TABLE 2.
Effect of various halogenated biphenyl primers on the highly chlorinated PCBs in the Aroclor 1260 residue in Woods Pond sediment
| PCB homolog | Initial mol% | % Decrease resulting from primed dechlorinationa
|
||||
|---|---|---|---|---|---|---|
| Process P
|
Process N
|
|||||
| 25-34-CB (84 days)b | 4-4-BB (120 days) | 23456-CB (141 days)c | 23456-CB, third generation (133 days)d | 26-BB (125 days) | ||
| Hexachlorobiphenyls | 39.6 | 21.9 ± 0.9 | 34.9 ± 0.3 | 47.2 ± 0.5 | 64.2 | 76.9 ± 0.5 |
| Heptachlorobiphenyls | 24.3 | 7.9 ± 0.4 | 22.8 ± 0.9 | 43.9 ± 0.1 | 76.2 | 78.4 ± 0.6 |
| Octachlorobiphenyls | 5.2 | 1.7 ± 0.1 | 11.2 ± 1.7 | 20.7 ± 0.0 | 53.0 | 61.4 ± 1.1 |
| Hexa- to nonachlorobiphenyls | 69.8 | 14.8 ± 0.6 | 28.4 ± 0.6 | 43.0 ± 0.2 | 67.8 | 75.6 ± 0.2 |
a
The values are means and ranges based on data from duplicate samples. All decreases shown are significant (P ≤ 0.05) as determined by a t test. All primers were used at a final concentration of 350 μM.
b
Data from Bedard et al. (1).
c
Data from Van Dort et al. (32).
d
Data from a single third-generation enrichment with 23456-CB (8) are shown for comparison.