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·¨¹ú²©ºóְλ Radionuclides
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post-doctoral position£º « retention of radionuclides on clay rocks in presence of mixed organic plumes. » des-service d¨¦tude du comportement des radionucl¨¦ides, paris-saclay university, cea, f-91191 gif-sur-yvette. the fate of chemicals in the environment is of importance in many industrial fields: soil, water, remediation, etc. in the context of waste management, significant researches focus on migration in natural media. the french radioactive waste management agency (andra) supports such investigations on clay rocks for geological disposals, which is the purpose of the present offer. recent studies from our laboratory deal with radionuclides retention, for example within near field perturbations of disposal [1]. complementary developments were made to quantify migration of organic compounds [2,3]. andra recently pointed out some lacks of experimental data on specific conditions. the proposed work will focus on these specific elements, e.g. ni(ii), am(iii), in presence of mixed organic plumes (e.g. tributylphosphate with or without edta, etc.). among the points of interest, the work will assess synergistic effects between organic compounds and perturbations induced on the media. the potential implications on radionuclides speciation and retention will be assessed by both experimental and modelling tools. the post-doc is hosted in the french alternative energies and atomic energy commission (cea), which is affiliated to paris-saclay university. the work will be performed in the physcial chemistry department from the energy division. [1] fralova et al. 2021. effect of organic compounds on the retention of radionuclides in clay rocks: mechanisms and specificities of eu(iii), th(iv), and u(vi). applied geochemistry, 104859. [2] dagnelie et al. 2018. diffusion of organic anions in clay-rich media: retardation and effect of anion exclusion. chemosphere, 213, 472-480. [3] guo et al., 2021. mobility of organic compounds in a soft clay-rich rock (t¨¦gulines clay, france). chemosphere, 275, 130048. applicant profile: phd thesis in physical- or radio-chemistry, geology, etc. experimentalist, comfortable with the use of radioactive tracers. practice of phreeqc and or thermodynamic databases would be a plus. curious and motivated by the main topics of our institute: energy, environment, waste management. fluent in english. workplace / location: cea, saclay center, 91191 gif-sur-yvette, france. availability / duration: 12-18 months, mid-2022 - 2023 contact: romain v.h. dagnelie, cea, universit¨¦ paris-saclay, romain.dagnelie@cea.fr application letter, curriculum vitae and references should be send ideally before march 2022. |
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