Table 2.
Original and modified treatment conditions based on PCB 77 dechlorination byproducts
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Mixture components | DMSOa (0.1 %v/v vehicle) | 0 ha [μM (ppm)] | 10 ha [μM (ppm)] | 10 h without PCB 77b [μM (ppm)] | 24 ha [μM (ppm)] | 24 h without PCB 77b [μM (ppm)] | 24 h with addition of 10 h PCB 77c [μM (ppm)] | 48 ha [μM (ppm)] | 10 h Concentration of PCB 77 d [μM (ppm)] | 24 h Concentration of PCB 77d [μM (ppm)] |
| PCB 77 | – | 5 (1.46) | 0.7 (0.200) | – | 0.2 (0.064) | – | 0.7 (0.200) | – | 0.7 (0.200) | 0.2 (0.064) |
| PCB 37 | – | – | 0.2 (0.042) | 0.2 (0.042) | 0.1 (0.020) | 0.1 (0.020) | 0.1 (0.020) | – | – | – |
| PCB 35 | – | – | 0.2 (0.042) | 0.2 (0.042) | 0.1 (0.020) | 0.1 (0.020) | 0.1 (0.020) | – | – | – |
| PCB 15 | – | – | 0.5 (0.110) | 0.5 (0.110) | 0.4 (0.090) | 0.4 (0.090) | 0.4 (0.090) | – | – | – |
| PCB 13 | – | – | 0.3 (0.076) | 0.3 (0.076) | 0.3 (0.070) | 0.3 (0.070) | 0.3 (0.070) | – | – | – |
| PCB 12 | – | – | 0.3 (0.076) | 0.3 (0.076) | 0.3 (0.070) | 0.3 (0.070) | 0.3 (0.070) | – | – | – |
| PCB 11 | – | – | 0.5 (0.110) | 0.5 (0.110) | 0.4 (0.090) | 0.4 (0.090) | 0.4 (0.090) | – | – | – |
| PCB 03 | – | – | 0.1 (0.028) | 0.1 (0.028) | 0.1 (0.024) | 0.1 (0.024) | 0.1 (0.024) | – | – | – |
| PCB 02 | – | – | 0.1 (0.028) | 0.1 (0.028) | 0.1 (0.024) | 0.1 (0.024) | 0.1 (0.024) | – | – | – |
| Biphenyl | – | – | 1.9 (0.300) | 1.9 (0.300) | 3.1 (0.480) | 3.1 (0.480) | 3.1 (0.480) | 5 (0.771) | – | – |
| Total Concentration | – | 5 (1.46) | 5 (1.01) | 4.3 (0.810) | 5 (0.954) | 4.8 (0.890) | 5.5 (1.09) | 5 (0.771) | 0.7 (0.200) | 0.2 (0.064) |
Concentrations listed represent final PCB concentrations in cell culture media
a
Treatment compositions representing different products at various points in the dechlorination process (see also Table 1)
b
Treatment compositions representing dechlorination products at 10 and 24 h of dechlorination without the parent compound, PCB 77
c
Treatment composition representing the dechlorination products of 24 h dechlorination with the increased concentration of PCB 77 present at 10 h of dechlorination
d
Treatment composition representing the concentrations of PCB 77 present at 10 and 24 h of dechlorination