| Physical properties | Titanic sand | Attapulgite |
| pH | 6.4 | 8.21 |
| pHpzc | 8.75 | 8.75 |
| Absolute density (kg/m3) | 4054 | 1660 |
| Bulk density (kg/m3) | 2500 | 455 |
| Porosity (%) | 38.33 | 72.5 |
| External specific surface (m2/g) | 13.4 | 70.68 |