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1 Hexahydro-1 , 3 , 5-trinitro-1 , 3 , 5-triazine ( RDX ) Degradation by 2 Acetobacterium paludosum 3
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sherburne, Leslie A. Shrout, Joshua D. Alvarez, Pedro J. J. |
| Copyright Year | 2005 |
| Abstract | 10 Substrates and nutrients are often added to contaminated soil or groundwater to enhance bioremediation. 11 Nevertheless, this practice may be counterproductive in some cases where nutrient addition might relieve 12 selective pressure for pollutant biodegradation. Batch experiments with a homoacetogenic pure culture of 13 Acetobacterium paludosum showed that anaerobic RDX degradation is the fastest when auxiliary growth 14 substrates (yeast extract plus fructose) and nitrogen sources (ammonium) are not added. This bacterium 15 degraded RDX faster under autotrophic (H2-fed) than under heterotrophic conditions, even though het16 erotrophic growth was faster. The inhibitory effect of ammonium is postulated to be due to the repression 17 of enzymes that initiate RDX degradation by reducing its nitro groups, based on the known fact that 18 ammonia represses nitrate and nitrite reductases. This observation suggests that the absence of easily 19 assimilated nitrogen sources, such as ammonium, enhances RDX degradation. Although specific end 20 products of RDX degradation were not determined, the production of nitrous oxide (N2O) suggests that 21 A. paludosum cleaved the triazine ring. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cpb-us-e1.wpmucdn.com/blogs.rice.edu/dist/3/1390/files/2012/02/58.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
