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Effects of four nanomaterials on soil at the same pollution level_
| / | Index levels at different times after the experiment | ||||
|---|---|---|---|---|---|
| Types of nanomaterials | Comparison indicators | Week 1 | Week 2 | Week 3 | Week 4 |
| TDNC | Pollutant concentration (mg/g) | 80.3 | 75.4 | 71.1 | 68.2 |
| Pollutant level index | 80 | 74 | 70 | 66 | |
| GI–TDNC | Pollutant concentration (mg/g) | 77.5 | 70.3 | 64.8 | 58.6 |
| Pollutant level index | 75 | 68 | 60 | 53 | |
| GNPs | Pollutant concentration (mg/g) | 81.1 | 76.6 | 71.9 | 69.1 |
| Pollutant level index | 82 | 75 | 72 | 70 | |
| GI–GNP | Pollutant concentration (mg/g) | 78.4 | 71.6 | 65.6 | 59.5 |
| Pollutant level index | 76 | 69 | 62 | 55 | |