Spatial Distribution of PCB Dechlorinating Bacteria and Activities in Contaminated Soil

Table 3

The potential dechlorination activity of the soil samples in microcosms. Locations not listed here did not show any dechlorination activity.

Location	Max rate·10^−3a; (mol% 2,3,4,5,6-CB × day^−1)	Lag phase (d)	PCB 116 remaining after 200 days (mol% 2,3,4,5,6-CB)	Dechlorination products
Meb10	4.2 (0.7)	0–50	46.0 (7.0)	2,3,4,6-CB/2,3,5,6-CB^b; 2,3,6-CB, 2,6-CB^c
Meb12	4.2 (4.1)	0–130	82.3 (5.8)	2,3,4,6-CB/2,3,5,6-CB
Meb13	3.4 (3.8)	0–150	78.0 (15.6)	2,3,4,6-CB/2,3,5,6-CB
Meb16	6.9 (5.3)	0–105	58.7 (27.6)	2,3,4,6-CB/2,3,5,6-CB
Meb17	0.9 (1.7)	0–200	89.7 (18.2)	2,3,4,6-CB/2,3,5,6-CB
Meb19	3.0 (5.0)	0–200	68.3 (49.7)	2,3,4,6-CB/2,3,5,6-CB
Negative control	0.1	—	98	—

^aMean values are given and figures in brackets are standard deviations (𝑛=3).
^bThe products 2,3,4,6-CB/2,3,5,6-CB coeluted during GC analysis.
^cThis product was detected in one of three replicate cultures <5 mol%.