RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) biodegradation in aquifer sediments under manganese-reducing conditions
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Abstract
A shallow, RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine)–contaminated aquifer at Naval Submarine Base Bangor has been characterized as predominantly manganese-reducing, anoxic with local pockets of oxic conditions. The potential contribution of microbial RDX degradation to localized decreases observed in aquifer RDX concentrations was assessed in sediment microcosms amended with [U-14C] RDX. Greater than 85% mineralization of14C-RDX to 14CO2 was observed in aquifer sediment microcosms under native, manganese-reducing, anoxic conditions. Significant increases in the mineralization of 14C-RDX to 14CO2 were observed in anoxic microcosms under NO3-amended or Mn(IV)-amended conditions. No evidence of 14C-RDX biodegradation was observed under oxic conditions. These results indicate that microbial degradation of RDX may contribute to natural attenuation of RDX in manganese-reducing aquifer systems.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) biodegradation in aquifer sediments under manganese-reducing conditions |
| Series title | Bioremediation Journal |
| DOI | 10.1080/10889860590929574 |
| Volume | 9 |
| Issue | 1 |
| Year Published | 2005 |
| Language | English |
| Publisher | Taylor & Francis |
| Contributing office(s) | Washington Water Science Center |
| Description | 8 p. |
| First page | 1 |
| Last page | 8 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |