Home Reproducibility of the uptake of U(VI) onto degraded cement pastes and calcium silicate hydrate phases
Article
Licensed
Unlicensed Requires Authentication

Reproducibility of the uptake of U(VI) onto degraded cement pastes and calcium silicate hydrate phases

  • I. Pointeau , Catherine Landesman , E. Giffaut and Pascal Reiller
Published/Copyright: September 25, 2009
Radiochimica Acta
From the journal Radiochimica Acta Volume 92 Issue 9-11

Abstract

The U(VI) uptake in degraded cement pastes was undertaken in the laboratories of CEA/L3MR and SUBATECH in order to check the reproducibility of the study. Two well hydrated cement pastes, CEM I (Ordinary Portland Cement, OPC) and CEM V (blast furnace slag (BFS) and fly ash added to OPC) were degraded using similar protocols. Equilibrium solutions and solid materials were characterised for three degradation states for each paste. All samples are free of portlandite and the pH of the equilibrated cement solutions vary in the range 9.8-12.2. Three calcium silicate hydrate phases (C-S-H) were synthesised in order to compare the sorption properties of degraded cement pastes and of hydrate phases in similar pH conditions. In order to avoid precipitation processes, the operational solubility limit was evaluated before batch experiments. These solubility values vary significantly in the pH range [9-13] with a 2.4×10-7 mol L-1 minimum at pH close to 10.5. In batch sorption experiments, the distribution ratio Rd values are high: 3×104-1.5×105 mL g-1. The uptake of U(VI) increases when comparing the least and the most degraded cement pastes whereas the initial composition of cement has relatively insensitive effect. Sorption isotherms, expressed as a log[U(VI)solid]/log [U(VI)solution] plots are linear. A slope of 1 is calculated indicating the predominance of sorption processes. As sorption and desorption values are close, the uptake mechanism seems reversible. The Rd values measured in C-S-H suspensions are in good agreement with Rd values of degraded cement pastes, and C-S-H materials could be one of the cementitious phases which control U(VI) uptake in cement pastes.

Published Online: 2009-9-25
Published in Print: 2004-11-1

© 2004 Oldenbourg Wissenschaftsverlag GmbH

Articles in the same Issue

  1. Preface: Migration Conference 2003
  2. Actinide chemistry: from weapons to remediation to stewardship
  3. Thermodynamics and solubility of (UxNp1-x)O2(am) solid solution in the carbonate system
  4. Solubility and colloid formation of Th(IV) in concentrated NaCl and MgCl2 solution
  5. Effect of reducing agents on the uranium concentration above uranium(IV) amorphous precipitate in Boom Clay pore water
  6. On Mo-Ru-Tc-Pd-Rh-Te alloy particles extracted from spent fuel and their leaching behavior under Ar and H2 atmospheres
  7. Modeling of the complex formation of metal ions with humic acids
  8. Application of the NICA-Donnan model for proton, copper and uranyl binding to humic acid
  9. Protonation and complexation of isosaccharinic acid with U(VI) and Fe(III) in acidic solutions: potentiometric and calorimetric studies
  10. Carbonate complexation of neptunium(IV) in highly basic solutions
  11. Fluorescence characteristics of complex formation of europium(III)-salicylate
  12. The reduction of U(VI) by near field hydrogen in the presence of UO2(s)
  13. Electrochemical aspects of radiolytically enhanced UO2 dissolution
  14. Effect of alpha radiolysis on doped UO2 dissolution under reducing conditions
  15. The redox behaviour of plutonium in humic rich groundwater
  16. The fate of radiolytic oxidants during spent fuel leaching in the presence of dissolved near field hydrogen
  17. Structural changes of uranyl moiety with reduction from U(VI) to U(V)
  18. Trivalent actinide coprecipitation with powellite (CaMoO4): Secondary solid solution formation during HLW borosilicate-glass dissolution
  19. Reproducibility of the uptake of U(VI) onto degraded cement pastes and calcium silicate hydrate phases
  20. Uranium adsorption on weathered schist – intercomparison of modelling approaches
  21. Contribution of minerals to the sorption of U(VI) on granite
  22. Distribution and geochemical association of actinides in a contaminated soil as a function of grain size
  23. Interactions between anionic complex species of actinides and negatively charged mineral surfaces
  24. Measurements and modelling of Pm sorption onto TiO2 and goethite
  25. Effect of humic acid on the sorption of Cm(III) onto γ-Al2O3 studied by the time-resolved laser fluorescence spectroscopy
  26. Am(III) and Eu(III) uptake on hematite in the presence of humic acid
  27. Luminescence properties of tetravalent uranium in aqueous solution
  28. Scanning transmission X-ray microscopy as a speciation tool for natural organic molecules
  29. Formation of hydroxyapatite in soils using calcium citrate and sodium phosphate for control of strontium migration
  30. Influence of humic substances on the 63Ni migration through crushed rock media
  31. U, Th, Eu and colloid mobility in a granite fracture under near-natural flow conditions
  32. Sorption behavior of europium(III) and curium(III) on the cell surfaces of microorganisms
  33. Interactions of trivalent and tetravalent heavy metal-siderophore complexes with Pseudomonas fluorescens
  34. In-situ diffusion of HTO, 22Na+, Cs+ and I- in Opalinus Clay at the Mont Terri underground rock laboratory
  35. Results of the colloid and radionuclide retention experiment (CRR) at the Grimsel Test Site (GTS), Switzerland – impact of reaction kinetics and speciation on radionuclide migration
  36. Fracture flow and radionuclide transport in block-scale laboratory experiments
  37. Comparison between in situ and laboratory diffusion studies of HTO and halides in Opalinus Clay from the Mont Terri
  38. Solubility constraints on uranium concentrations in groundwaters of the Tono uranium deposit, Japan
  39. Mobility of uranium in tertiary argillaceous sediments – a natural analogue study
  40. Redistribution of U, Pb and REE in association with alteration of uranium minerals from the Koongarra deposit, Northern Territory, Australia
  41. Towards a common thermodynamic database for speciation models
  42. Geochemically derived non-gaseous radionuclide source term for the Asse salt mine – assessment for the use of a Mg(OH)2-based backfill material
  43. Simulation of remediation alternatives for a 137Cs contaminated soil
  44. Simulating reactive transport in time dependent multiphase flow problems
  45. Reactive transport modelling of a spent fuel repository in a stiff clay formation considering excavation damaged zones
  46. Coupled transport/reaction modelling of copper canister corrosion aided by microbial processes
https://doi.org/10.1524/ract.92.9.645.55008

