Table 2.
Physicochemical properties of raw leachates from landfills in Bielawa and Legnica, studies conducted in 2018–2020.
| Landfill | Unit | Bielawa | Legnica | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Raw Leachate | After Biological Treatment | Raw Leachate | After Biological Treatment | ||||||||
| Pollution Indicators | Min. | Max. | June 2020 | P. australis | C. demersum | min. | Max. | June 2020 | P. australis | C. demersum | |
| pH | - | 7.8 | 9.1 | 8.4 | 9.1 | 9.4 | 8.0 | 8.9 | 8.8 | 9.1 | 9.5 |
| EC | μS/cm | 3048.0 | 5075.0 | 2318.0 | 2340.0 | 2419.0 | 8417.0 | 11370.0 | 7791.0 | 8109.0 | 8503.0 |
| COD | mg O2/dm3 | 954.0 | 4270.0 | 321.8 | 154.0 | 198.8 | 1585.0 | 3800.0 | 2007.0 | 1577.0 | 1520.8 |
| TKN | mg N/dm3 | 32.2 | 294.5 | 51.1 | 6.2 | 11.9 | 167.6 | 907.4 | 269.9 | 30.4 | 58.2 |
| ON | mg Norg/dm3 | 14.6 | 182.8 | 22.7 | 6.0 | 11.9 | 4.5 | 121.3 | 81.7 | 6.8 | 58.2 |
| AN | mg NNH4/dm3 | 17.6 | 231.2 | 28.4 | 0.2 | 0.0 | 66.1 | 786.1 | 188.2 | 23.6 | 0.0 |
| TS | mg/dm3 | 2580.0 | 8745.0 | 2045.0 | 2028.0 | 2196.0 | 6210.0 | 8245.0 | 7395.0 | 7669.0 | 8545.0 |
| TDS | mg/dm3 | 2140.0 | 3050.0 | 1920.0 | 1864.0 | 2178.0 | 6195.0 | 7830.0 | 7065.0 | 7613.0 | 7697.0 |
| TSS | mg/dm3 | 105.0 | 5995.0 | 125.0 | 23.0 | 639.0 | 15.0 | 1870.0 | 330.0 | 168.0 | 320.0 |
| Sulfates | mg SO4/dm3 | 139.1 | 1884.0 | 1481.0 | 268.2 | 207.3 | 80.6 | 396.6 | 261.6 | 477.2 | 419.6 |
| Chlorides | mg Cl/dm3 | 5.5 | 765.0 | 303.0 | 670.0 | 468.0 | 22.0 | 2811.0 | 2160.0 | 2330.0 | 2920.0 |
| Sodium | mg Na/dm3 | 132.3 | 285.8 | 151.8 | 162.9 | 307.5 | 175.2 | 329.2 | 177.8 | 809.5 | 876.5 |
| Potassium | mg K/dm3 | 188.8 | 265.6 | 256.2 | 207.4 | 368.5 | 238.2 | 317.2 | 507.6 | 997.0 | 1025.0 |
| Calcium | mg Ca/dm3 | 69.5 | 194.3 | 150.3 | 188.5 | 60.9 | 43.9 | 113.8 | 68.1 | 113.1 | 91.1 |
| Magnese | mg Mg/dm3 | 61.3 | 133.4 | 79.3 | 72.3 | 67.0 | 70.2 | 133.8 | 87.9 | 90.6 | 92.1 |
| Iron | mg Fe/dm3 | 1.6 | 18.0 | 0.5 | 0.2 | 0.2 | 2.6 | 10.6 | 2.2 | 2.1 | 1.1 |
| Manganese | mg Mn/dm3 | 0.1 | 2.4 | 0.4 | 0.1 | 0.1 | 0.2 | 0.6 | 0.5 | 0.5 | 0.5 |
| Copper | mg Cu/dm3 | 0.0 | 4.7 | 0.0 | 0.0 | 0.0 | 0.1 | 4.0 | 0.1 | 0.1 | 0.1 |
| Zinc | mg Zn/dm3 | 0.3 | 1.6 | 0.2 | 0.2 | 0.2 | 0.1 | 2.0 | 0.5 | 0.3 | 0.8 |
| Chromium | mg Cr/dm3 | 0.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 0.2 | 0.0 | 0.2 |
| Lead | mg Pb/dm3 | 0.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.1 | 0.0 | 0.1 |
| Nickel | mg Ni/dm3 | 0.0 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.4 | 0.2 | 0.1 | 0.2 |
| Cadmium | mg Cd/dm3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |