Role of various microorganisms on Tc behavior in sediments

Journal Article · Wed Nov 01 00:00:00 EST 1989 · Health Physics; (USA)

DOI:https://doi.org/10.1097/00004032-198911000-00013· OSTI ID:5038442

Pignolet, L; Auvray, F; Fonsny, K; Capot, F; Moureau, Z ^[1]

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1. Universite Catholique de Louvain, Louvain-la-Neuve (Belgium)

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.

• OSTI ID: 5038442
• Journal Information: Health Physics; (USA), Vol. 57:5; ISSN 0017-9078
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
SEDIMENTS
RADIONUCLIDE MIGRATION
TECHNETIUM
BIODEGRADATION
BACTERIA
POLYSACCHARIDES
REDOX POTENTIAL
SCANNING ELECTRON MICROSCOPY
SEAWATER
SULFATE-REDUCING BACTERIA
WATER POLLUTION
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
ELECTRON MICROSCOPY
ELEMENTS
ENVIRONMENTAL TRANSPORT
HYDROGEN COMPOUNDS
MASS TRANSFER
METALS
MICROORGANISMS
MICROSCOPY
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
SACCHARIDES
TRANSITION ELEMENTS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology