Objective
The objective of the present work is to determine the global effect of microbial presence on the mobility of radionuclides supposedly immobilized in the near field (clay or cement).
Micro-organisms can produce organic or mineral acids that can promote corrosion and complexing agents that can modify the characteristics of the repository. So, radionuclides that have been immobilized by cement or bitumen embedding matrix can be leached either as soluble ions or soluble complexes (effects of the corrosion of the matrix). This leads to an increase of their mobility.
On the other hand, micro-organisms can decrease the mobility of initially soluble species by sorption on the cell membrane or on polymers (especially polysaccharides) produced by cells, and also by bioaccumulation in the cell.
Work programme:
The experiments are carried out on cylindrical samples of pure cement or on fine mote of clay, containing U (introduced as Uranyl nitrate) or Cs (introduced as Cesium chloride). The organic acid producing microorganisms growth on cellulose, one carbon source that can be found in nuclear waste.
The main headings of interest can be broken down to:
Literature survey
Pilot plant design and realization, hydraulic tests, choice of working conditions
Metabolism study of cellulolytic microorganisms
Leaching of U and Cs contained in cementitious or clay matrix by the culture medium containing microorganisms
Study of the different effects of direct and indirect microbial action on radionuclide mobility or retardation
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology other engineering and technologies nuclear engineering nuclear waste management
- natural sciences chemical sciences organic chemistry organic acids
- natural sciences biological sciences biochemistry biomolecules carbohydrates
- natural sciences biological sciences microbiology
- natural sciences chemical sciences nuclear chemistry radiation chemistry
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
13108 Saint-Paul-lez-Durance
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.