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Silver speciation in AgNP solutions exposed to WWTP sludge following exposure to SSF for 1 hour.
| WWTP sludge exposure (min) | Ag0 (%) | Ag+ (%) | AgCl (%) | Ag2S (%) | |
|---|---|---|---|---|---|
| N20 | 1 | 93 | 7 | ||
| 60 | 59 | 11 | 30 | ||
| N50 | 1 | 94 | 6 | ||
| 60 | 66 | 34 | |||
| N100 | 1 | 100 | |||
| 60 | 80 | 20 | |||
| CP4 | 1 | 91 | 9 | ||
| 60 | 90 | 10 | |||
| PVP (15nm) | 1 | 89 | 11 | ||
| 60 | 6 | 22 | 72 |
