Table 1. Distribution of [BR-14C]-1 in an illuminated water–sediment system and dark control.
| % of the applied 14C | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Light irradiation | Dark control | ||||||||
| Days | 0 | 4 | 7 | 14 | 28 | 4 | 7 | 14 | 28 |
| Volatile 14C | na | 0.5 | 1.5 | 4.9 | 11.3 | 0.2 | 0.3 | 0.8 | 1.4 |
| 14CO2 | na | 0.5 | 1.5 | 4.9 | 11.2 | 0.2 | 0.3 | 0.8 | 1.4 |
| Others | na | nd | nd | nd | 0.1 | nd | nd | nd | nd |
| Aqueous 14C | 99.5 | 74.7 | 60.4 | 60.2 | 55.1 | 72.7 | 59.6 | 57.4 | 36.0 |
| 1 | 99.1 | 57.9 | 48.2 | 21.0 | nd | 72.5 | 59.6 | 57.1 | 35.7 |
| 2 | nd | 11.2 | 1.1 | nd | nd | nd | nd | nd | nd |
| 3 | nd | 1.2 | 1.8 | nd | nd | nd | nd | nd | nd |
| 4 | nd | 0.8 | 6.3 | 4.2 | 2.1 | nd | nd | nd | nd |
| 5–8 | nd | nd | nd | nd | nd | nd | nd | nd | nd |
| Others | 0.4 | 3.6 | 3.1 | 35.0 | 53.0 | 0.2 | nd | 0.3 | 0.3 |
| Sediment 14C | 0.9 | 25.1 | 22.9 | 21.7 | 14.4 | 24.6 | 36.8 | 41.7 | 55.4 |
| 1 | 0.8 | 22.4 | 20.0 | 19.5 | 12.6 | 24.6 | 36.8 | 41.2 | 54.8 |
| 2 | nd | nd | 0.8 | nd | nd | nd | nd | nd | nd |
| 3 | nd | nd | 0.3 | nd | nd | nd | nd | nd | nd |
| 4 | nd | nd | 0.4 | 0.2 | 0.1 | nd | nd | nd | nd |
| 5–8 | nd | nd | nd | nd | nd | nd | nd | nd | nd |
| Others | 0.1 | 2.7 | 1.4 | 2.0 | 1.7 | nd | nd | 0.5 | 0.6 |
| Total 1 | 99.9 | 80.3 | 68.2 | 40.5 | 12.6 | 97.1 | 96.4 | 98.3 | 90.5 |
| Bound residue 14C | nd | 2.5 | 8.7 | 9.9 | 16.8 | 2.0 | 4.8 | 4.8 | 4.9 |
| Total 14C | 100.4 | 102.8 | 93.5 | 96.7 | 97.6 | 99.5 | 101.5 | 104.8 | 97.7 |
| Aqueous ORP (mV) | 312 | 248 | 213 | 236 | 229 | 259 | 151 | 201 | 263 |
| pH | 7.89 | 8.61 | 8.54 | 8.69 | 8.67 | 8.41 | 8.46 | 8.51 | 8.65 |
| DO (ppm) | 4.7 | 3.9 | 3.8 | 3.7 | 4.1 | 4.0 | 3.4 | 3.1 | 5.2 |
| Sediment ORP (mV) | −82 | −60 | −11 | −62 | 20 | −58 | −59 | −62 | 2 |
| pH | 7.41 | 8.12 | 8.16 | 8.34 | 8.19 | 8.28 | 7.60 | 8.28 | 8.06 |
na: Not analyzed. nd: not detected. Others: Consist of multiple components, none of which exceed 5.7% AR.