Articles in the same Issue

  1. Preface: Migration Conference 2003
  2. Actinide chemistry: from weapons to remediation to stewardship
  3. Thermodynamics and solubility of (UxNp1-x)O2(am) solid solution in the carbonate system
  4. Solubility and colloid formation of Th(IV) in concentrated NaCl and MgCl2 solution
  5. Effect of reducing agents on the uranium concentration above uranium(IV) amorphous precipitate in Boom Clay pore water
  6. On Mo-Ru-Tc-Pd-Rh-Te alloy particles extracted from spent fuel and their leaching behavior under Ar and H2 atmospheres
  7. Modeling of the complex formation of metal ions with humic acids
  8. Application of the NICA-Donnan model for proton, copper and uranyl binding to humic acid
  9. Protonation and complexation of isosaccharinic acid with U(VI) and Fe(III) in acidic solutions: potentiometric and calorimetric studies
  10. Carbonate complexation of neptunium(IV) in highly basic solutions
  11. Fluorescence characteristics of complex formation of europium(III)-salicylate
  12. The reduction of U(VI) by near field hydrogen in the presence of UO2(s)
  13. Electrochemical aspects of radiolytically enhanced UO2 dissolution
  14. Effect of alpha radiolysis on doped UO2 dissolution under reducing conditions
  15. The redox behaviour of plutonium in humic rich groundwater
  16. The fate of radiolytic oxidants during spent fuel leaching in the presence of dissolved near field hydrogen
  17. Structural changes of uranyl moiety with reduction from U(VI) to U(V)
  18. Trivalent actinide coprecipitation with powellite (CaMoO4): Secondary solid solution formation during HLW borosilicate-glass dissolution
  19. Reproducibility of the uptake of U(VI) onto degraded cement pastes and calcium silicate hydrate phases
  20. Uranium adsorption on weathered schist – intercomparison of modelling approaches
  21. Contribution of minerals to the sorption of U(VI) on granite
  22. Distribution and geochemical association of actinides in a contaminated soil as a function of grain size
  23. Interactions between anionic complex species of actinides and negatively charged mineral surfaces
  24. Measurements and modelling of Pm sorption onto TiO2 and goethite
  25. Effect of humic acid on the sorption of Cm(III) onto γ-Al2O3 studied by the time-resolved laser fluorescence spectroscopy
  26. Am(III) and Eu(III) uptake on hematite in the presence of humic acid
  27. Luminescence properties of tetravalent uranium in aqueous solution
  28. Scanning transmission X-ray microscopy as a speciation tool for natural organic molecules
  29. Formation of hydroxyapatite in soils using calcium citrate and sodium phosphate for control of strontium migration
  30. Influence of humic substances on the 63Ni migration through crushed rock media
  31. U, Th, Eu and colloid mobility in a granite fracture under near-natural flow conditions
  32. Sorption behavior of europium(III) and curium(III) on the cell surfaces of microorganisms
  33. Interactions of trivalent and tetravalent heavy metal-siderophore complexes with Pseudomonas fluorescens
  34. In-situ diffusion of HTO, 22Na+, Cs+ and I- in Opalinus Clay at the Mont Terri underground rock laboratory
  35. Results of the colloid and radionuclide retention experiment (CRR) at the Grimsel Test Site (GTS), Switzerland – impact of reaction kinetics and speciation on radionuclide migration
  36. Fracture flow and radionuclide transport in block-scale laboratory experiments
  37. Comparison between in situ and laboratory diffusion studies of HTO and halides in Opalinus Clay from the Mont Terri
  38. Solubility constraints on uranium concentrations in groundwaters of the Tono uranium deposit, Japan
  39. Mobility of uranium in tertiary argillaceous sediments – a natural analogue study
  40. Redistribution of U, Pb and REE in association with alteration of uranium minerals from the Koongarra deposit, Northern Territory, Australia
  41. Towards a common thermodynamic database for speciation models
  42. Geochemically derived non-gaseous radionuclide source term for the Asse salt mine – assessment for the use of a Mg(OH)2-based backfill material
  43. Simulation of remediation alternatives for a 137Cs contaminated soil
  44. Simulating reactive transport in time dependent multiphase flow problems
  45. Reactive transport modelling of a spent fuel repository in a stiff clay formation considering excavation damaged zones
  46. Coupled transport/reaction modelling of copper canister corrosion aided by microbial processes
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Have an idea on how to improve our website?
Please write us.
© 2025 De Gruyter Brill
Downloaded on 28.9.2025 from https://www.degruyterbrill.com/document/doi/10.1524/ract.92.9.645.55008/html
Scroll to top button