F. H. Chapelle J. E. Landmeyer J.G. Schumacher P. M. Bradley 1997 <p><span>Microorganisms indigenous to a shallow aquifer, which underlies an explosives-contaminated site, mineralized 28% of [U-ring-</span>¹⁴<span>C] 2,4–dinitrotoluene to </span>¹⁴<span>CO</span>₂<span> within 28 days under aerobic conditions. Approximately 20% of added 2,4–dinitrotoluene remained undegraded at the end of the incubation while approximately 22% and 6% were transformed to 4–amino-2–nitrotoluene and 2–amino-4–nitrotoluene, respectively. In aquifer microcosms containing 2,6–dinitrotoluene, approximately 67% of the substrate remained undegraded and approximately 14% was transformed to 2–amino-6–nitrotoluene. The radiolabeled study indicated that about 8% of the 2,6–dinotrotoluene was mineralized to CO</span>₂<span>. The demonstrated degradation and subsequent mineralization of dinitrotoluene compounds by aquifer microorganisms are consistent with the decline in dissolved dinitrotoluene concentrations observed along the general ground-water flowpath at the site. The results indicate that intrinsic bioremediation may be a viable alternative for remediating contaminated ground water at this site.</span></p> application/pdf 10.1111/j.1745-6584.1997.tb00054.x en Wiley Potential for intrinsic bioremediation of a DNT-contaminated aquifer article