Table 1 Content of trace elements in the Kuźnica clarification pond in 2014–2019 compared to threshold values and classification of water quality (Regulation of the Minister of Maritime Economy and Inland Navigation, 2019a).
From: A new charophyte habitat with a stabilized good ecological potential of mine water
Parameter | Range | Mean | ± SD | Threshold valuea | Water quality classa |
|---|---|---|---|---|---|
Ag (µg L−1) | 0.01–0.02 | 0.01 | < 0.01 | 0.005 mg L−1 | I–II |
Al (µg L−1) | 1.14–2.97 | 2.16 | 0.47 | 0.400 mg L−1 | I–II |
As (µg L−1) | 0.01–0.03 | 0.20 | < 0.01 | 0.050 mg L−1 | I–II |
Cd (µg L−1) | 0.01–0.02 | 0.01 | < 0.01 | 0.080 µg L−1 | I–II |
Cu (µg L−1) | 1.52–2.42 | 1.94 | 0.27 | 0.050 mg L−1 | I–II |
Ni (µg L−1) | 2.01–3.01 | 2.55 | 0.34 | 4.000 µg L−1 | I–II |
Pb (µg L−1) | 0.42–1.06 | 0.73 | 0.19 | 1.200 µg L−1 | I–II |
Se (µg L−1) | < 0.01 | < 0.01 | < 0.01 | 0.020 mg L−1 | I–II |
Zn (µg L−1) | 20.01–33.96 | 27.64 | 4.96 | 1.000 mg L−1 | I–II |
Hg (µg L−1) | 0.01–0.02 | 0.01 | < 0.01 | – | – |
Fe* (mg L−1) | 0.32–5.80 | 1.78 | 1.26 | – | – |
Mn (mg L−1) | 0.05–0.51 | 0.25 | 0.11 | – | – |
Si (mg L−1) | 12.48–17.98 | 15.04 | 1.38 | – | – |
