| pH (medium) | Adsorption, % | ||||
| W(VI) | Mo(VI) | K2Cr2O7 | (NH4)2Cr2O7 | V(V) | |
| 1.0 (hyrochloric acid) | 100 | 75 | 89 | 89 | 53 |
| 1.7 (oxalate buffer) | - | 82 | 99 | 100 | 77 |
| 4.0 (phthalate buffer) | 100 | 100 | 28 | 31 | 100 |
| 6.9 (phosphate buffer) | - | 0 | 0 | 82 | 77 |
| (distilled water) | 48 | 86 | 0 | 0 | 17 |
| 8.0 (ammonium-acetate buffer) | 44 | 94 | 0 | 0 | 77 |