 0–1 cm | 65 ± 10 | 38 ± 4 | 26.7 ± 3.2 | 12.3 ± 0.7 | 409 ± 14 |
| 2 | 1–2 cm | 81 ± 12 | 34 ± 5 | 24.8 ± 3.6 | 12.4 ± 0.8 | 424 ± 16 |
| 3 | 2–3 cm | 92 ± 11 | 37 ± 3 | 24.3 ± 2.3 | 18.2 ± 0.7 | 444 ± 13 |
| 4 | 3–4 cm | 82 ± 12 | 40 ± 4 | 28.0 ± 3.6 | 15.4 ± 0.9 | 426 ± 15 |
| 5 | 4–5 cm | 62 ± 8 | 37 ± 3 | 26.3 ± 2.6 | 13.4 ± 0.6 | 410 ± 12 |
| 6 | 5–6 cm | 79 ± 13 | 37 ± 5 | 29.4 ± 3.8 | 12.5 ± 0.8 | 411 ± 15 |
| 7 | 6–7 cm | 73 ± 10 | 36 ± 4 | 26.0 ± 3.3 | 15.0 ± 0.8 | 412 ± 14 |
| 8 | 7–8 cm | 74 ± 10 | 34 ± 4 | 27.9 ± 2.8 | 13.9 ± 0.7 | 422 ± 13 |
| 9 | 8–9 cm | 58 ± 10 | 38 ± 5 | 24.6 ± 3.4 | 13.5 ± 0.8 | 396 ± 15 |
| 10 | 9–10 cm | 73 ± 10 | 39 ± 4 | 24.5 ± 2.6 | 13.8 ± 0.7 | 399 ± 12 |
| 11 | 10–11 cm | 76 ± 11 | 37 ± 4 | 26.4 ± 3.3 | 15.3 ± 0.8 | 423 ± 14 |
| 12 | 11–12 cm | 89 ± 13 | 33 ± 5 | 24.6 ± 3.7 | 14.9 ± 0.9 | 445 ± 17 |
| 13 | 12–13 cm | 70 ± 9 | 37 ± 4 | 25.7 ± 2.7 | 14.8 ± 0.7 | 396 ± 12 |
| 14 | 13–14 cm | 61 ± 9 | 36 ± 4 | 25.7 ± 2.9 | 13.7 ± 0.7 | 404 ± 13 |
| 15 | 14–15 cm | 66 ± 10 | 33 ± 5 | 25.5 ± 3.6 | 12.8 ± 0.8 | 392 ± 15 |
| 16 | 15–16 cm | 61 ± 8 | 33 ± 3 | 25.7 ± 2.5 | 11.6 ± 0.5 | 403 ± 12 |
| 17 | 16–17 cm | 62 ± 9 | 37 ± 4 | 25.2 ± 3.2 | 12.3 ± 0.7 | 440 ± 15 |
| 18 | 17–18 cm | 53 ± 10 | 37 ± 4 | 23.1 ± 3.1 | 9.5 ± 0.7 | 393 ± 14 |
| 19 | 18–19 cm | 56 ± 8 | 36 ± 3 | 23.0 ± 2.4 | 10.5 ± 0.5 | 379 ± 12 |
| 20 | 19–20 cm | 48 ± 8 | 37 ± 4 | 26.4 ± 3.0 | 10.6 ± 0.6 | 380 ± 13 |
| 21 | 20–21 cm | 59 ± 9 | 35 ± 4 | 23.8 ± 3.2 | 11.6 ± 0.7 | 386 ± 14 |
| 22 | 21–22 cm | 50 ± 7 | 35 ± 4 | 24.5 ± 2.6 | 12.3 ± 0.6 | 396 ± 12 |
| 23 | 22–23 cm | 59 ± 8 | 35 ± 3 | 24.0 ± 2.4 | 10.6 ± 0.5 | 387 ± 11 |
| 24 | 23–24 cm | 52 ± 7 | 34 ± 3 | 24.5 ± 2.3 | 9.6 ± 0.5 | 372 ± 9 |
| 25 | 24–25 cm | 51 ± 7 | 35 ± 3 | 24.4 ± 2.5 | 9.0 ± 0.5 | 366 ± 9 |
| 26 | 25–26 cm | 46 ± 6 | 37 ± 3 | 25.4 ± 2.6 | 8.2 ± 0.5 | 391 ± 10 |
| 27 | 26–27 cm | 47 ± 6 | 35 ± 3 | 25.7 ± 2.4 | 10.2 ± 0.5 | 389 ± 9 |
| Average | 65 ± 9 | 36 ± 4 | 25.4 ± 3.0 | 12.5 ± 0.7 | 403 ± 13 | |
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