Microbial Community Composition Near Depleted Uranium Impact Points
| Autor: | C. M. Reynolds, L. Karr, D. B. Ringelberg |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Health
Toxicology and Mutagenesis Microorganism Environmental engineering Soil Science Soil chemistry complex mixtures Pollution chemistry.chemical_compound Deposition (aerosol physics) Microbial population biology chemistry Environmental chemistry Depleted uranium Soil water Environmental Chemistry Composition (visual arts) Sulfate |
| Zdroj: | Soil and Sediment Contamination: An International Journal. 13:563-577 |
| ISSN: | 1549-7887 1532-0383 |
| DOI: | 10.1080/10588330490519446 |
| Popis: | Military training activities can result in the deposition of depleted uranium (DU) into surface soils. Mechanisms of introduction include the generation of dust from firing and impact as well as the eventual corrosion of projectile fragments and unexploded ordnance. Microorganisms in surface soils have the potential to affect the transport of DU by direct binding of the metal to the cell surface, by altering near field soil chemistry that affects metal solubility, and by microbially influenced corrosion. We investigated the response (in terms of community composition) of a native soil microbiota to the presence of DU in an arid environment. Bacteria in soils outside of the test area were challenged in dilute media with “yellow cake” or U 3 O 8 . At concentrations of 200 to 20,000 mg L− 1 only species of Bacillus were identified. In situ characterizations (by PLFA analysis) of exposed site soils showed an enrichment in sulfate reducing bacterial (i17:1w7c up 39%) and Bacillus species (a15:0 up 35%) biomark... |
| Databáze: | OpenAIRE |
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