Table 2.
Sediment characteristics at the experimental fields including total organic carbon (TOC), mercury (Hg), and PCDD/F (TEQ values derived with the 2005 WHO factors), as well as the water oxygen level (O2), salinity, and temperature measured in the bottom water during sampling month 1 (September 2009) and month 14 (October 2010)
| Field | Depth (m) | Bottom substrate | TOC (%) | Hg (ng/g) | TEQ (ng/kg) | O2 (mg/l)month 1 | 14 | Salinity month 1 | 14 | Temp. (°C) month 1 | 14 |
|---|---|---|---|---|---|---|---|---|
| Lime-30 | 29–31 | Silty clay | 1.6 ± 0.4 | 255 | 352 | 6.0 | 6.3 | 33.5 | 33.4 | 13.8 | 12.1 |
| Clay-30 | 29–30 | Silty clay | 1.6 ± 0.4 | 243 | 344 | 6.3 | 5.9 | 33.4 | 33.4 | 14.2 | 12.2 |
| AC+clay-30 | 25–29 | Silty-muddy clay | 1.5 ± 0.3 | 243 | 182 | 6.4 | 7.3 | 33.2 | 33.3 | 14.9 | 12.2 |
| Ref-30 | 29–30 | Silty-muddy clay | 1.4 ± 0.1 | 275 | 346 | 6.0 | 6.5 | 33.6 | 33.4 | 13.9 | 12.2 |
| AC+clay-95 | 93–95 | Silty-clayey mud | 2.5 ± 0.7 | 875 | 1019 | 6.7 | 5.1 | 34.0 | 34.5 | 12.0 | 7.5 |
| Ref-80 | 79–83 | Silty-clayey mud | 2.2 ± 0.4 | 951 | 1278 | 6.4 | 5.4 | 34.1 | 34.5 | 10.7 | 7.6 |
| Ref-95 | 96–98 | Silty-clayey mud | –a | –a | –a | – | 5.4 | – | 34.5 | – | 7.5 |
aThe additional reference field Ref-95 was not represented in the TOC, Hg, and PCDD/F analyses since this field was added to the experimental design after these measurements