| Average concentrations Сr, mg/l | Chemical runoff Pr, ton/year | |
Selenga | Other tributaries | ||
Major ions | |||
Na+ | 5800 | 3600 | 276 × 103 |
| 17,000 | 6000 | 673 × 103 |
Cl− | 2200 | 780 | 87 × 103 |
Trace elements | |||
Al | 36 | 40 | 2244 |
Cr | 0.22 | 0.5 | 21 |
Mn | 3.3 | 7 | 306 |
Fe | 22 | 70 | 2 740 |
Co | 0.05 | 0.05 | 3,0 |
Cu | 0.64 | 1.7 | 70 |
Zn | 6.2 | 4.3 | 309 |
Mo | 0.8 | 1.7 | 74 |
Pb | 0.21 | 1.0 | 36 |