| Dosage of biosorbent in mg | Mirabilis jalapa | ||
| Cd(II) | Cr(VI) | Pb(II) | |
| % Removal | % Removal | % Removal | |
| 50 | 65 | 63 | 64 |
| 75 | 71 | 69 | 70 |
| 100 | 88 | 85 | 89 |
| 125 | 88 | 85 | 89 |