Table 3.
The reported toxic metals in the lower Danube River and other global rivers in µg L−1
| Sampling area/Country | Survey period | Heavy metals | Ref. | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cr | Pb | Cu | Zn | Fe | Ni | As | ||||
| Holbina-Dunavat/RO | 2007 | _ | 42.6 | – | 334 | – | 86 | – | (Burada et al., 2014) | |
| Sontea-Fortuna/RO | _ | 21 | – | 144 | – | 104 | – | |||
| Matita-Merhei/RO | _ | 24 | – | 231 | – | 68 | – | |||
| Somova-Parches/RO | _ | 9.3 | – | 176 | – | 64 | – | |||
| Holbina-Dunavat/RO | 2008 | _ | 48 | – | 249.6 | – | 38 | – | ||
| Sontea-Fortuna/RO | _ | 34.7 | – | 124 | – | 32 | – | |||
| Matita-Merhei/RO | _ | 36 | – | 165 | – | 27 | – | |||
| Somova-Parches/RO | _ | 8 | – | 168 | – | 48 | – | |||
| Holbina-Dunavat/RO | 2009 | _ | 32 | – | 311 | – | 41 | – | ||
| Sontea-Fortuna/RO | _ | 28 | – | 178.9 | – | 88 | – | |||
| Matita-Merhei/RO | _ | 29 | – | 187 | – | 39 | – | |||
| Somova-Parches/RO | _ | 6.8 | – | 128 | – | 36 | – | |||
| Holbina-Dunavat/RO | 2010 | _ | 36 | – | 312 | – | 98 | – | ||
| Sontea-Fortuna/RO | _ | 11 | – | 197 | – | 92 | – | |||
| Matita-Merhei/RO | _ | 23 | – | 182.2 | – | 89 | – | |||
| Somova-Parches/RO | _ | 7 | – | 126 | – | 49 | – | |||
| Holbina-Dunavat/RO | 2011 | _ | 39 | – | 209 | – | 55 | – | ||
| Sontea-Fortuna/RO | _ | 17 | – | 172 | – | 41 | – | |||
| Matita-Merhei/RO | _ | 32 | – | 161 | – | 85 | – | |||
| Somova-Parches/RO | _ | 6.9 | – | 151 | – | 48 | – | |||
| Somova Lake/RO | 2007–2012 Spring | _ | 7.7–11 | – | 161–209.8 | – | 49–78.9 | – | (Burada et al.,) | |
| Rotundu Lake/RO | _ | 6.8–8.9 | – | 124–181 | – | 40–59 | – | |||
| Somova Lake/RO | 2007–2012 Summer | _ | 6.1–7.5 | – | 138–188.7 | – | 41–59 | – | ||
| Rotundu Lake/RO | _ | 6.2–7.2 | – | 100–164 | – | 27.9–46.6 | – | |||
| Somova Lake/RO | 2007–2012 Autumn | _ | 6.8–8.9 | – | 147–179.6 | – | 43–71 | – | ||
| Rotundu Lake/RO | _ | 6.2–7.8 | – | 117.7–179.3 | – | 36–52.8 | – | |||
| Babadag Lake/RO | 2008 | June | _ | 1.6 | – | – | – | 2 | 2 | (Rusu et al., 2014) |
| July | _ | 1.5 | – | – | – | 2.1 | 2.1 | |||
| September | _ | 1.7 | – | – | – | 2.3 | 1.9 | |||
| 2009 | June | _ | 1.5 | – | 1.2 | – | 2.1 | 2.2 | ||
| July | _ | 1.5 | – | 1.3 | – | 2.1 | 2.4 | |||
| September | _ | 1.5 | – | 1.1 | – | 2.3 | 2.3 | |||
| 2010 | June | _ | 1.5 | – | 1.2 | – | 2 | 2.9 | ||
| July | _ | 1.5 | – | 1.3 | – | 2.1 | 2.8 | |||
| September | _ | 1.5 | – | 1.1 | – | 2.3 | 2.7 | |||
| Galati/RO | 2010 | August | _ | 21.4 ± 1.6 | 112.3 ± 3.8 | 47.1 ± 2.0 | – | – | – | (Ioniţă et al., 2014) |
| Tulcea/RO | _ | 14.3 ± 2.5 | 93.5 ± 2.5 | 32.5 ± 1.6 | – | – | – | |||
| Novi Sad/SE | 2011 | June | _ | 0.6 | 6 | 20 | 260 | 1.4 | 1 | (Milošković et al., 2016) |
| Zemun/SE | 2013 | October | _ | 0.5 | 6 | 20 | 210 | 3 | 0.6 | |
| Radujevac/SE | _ | 0.5 | 6 | 9 | 80 | 0.9 | 2 | |||
| Coronini,Caras-Severin/RO | 2010 December–2012 July | _ | _ | 1.46 ± 0.59 | 0.78 ± 0.86 | – | – | – | (Matache et al., 2013) | |
| Bazias/RO | _ | _ | 1.89 ± 0.04 | 1.8 ± 3.49 | – | – | – | |||
| Divici/RO | – | – | 3.17 ± 1.86 | 1.35 ± 1.89 | – | – | – | |||
| Batajnica, Belgrade/SE | 2012 | Autumn | _ | ND | 4 ± 1 | 32 ± 2 | 330 | (Raša et al., 2016) | ||
| Xiangxi River, China | 2021 | _ | 10.59 ± 7.33 | 3.21 ± 0.83 | 2.4 ± 2.61 | 6.2 ± 1.66 | 0.65 ± 0.46 | (Wang et al., 2015) | ||