Bioremediation of radioactive waste: radionuclide–microbe interactions in laboratory and field-scale studies

Lloyd, Jonathan R.; Renshaw, Joanna C.

doi:10.1016/j.copbio.2005.04.012

Cited by 181 publications

(109 citation statements)

References 36 publications

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“…Microorganisms can potentially affect radionuclide migration by various processes including biosorption, biomineralization, intracellular accumulation, biotransformations, etc. [11][12][13][14][15][16][17]. In addition, microbial occurrence can influence the release of radionuclides by changing geochemical conditions (especially pH and Eh), by producing organic complexes [18].…”

Section: Introductionmentioning

confidence: 99%

Bacterial Diversity in Bentonites, Engineered Barrier for Deep Geological Disposal of Radioactive Wastes

López-Fernández

Cherkouk²,

Vílchez-Vargas

et al. 2015

Microb Ecol

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The long-term disposal of radioactive wastes in a deep geological repository is the accepted international solution for the treatment and management of these special residues. The microbial community of the selected host rocks and engineered barriers for the deep geological repository may affect the performance and the safety of the radioactive waste disposal. In this work the bacterial population of bentonite formations of Almeria (Spain), selected as reference material for bentonite engineered barriers in the disposal of radioactive wastes, was studied. 16S rRNA gene-based approaches were used to study the bacterial community of the bentonite samples by traditional clone libraries and Illumina-sequencing. By both techniques the bacterial diversity analysis revealed similar results, with phylotypes belonging to 14 different bacterial phyla:

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Section: Introductionmentioning

confidence: 99%

Bacterial Diversity in Bentonites, Engineered Barrier for Deep Geological Disposal of Radioactive Wastes

López-Fernández

Cherkouk²,

Vílchez-Vargas

et al. 2015

Microb Ecol

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“…While many analytical approaches exist to address dissolved species of toxicants, there is a need to characterize sediments and soils per se in terms of materials or particles which bind toxicants and modulate their bioavailability and rate of burial as well as obtaining information on the activities of specific microbial taxa in communities that inhabit the treated site (Lloyd & Renshaw 2005;Wiatrowski & Barkay 2005). Several approaches have been discussed recently by NRC (2003), Nolan et al (2003) and Wiatrowski & Barkay (2005).…”

Section: Perspectives and Recommendationsmentioning

confidence: 99%

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides. 3. Influence of Chemical Speciation and Bioavailability on Contaminants Immobilization/Mobilization Bio-processes

Hullebusch

Lens

Tabak

2005

Rev Environ Sci Biotechnol

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The biotransformation of metals is an exciting, developing strategy to treat metal contamination, especially in environments that are not accessible to other remediation technologies. However, our ability to benefit from these strategies hinges on our ability to monitor these transformations in the environment. That's why remediation of contaminated sediments and soil requires detailed in situ characterization of the speciation of the toxic substances and their transformations with respect to time and spatial distribution. The present paper gives an overview of the literature regarding research performed in the laboratory as well as in the field.

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“…More importantly, SRB populations are also found to be significant members of microbial communities involved in such metal reduction and are ubiquitous even in extreme environments (Chang et al, 2001;Gillan et al, 2005;Bagwell et al, 2006;Fields et al, 2006). Therefore, stimulation of SRB activities has been considered as a useful approach for the immobilization of heavy metals and radionuclides (Landa, 2005;Lloyd and Renshaw, 2005).…”

Section: Introductionmentioning

confidence: 99%

Impact of elevated nitrate on sulfate-reducing bacteria: a comparative Study of Desulfovibrio vulgaris

Joyner

et al. 2010

The ISME Journal

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Sulfate-reducing bacteria have been extensively studied for their potential in heavy-metal bioremediation. However, the occurrence of elevated nitrate in contaminated environments has been shown to inhibit sulfate reduction activity. Although the inhibition has been suggested to result from the competition with nitrate-reducing bacteria, the possibility of direct inhibition of sulfate reducers by elevated nitrate needs to be explored. Using Desulfovibrio vulgaris as a model sulfate-reducing bacterium, functional genomics analysis reveals that osmotic stress contributed to growth inhibition by nitrate as shown by the upregulation of the glycine/betaine transporter genes and the relief of nitrate inhibition by osmoprotectants. The observation that significant growth inhibition was effected by 70 mM NaNO 3 but not by 70 mM NaCl suggests the presence of inhibitory mechanisms in addition to osmotic stress. The differential expression of genes characteristic of nitrite stress responses, such as the hybrid cluster protein gene, under nitrate stress condition further indicates that nitrate stress response by D. vulgaris was linked to components of both osmotic and nitrite stress responses. The involvement of the oxidative stress response pathway, however, might be the result of a more general stress response. Given the low similarities between the response profiles to nitrate and other stresses, less-defined stress response pathways could also be important in nitrate stress, which might involve the shift in energy metabolism. The involvement of nitrite stress response upon exposure to nitrate may provide detoxification mechanisms for nitrite, which is inhibitory to sulfate-reducing bacteria, produced by microbial nitrate reduction as a metabolic intermediate and may enhance the survival of sulfate-reducing bacteria in environments with elevated nitrate level.

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Bioremediation of radioactive waste: radionuclide–microbe interactions in laboratory and field-scale studies

Cited by 181 publications

References 36 publications

Bacterial Diversity in Bentonites, Engineered Barrier for Deep Geological Disposal of Radioactive Wastes

Bacterial Diversity in Bentonites, Engineered Barrier for Deep Geological Disposal of Radioactive Wastes

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides. 3. Influence of Chemical Speciation and Bioavailability on Contaminants Immobilization/Mobilization Bio-processes

Impact of elevated nitrate on sulfate-reducing bacteria: a comparative Study of Desulfovibrio vulgaris

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