Microbial analysis of samples from the tunnel sealing experiment at AECL’s Underground Research Laboratory

Stroes-Gascoyne, S.; Hamon, C.J.; Dixon, David A.; Martino, J.B.

doi:10.1016/j.pce.2006.01.002

Cited by 34 publications

(14 citation statements)

References 9 publications

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“…Many countries are considering long-term disposal of nuclear waste in a deep geological formation, encapsulated in metal container, surrounded by a bentonite-engineered barrier, and emplaced in the host rock [1][2][3]. In Spain, bentonite formations located in Almeria have been intensely studied due to their possible use as natural analogue of the bentonite-engineered barrier in the deep geological repository for radioactive waste.…”

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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“…The chemically defined minimal medium (M1) was prepared according to Esnault et al [31]. The composition consisted in a mixture of 9 mM (NH 4 ) 2 4 .5H 2 O, 17 mM HEPES buffer, amino acids (0.11 mM arginine, 0.13 mM glutamate, 0.19 mM serine), and vitamins (0.08 mM nicotinic acid, 0.01 mM thiamine-HCl, 0.40 µM biotine). The pH was adjusted to ca.…”

Section: Bacterial Culturementioning

confidence: 99%

“…magnetite, Fe 3 O 4 ) or hydroxides, and dihydrogen (H 2 ) are also expected to be formed according to the following reactions (Eqs. [1][2][3][4][5][6][7][8] …”

Section: Introductionmentioning

confidence: 99%

“…Several studies have already pointed out the possibility of microbiological life in the deep geological disposal [2][3][4][5], and both biological activity and biofilm formation may influence the metallic corrosion rate. These phenomena are usually known as microbiologically influenced corrosion (MIC), which can represent a huge problem when promoting local metal dissolution by different mechanisms which vary with the microbial species and chemistry of the colonized metal surface [6].…”

Section: Introductionmentioning

confidence: 99%

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Influence of hydrogen-oxidizing bacteria on the corrosion of low carbon steel: Local electrochemical investigations

Moreira

Schütz

Libert

et al. 2014

Bioelectrochemistry

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Low carbon steel has been considered a suitable material for component of the multi-barrier system employed on the geological disposal of high-level radioactive waste (HLW). A non negligible amount of dihydrogen (H 2 ) is expected to be produced over the years within the geological repository due to the anoxic corrosion of metallic materials and also due to the water radiolysis. The influence of the activity of hydrogen-oxidizing bacteria (HOB) and ironreducing bacteria (IRB) on carbon steel corrosion is considered in this study because of the high availability of energetic nutriments (H 2 , iron oxides and hydroxides) produced in anoxic disposal conditions. Local electrochemical techniques were used for investigating the activity of IRB as a promoter of local corrosion in presence of H 2 as electron donor. A local consumption of H 2 by the bacteria has been evidenced and impedance measurements indicate the formation of a thick layer of corrosion products.

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“…As a result of this legislation, inorganic and organic toxic wastes are no longer permitted to be discharged directly to sewers, with a resultant increased activity of microorganisms, particularly the SRBs, producing large quantities of H 2 S [49][50][51][52]. In addition to the sewers, concrete corrosion problems today involve highway bridges, aquaducts, water distribution systems for drinking and wastewater, historic buildings and monuments [53][54][55][56], river hydropower dams [57], and nuclear depositories [58,59] where corrosion rates are unacceptably high. The recognized failure of highways and bridges recently in developed countries has renewed the discussion on concrete corrosion and protection [60,61].…”

Section: B a Brief Historymentioning

confidence: 99%

Microbiological Corrosion of Concrete

Ford

Mitchell

2011

Uhlig's Corrosion Handbook

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Microbial analysis of samples from the tunnel sealing experiment at AECL’s Underground Research Laboratory

Cited by 34 publications

References 9 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

Influence of hydrogen-oxidizing bacteria on the corrosion of low carbon steel: Local electrochemical investigations

Microbiological Corrosion of Concrete

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