Table 3 The equilibrium results of Hg adsorption in the presence of chloride, sulfide, or DOM
Hg + Cl | Hg + sulfide | Hg + DOM | |
|---|---|---|---|
Initial experimental parameters | |||
Hg conc. (μg L− 1) | 16.2 | 18.6 | 20.4 |
Factor conc. | 200 mM | 10 μM | 2 mg C L− 1 |
pH | 6.86 | 6.76 | 6.96 |
Dissolved O2 (mg L− 1) | 4.13 | 4.33 | 4.33 |
Contact time (min) | 0–2880 | 0–1440 | 0–2880 |
After reaching equilibrium | |||
Residual dissolved THg (μg L− 1) | 1.84 | 3.34 | 9.99 |
THg removal (%) | 89 | 82 | 51 |
Adsorption capacity (μg g− 1) | 14.3 | 15.3 | 10.4 |