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The potential for extracellular electron shuttles to stimulate RDX biodegradation was investigated with RDX-contaminated aquifer material. Electron shuttling compounds including anthraquinone-2,6-disulfonate (AQDS) and soluble humic substances stimulated RDX mineralization in aquifer sediment. RDX mass-loss was similar in electron shuttle amended and donor-alone treatments; however, the concentrations...
This study investigated extracellular electron shuttle-mediated RDX biodegradation and the distribution of ring cleavage metabolites generated by biological degradation (cells) versus the products formed by abiotic degradation (reduced electron shuttles), and when the two pathways were acting simultaneously. All pathways were influenced by pH. Buffered suspensions (pH 6.8/7.9/9.2) were performed with...
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