| Ion | Adsorption capacity, mmol/g | Quantitative extraction, mmol/g | Color of complex |
| W(VI) | 5.70 | ˂0.30 | white |
| Mo(VI) | 0.76 | ˂0.30 | pale green |
| Cr(VI) | 0.44 | ˂0.01 | grey-yellow |
| V(V) | 0.70 | ˂0.10 | yellow |
| Co(II) | 0.12 | - | violet |
| Zn((II) | 0.18 | ˂0.02 | white |
| Cu(II) | 0.22 | ˂0.12 | light blue |
| Pb(II) | 0.02 | - | white |
| Cd(II) | 0.11 | - | white |