Table 7 Hg distribution under different DOM concentration
Initial experimental parameters | |||||
DOM conc. (mg C L−1) | 0.25 | 0.5 | 2 | 10 | 20 |
Hg conc. (μg L−1) | 18.0 | 12.4 | 12.1 | 13.9 | 15.9 |
pH | 6.73 | 6.94 | 6.87 | 6.86 | 6.94 |
Dissolved O2 (mg L−1) | 4.33 | 3.71 | 3.65 | 3.67 | 3.13 |
Hg partition after reaching equilibrium | |||||
Dissolved Hg (%) | 45.1 | 57.8 | 61.4 | 68.4 | 75.7 |
Hg in AC (%) | 61.5 | 49.3 | 49.1 | 26.9 | 14.7 |
Particulate Hg (%) | 3.1 | 4.6 | 3.2 | 2.5 | 2.1 |