TABLE 1.
Summary of experimental conditions during four PPTs performed to evaluate microbial SO42− reduction concomitant with carbon source degradation in a PHC-contaminated aquifer
| Test | Carbon source injected | Carbon source concn (mM) | SO42− injection concn (mM) | Br− injection concn (mM) | Injection vol (liters) | Injection duration tinj (h) | Initial incubation period (h) | Total extracted vol (liters) | Total test duration (h) | Groundwater temp (°C) | SO42− background concn (mM) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PPTpr | Propionate | 1.89 | 0.92 | 0.47 | 1,000 | 0.72 | 21.9 | 1,000 | 70.4 | 12.5 | 0.05 |
| PPTbu | Butyrate | 2.19 | 1.02 | 0.51 | 1,000 | 1.67 | 24.6 | 1,000 | 72.9 | 12.7 | 0.03 |
| PPTla | Lactate | 2.05 | 1.04 | 0.53 | 1,000 | 0.95 | 21.0 | 1,000 | 70.0 | 13.1 | 0.04 |
| PPTac | Acetate | 2.36 | 1.15 | 0.58 | 1,000 | 0.93 | 21.9 | 1,000 | 71.3 | 14.5 | 0.02 |