Table 1.
Test Organism |
Bacteria Vibrio fischeri |
Crustaceans Daphnia magna |
Algae Raphidocelis subcapitata |
|
Toxicity endpoint, contact time: | Inhibition of luminescence, 30 min | Immobilisation, 48 h | Inhibition of growth, 72 h | |
1 | Magnetite (Fe3O4) | Not toxic (EC50 > 100 mg/L) |
Not toxic (LC50 > 100 mg/L) |
Toxic (EC50 2.2 mg/L) |
2 | HEMA Hydro | Not toxic (EC50 > 100 mg/L) |
Not toxic (LC50 > 100 mg/L) |
Not toxic (EC50 > 100 mg/L) |
3 | Imp.Hydro + Lome |
Not toxic (EC50 > 100 mg/L) |
Not toxic (LC50 > 100 mg/L) |
Not toxic (EC50 > 100 mg/L) |
4 | Imp.Hydro | Not toxic (EC50 > 100 mg/L) |
Not toxic (LC50 > 100 mg/L) |
Not toxic (EC50 > 100 mg/L) |
5 | HydroMAG | Not toxic (EC50 > 100 mg/L) Inhibition at 100 mg/L less than 5% |
Not toxic (EC50 > 100 mg/L) Immobilisation at 100 mg/L–0 |
Harmful (EC50 13.8 mg/L) |
6 | Imp.HydroMAG + Lome | Not toxic (EC50 > 100 mg/L) Inhibition at 100 mg/L less than 5% |
Not toxic (EC50 > 100 mg/L) Immobilisation at 100 mg/L–0 |
Harmful (EC50 30.7 mg/L) |
8 | ZnSO4x7H2O, Alfa Aesar (positive control) |
Toxic EC50 = 5.9 mg Zn/L |
Toxic LC50 = 1.4 mg Zn/L3 |
Extremely toxic EC50 = 0.08 mg Zn/L |
≤0.1 mg/L = extremely toxic to aquatic organisms; >0.1–1 mg/L = very toxic to aquatic organisms; >1–10 mg/L = toxic to aquatic organisms; >10–100 mg/L = harmful to aquatic organisms; and >100 mg/L = non-toxic to aquatic organisms. The evaluation grid applied by Sanderson et al. [36].