| HDD | Hydrodynamic diameter |
| HA | Humic acid |
| DI | Deionized |
| RSD | Relative standard deviation |
| TOC | Total organic carbon |
| USEPA | United States Environmental Protection Agency |
| EU | European Union |
| WHO | World Health Organization |
| pzc | Point of zero charge |
| EDL | Electrical double layer |
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