RDX (Hexahydro-1,3,5-trinitro-1,3,5-triazine) biodegradation in aquifer sediments under manganese-reducing conditions

被引：32

作者：

Bradley, Paul M. ^{[1
]}

Dinicola, Richard S. ^{[2
]}

机构：

[1] U.S. Geological Survey, Columbia, SC, 29210-7651, 720 Gracern Road

[2] U.S. Geological Survey, Tacoma, WA, 98402, 1201 Pacific Avenue

来源：

Bioremediation Journal | 2005年 / 9卷 / 01期

关键词：

Anoxic; Aquifer; Biodegradation; Metal; Microbial degradation; RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine); Reduction; Sediment microcosms;

D O I：

10.1080/10889860590929574

中图分类号：

学科分类号：

摘要：

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 of 14C-RDX to 14CO 2 was observed in aquifer sediment microcosms under native, manganese-reducing, anoxic conditions. Significant increases in the mineralization of 14C-RDX to 14CO 2 were observed in anoxic microcosms under NO 3-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. © 2005 Taylor and Francis Inc.

引用

页码：1 / 8

页数：7

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