Table 3: Half inhibition concentration of heavy metals on Anammox bacteria.
| Heavy Metal ions | Half Inhibition Concentration, IC50 (mg/L) | References |
| Cadmium, Cd2+ | 11.2 | Zhen Bi, et al. [27] |
| Copper, Cu2+ | 1.9-30 | Yang, et al.; Yang, et al. [9,39] |
| Lead, Pb2+ | NT | Li, et al. [55] |
| Mercury, Hg2+ | 60.35 | Zhen Bi, et al. [27] |
| Molybdate, MoO42+ | NT | Li, et al. [55] |
| Nickel, Ni2+ | 48.6 | Li, et al. [55] |
| Silver, Ag+ | 11.52 | Zhen Bi, et al. [27] |
| Zinc, Zn2+ | 3.9-25 | Achlesh, et al.; Li, et al. [37,55] |
| Fe (II), Fe2+ | 55.6 (0.20 mM) | Mak, et al. [36] |
NT = was not toxic at the highest concentration tested (75 mg Pb/L and 23.8 mg Mo/L).