Uptake of chloride and carbonate ions by calcium monosulfoaluminate hydrate

Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2012.05.012· OSTI ID:21596978

Mesbah, Adel ^[1]; Cau-dit-Coumes, Celine ^[1]; Renaudin, Guillaume ^[2]; Frizon, Fabien ^[1]; Leroux, Fabrice ^[3]

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1. Commissariat a l'Energie Atomique et aux Energies Alternatives, CEA DEN/DTCD/SPDE, F-30207 Bagnols sur Ceze (France)
2. Clermont Universite, ENSCCF, Laboratoire des Materiaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand (France)
3. Clermont Universite, Universite Blaise Pascal, Laboratoire des Materiaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand (France)

Decommissioning of old nuclear reactors may produce waste streams containing chlorides and carbonates, including radioactive {sup 36}Cl{sup -} and {sup 14}CO{sub 3}{sup 2-}. Their insolubilization by calcium monosulfoaluminate hydrate was investigated. Carbonates were readily depleted from the solution, giving at thermodynamic equilibrium monocarboaluminate, monocarboaluminate + calcite, or calcite only, depending on the initial ratio between the anion and calcium monosulfoaluminate hydrate. Chloride ions reacted more slowly and were precipitated as Kuzel's salt, Kuzel's and Friedel's salts, or Friedel's salt only. Rietveld refinement of X-Ray powder diffraction patterns was successfully used to quantify the phase distributions, which were compared to thermodynamic calculations. Moreover, analysing the lattice parameters of Kuzel's salt as a function of its chloride content showed the occurrence of a restricted solid solution towards the sulfate side with general formula 3CaO{center_dot}Al{sub 2}O{sub 3}{center_dot}xCaCl{sub 2}{center_dot}(1 - x)CaSO{sub 4}{center_dot}(12 - 2x){center_dot}H{sub 2}O (0.36 {<=} x {<=} 0.50).

• OSTI ID: 21596978
• Journal Information: Cement and Concrete Research, Vol. 42, Issue 8; Other Information: DOI: 10.1016/j.cemconres.2012.05.012; PII: S0008-8846(12)00129-9; