TABLE 3.
Maximum phenanthrene degradation rates in enrichment cultures inoculated with two contaminated soils (from Dover, Ohio, and Libby, Mont.), in which a constant mass of phenanthrene was present either in the absence of sorptive phases (control and sand) or in the presence of sorptive phases (AMB, SM7, and SM2)
| Enrichment condition | Maximum phenanthrene degradation rate (μmol day−1)
|
|
|---|---|---|
| Dover soil inoculum | Libby soil inoculum | |
| Control | 3.9 (1.2)a | 5.6 (2.2) |
| Sand | 3.7 (0.3) | 4.9 (1.8) |
| AMB | 1.8 (0.4) | 2.6 (0.7) |
| SM7 | 0.34 (0.09) | 0.37 (0.16) |
| SM2 | 0.06 (0.01)b | 0.07 (0.01)b |
a
The values in parentheses are standard deviations of means for five transfers, all of which were done in duplicate.
b
The values for SM2 were based only on the initial mineralization rates and are included to show that no significant phenanthrene degradation occurred over a 30-day period.