Role of Various Microorganisms on Tc Behavior in Sediments
| Autor: | Z Moureau, F. Capot, K. Fonsny, L Pignolet, F. Auvray |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Water Pollutants
Radioactive Epidemiology Health Toxicology and Mutagenesis Microorganism Population Marine bacteriophage Moraxella Soil Pollutants Soil Pollutants Radioactive Seawater Water Pollutants Radiology Nuclear Medicine and imaging Sulfate-reducing bacteria education Planococcaceae education.field_of_study biology Chemistry Temperature Technetium Biodegradation biology.organism_classification Planococcus Biodegradation Environmental Environmental chemistry Water Microbiology Bacteria Micrococcaceae |
| Zdroj: | Health Physics. 57:791-800 |
| ISSN: | 0017-9078 |
| Popis: | Marine bacteria (Moraxella sp., Planococcus sp. and a mixed population of anaerobes) from a coastal sediment were found to concentrate Tc. Maximum concentration of this element occurred during the stationary phase of growth of the bacteria, at low redox potential. A metabolic process seems responsible for Tc concentration by bacteria, in which it binds to high molecular weight cellular constituents. Polysaccharidic polymers, which were visualized around the bacterial cells with the scanning electron microscope, might bind Tc, but direct experimental evidence in favor of this hypothesis was not yet obtained. The role of sedimentary bacteria in the behavior of Tc in the marine environment is briefly discussed. The action of sulfate-reducing microorganisms is considered. |
| Databáze: | OpenAIRE |
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