TABLE 2.
Average values for a selection of physical and chemical parameters during the investigated time period in the water phase and SPM of the Elbe and Spittelwasser Rivers
| Phase | Parameterb (units) | Mean (min, max) value for rivera:
|
|
|---|---|---|---|
| Elbe | Spittelwasser | ||
| Water | pH | 8.0 (7.1, 8.7) | 7.0 (6.6, 7.5) |
| O2 content (mg liter−1) | 10.5 (7.5, 13.0) | 6.3 (3.5, 10.3) | |
| TOC (mg liter−1) | 8 (5.6, 10) | 8.83 (7.16, 10.6) | |
| BOD7 (mg liter O2−1) | 6.5 (2.9, 12.6) | 4.1 (2.4, 7.4) | |
| AOX (μg liter−1) | 37 (30, 49) | 162 (93, 280) | |
| NH4−-N (mg liter−1) | 0.27 (0.01, 0.95) | 2.0 (1.1, 2.9) | |
| NO3−-N (mg liter−1) | 4.6 (3.4, 6.6) | 2.6 (1.9, 3.4) | |
| Total P (mg liter−1) | 0.25 (0.14, 0.36) | 0.14 (0.1, 0.19) | |
| SPM (mg liter−1) | 25 (10, 68) | 6 (4, 9) | |
| SPM | Mercury (mg kg−1) | 4.5 (3.2, 7,6) | 15.3 |
| Lead (mg kg−1) | 149 (121, 173) | 295 | |
| Arsenic (mg kg−1) | 33.6 (25.5, 44) | 149 | |
| γ-HCH (μg kg−1) | 2.5 (0.4, 5.8) | 40 | |
| p,p′-DDT (μg kg−1) | 140 (12, 290) | 1,700 | |
| HCB (μg kg−1) | 198 (30, 360) | 590 | |
| AOX (mg kg−1) | 199 (130, 260) | 480 | |
| Tributyltin (μg kg−1) | 22.8 (18, 30) | 20,000 | |
a
Data were collected every 2 and 8 weeks for water-phase results from the Elbe and Spittelwasser Rivers, respectively. SPM data from the Elbe River were collected monthly, and SPM data from the Spittelwasser River are from 1 month (February to March 1998).
b
BOD, biological oxygen demand; TOC, total organ carbon; HCH, hexachlorohexane.