Heavy metals | Present study (2018) (Toho Lake in Benin) | (Ahémé Lake in Benin) | Porto-Novo lagoon in Benin) | (Pawns’ fresh in Tlemcen |
Cadmium | 7 mg/Kg | - |
| 0.012 mg/kg |
Lead | 60.75 mg/Kg | 26 mg/kg | 5.65 mg/kg | 0.47 mg/kg |
Copper | 2100 mg/kg | - | 0.16 mg/kg | 0.019 mg/kg |
Zinc | 340 mg/Kg | 170 mg/kg | 7 mg/kg | 0.38 mg/kg |