TABLE 2.
Water 65Cu concentrations from experiments with freshly spiked sediment and sediment aged for 2 years.
| Compound | Nominal conc. | Freshly spiked sediment (µg 65Cu L−1) | Two-year aged sediment (µg 65Cu L−1) |
|---|---|---|---|
| Tend, fresh | Tend, aged | ||
| 65CuCl2 | 0 | 0.1 ± 0.0 | 0.0 ± 0.0 |
| 18 | 12.8 ± 4.1 | 4.1 ± 1.2 | |
| 53 | 32.9 ± 8.2 | 9.5 ± 2.3 | |
| 112 | 59.7 ± 5.9 | 19.0 ± 3.4 | |
| 227 | 73.3 ± 4.0 | 31.9 ± 10.7 | |
| 65CuO NP | 0 | 0.0 ± 0.0 | 0.0 ± 0.0 |
| 3 | 2.9 ± 1.0 | 0.6 ± 0.5 | |
| 8.9 | 7.8 ± 1.8 | 0.7 ± 0.2 | |
| 18 | 12.6 ± 3.0 | 2.7 ± 1.0 | |
| 36.5 | 20.8 ± 4.8 | 5.5 ± 1.9 |
Samples were collected at exposure termination after 28 days (Tend, fresh, Tend, aged). Concentrations are presented as mean ± SD; µg 65Cu L−1, n = 5.