Matches in SemOpenAlex for { <https://semopenalex.org/work/W3085758929> ?p ?o ?g. }
Showing items 1 to 70 of
70
with 100 items per page.
- W3085758929 abstract "<p>A multi-barrier system in which the radioactive waste is encapsulated in metal containers surrounded by a geotechnical barrier (e.g. compacted bentonite) deep underground in a stable geological formation is one of the internationally accepted options for the disposal of highly radioactive waste. Bentonites have good properties such as high swelling capacity and low hydraulic conductivity, which makes them favorable as backfilling material. However, indigenous microorganisms may affect these properties. Bentonite samples were collected from the Full-scale Engineered Barrier Experiment (FEBEX) - Dismantling Project [1] at the Grimsel Test Site (Switzerland) to study their microbial diversity. For that, total DNA was extracted directly from the cores and from enrichments of sulfate- and iron-reducing microorganisms as well as microorganisms were isolated from those enrichments. The microbial communities of the bentonites, the enrichments, as well as the isolates were analyzed by 16S rRNA gene sequencing. The results showed that Actinobacteria and Alphaproteobacteria dominated the FEBEX bentonite microbial population, while the dominant phylum in both enrichments was Firmicutes: concretely, Bacilli and Clostridia classes. In addition, bacteria from the genera <em>Desulfitobacterium</em>, <em>Desulfosporosinus</em> and <em>Clostridium</em> were isolated from the enrichments. <em>Desulfosporosinus hippei</em> DSM 8344 as a phylogenetic close relative was selected to study its interactions with uranium and especially its potential to reduce U(VI) to U(IV). This study revealed that microorganisms are present in bentonite samples after a long-term continuous heating. Sulfate- and iron-reducing microbes were enriched by using favorable conditions in specific media and the potential of the sulfate-reducing microorganisms on the reduction of uranium was verified. Therefore, it is important to characterize the microbial population of the bentonite, because microbes might compromise the safety of the deep geological repository of highly radioactive waste.</p><p>[1]http://www.grimsel.com/gts-phase-vi/febex-dp/febex-dp-introduction</p>" @default.
- W3085758929 created "2020-09-21" @default.
- W3085758929 creator A5012086326 @default.
- W3085758929 creator A5017704659 @default.
- W3085758929 creator A5033676925 @default.
- W3085758929 creator A5044477797 @default.
- W3085758929 creator A5072258366 @default.
- W3085758929 creator A5087117317 @default.
- W3085758929 date "2020-03-23" @default.
- W3085758929 modified "2023-09-25" @default.
- W3085758929 title "Microbial activity in nuclear waste repository systems" @default.
- W3085758929 doi "https://doi.org/10.5194/egusphere-egu2020-9654" @default.
- W3085758929 hasPublicationYear "2020" @default.
- W3085758929 type Work @default.
- W3085758929 sameAs 3085758929 @default.
- W3085758929 citedByCount "0" @default.
- W3085758929 crossrefType "posted-content" @default.
- W3085758929 hasAuthorship W3085758929A5012086326 @default.
- W3085758929 hasAuthorship W3085758929A5017704659 @default.
- W3085758929 hasAuthorship W3085758929A5033676925 @default.
- W3085758929 hasAuthorship W3085758929A5044477797 @default.
- W3085758929 hasAuthorship W3085758929A5072258366 @default.
- W3085758929 hasAuthorship W3085758929A5087117317 @default.
- W3085758929 hasConcept C107872376 @default.
- W3085758929 hasConcept C151730666 @default.
- W3085758929 hasConcept C175605896 @default.
- W3085758929 hasConcept C185592680 @default.
- W3085758929 hasConcept C2777695942 @default.
- W3085758929 hasConcept C2777979977 @default.
- W3085758929 hasConcept C2778169975 @default.
- W3085758929 hasConcept C2778312467 @default.
- W3085758929 hasConcept C31903555 @default.
- W3085758929 hasConcept C42062724 @default.
- W3085758929 hasConcept C523546767 @default.
- W3085758929 hasConcept C54355233 @default.
- W3085758929 hasConcept C81407943 @default.
- W3085758929 hasConcept C86803240 @default.
- W3085758929 hasConcept C89423630 @default.
- W3085758929 hasConceptScore W3085758929C107872376 @default.
- W3085758929 hasConceptScore W3085758929C151730666 @default.
- W3085758929 hasConceptScore W3085758929C175605896 @default.
- W3085758929 hasConceptScore W3085758929C185592680 @default.
- W3085758929 hasConceptScore W3085758929C2777695942 @default.
- W3085758929 hasConceptScore W3085758929C2777979977 @default.
- W3085758929 hasConceptScore W3085758929C2778169975 @default.
- W3085758929 hasConceptScore W3085758929C2778312467 @default.
- W3085758929 hasConceptScore W3085758929C31903555 @default.
- W3085758929 hasConceptScore W3085758929C42062724 @default.
- W3085758929 hasConceptScore W3085758929C523546767 @default.
- W3085758929 hasConceptScore W3085758929C54355233 @default.
- W3085758929 hasConceptScore W3085758929C81407943 @default.
- W3085758929 hasConceptScore W3085758929C86803240 @default.
- W3085758929 hasConceptScore W3085758929C89423630 @default.
- W3085758929 hasLocation W30857589291 @default.
- W3085758929 hasOpenAccess W3085758929 @default.
- W3085758929 hasPrimaryLocation W30857589291 @default.
- W3085758929 hasRelatedWork W10595023 @default.
- W3085758929 hasRelatedWork W12089738 @default.
- W3085758929 hasRelatedWork W12339912 @default.
- W3085758929 hasRelatedWork W15955204 @default.
- W3085758929 hasRelatedWork W1615909 @default.
- W3085758929 hasRelatedWork W3152956 @default.
- W3085758929 hasRelatedWork W3789321 @default.
- W3085758929 hasRelatedWork W4634833 @default.
- W3085758929 hasRelatedWork W475377 @default.
- W3085758929 hasRelatedWork W8542633 @default.
- W3085758929 isParatext "false" @default.
- W3085758929 isRetracted "false" @default.
- W3085758929 magId "3085758929" @default.
- W3085758929 workType "article" @default.