Distribution and activity of microorganisms in the deep repository for liquid radioactive waste at the Siberian Chemical Combineстатья
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Web of Science ,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Авторы:
Nazina T.N. ,
Luk’yanova E.A. ,
Zakharova E.V. ,
Ivoilov V.S. ,
Poltaraus A.B. ,
Kalmykov S.N. ,
Belyaev S.S. ,
Zubkov A.A.
Журнал:
Microbiology
Том:
75
Номер:
6
Год издания:
2006
Издательство:
Pleiades Publishing, Ltd
Местоположение издательства:
Road Town, United Kingdom
Первая страница:
727
Последняя страница:
738
DOI:
10.1134/S0026261706060178
Аннотация:
The physicochemical conditions, composition of microbial communities, and the rates of anaerobic processes in the deep sand horizons used as a repository for liquid radioactive wastes (LRW) at the Siberian Chemical Combine (Seversk, Tomsk oblast), were studied. Formation waters from the observation wells drilled into the horizons used for the radioactive waste disposal were found to be inhabited by microorganisms of different physiological groups, including aerobic organotrophs, anaerobic fermentative, denitrifying, sulfate-reducing, and methanogenic bacteria. The density of microbial population, as determined by cultural methods, was low and usually did not exceed 104 cells/ml. Enrichment cultures of microorganisms producing gases (hydrogen, methane, carbon dioxide, and hydrogen sulfide) and capable of participation in the precipitation of metal sulfides were obtained from the waters of the disposal site. The contemporary processes of sulfate reduction and methanogenesis were assayed; the rates of these terminal processes of organic matter destruction were found to be low. The denitrifying bacteria from the deep repository were capable of reducing the nitrates contained in the wastes, provided sources of energy and biogenic elements were available. Biosorption of radionuclides by the biomass of aerobic bacteria isolated from groundwater was demonstrated. The results obtained give us insight into the functional structure of the microbial community inhabiting the waters of repository horizons. This study indicates that the numbers and activity of microbial cells are low both inside and outside the zone of radioactive waste dispersion, in spite of the long period of waste discharge. © Nauka/Interperiodica 2006.
Добавил в систему:
Калмыков Степан Николаевич