Microbiology of formation waters from the deep repository of liquid radioactive wastes Severnyi

The presence, diversity, and geochemical activity of microorganisms in the Severnyi repository of liquid radioactive wastes were studied. Cultivable anaerobic denitrifiers, fermenters, sulfate-reducers, and methanogens were found in water samples from a depth of 162–405 m below sea level. Subsurface...

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Veröffentlicht in:FEMS microbiology ecology 2004-07, Vol.49 (1), p.97-107
Hauptverfasser: Nazina, Tamara N, Kosareva, Inessa M, Petrunyaka, Vladimir V, Savushkina, Margarita K, Kudriavtsev, Evgeniy G, Lebedev, Valeriy A, Ahunov, Viktor D, Revenko, Yuriy A, Khafizov, Robert R, Osipov, George A, Belyaev, Sergey S, Ivanov, Mikhail V
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container_end_page 107
container_issue 1
container_start_page 97
container_title FEMS microbiology ecology
container_volume 49
creator Nazina, Tamara N
Kosareva, Inessa M
Petrunyaka, Vladimir V
Savushkina, Margarita K
Kudriavtsev, Evgeniy G
Lebedev, Valeriy A
Ahunov, Viktor D
Revenko, Yuriy A
Khafizov, Robert R
Osipov, George A
Belyaev, Sergey S
Ivanov, Mikhail V
description The presence, diversity, and geochemical activity of microorganisms in the Severnyi repository of liquid radioactive wastes were studied. Cultivable anaerobic denitrifiers, fermenters, sulfate-reducers, and methanogens were found in water samples from a depth of 162–405 m below sea level. Subsurface microorganisms produced methane from [2- 14C]acetate and [ 14C]CO 2, formed hydrogen sulfide from Na 2 35SO 4, and reduced nitrate to dinitrogen in medium with acetate. The cell numbers of all studied groups of microorganisms and rates of anaerobic processes were higher in the zone of dispersion of radioactive wastes. Microbial communities present in the repository were able to utilise a wide range of organic and inorganic compounds and components of waste (acetate, nitrate, and sulfate) both aerobically and anaerobically. Bacterial production of gases may result in a local increase of the pressure in the repository and consequent discharge of wastes onto the surface. Microorganisms can indirectly decrease the mobility of radionuclides due to consumption of oxygen and production of sulfide, which favours deposition of metals. These results show the necessity of long-term microbiological and radiochemical monitoring of the repository.
doi_str_mv 10.1016/j.femsec.2004.02.017
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Cultivable anaerobic denitrifiers, fermenters, sulfate-reducers, and methanogens were found in water samples from a depth of 162–405 m below sea level. Subsurface microorganisms produced methane from [2- 14C]acetate and [ 14C]CO 2, formed hydrogen sulfide from Na 2 35SO 4, and reduced nitrate to dinitrogen in medium with acetate. The cell numbers of all studied groups of microorganisms and rates of anaerobic processes were higher in the zone of dispersion of radioactive wastes. Microbial communities present in the repository were able to utilise a wide range of organic and inorganic compounds and components of waste (acetate, nitrate, and sulfate) both aerobically and anaerobically. Bacterial production of gases may result in a local increase of the pressure in the repository and consequent discharge of wastes onto the surface. 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Cultivable anaerobic denitrifiers, fermenters, sulfate-reducers, and methanogens were found in water samples from a depth of 162–405 m below sea level. Subsurface microorganisms produced methane from [2- 14C]acetate and [ 14C]CO 2, formed hydrogen sulfide from Na 2 35SO 4, and reduced nitrate to dinitrogen in medium with acetate. The cell numbers of all studied groups of microorganisms and rates of anaerobic processes were higher in the zone of dispersion of radioactive wastes. Microbial communities present in the repository were able to utilise a wide range of organic and inorganic compounds and components of waste (acetate, nitrate, and sulfate) both aerobically and anaerobically. Bacterial production of gases may result in a local increase of the pressure in the repository and consequent discharge of wastes onto the surface. 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source Oxford Journals Open Access Collection; MEDLINE; Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Acetic acid
Anaerobic microorganisms
Anaerobic processes
Bacteria - isolation & purification
Bacteria - metabolism
Biodegradation, Environmental
Carbon dioxide
Colony Count, Microbial
Ecology
Environmental Monitoring
Fermenters
Gas chromatography–mass spectrometry
Gases
Hydrogen sulfide
Inorganic compounds
Liquid radioactive waste repository
Liquid wastes
Marine
Metals
Methanogenesis
Methanogenic bacteria
Microbial activity
Microbial gas production
Microbiology
Microorganisms
Oxygen consumption
Radioactive Waste - analysis
Radioactive wastes
Radiochemistry
Radioisotopes
Repositories
Sea level
Subsurface
Sulfate reduction
Sulfates
Wastes
Water - analysis
Water depth
Water Microbiology
Water Pollutants, Radioactive - metabolism
Water sampling
title Microbiology of formation waters from the deep repository of liquid radioactive wastes Severnyi
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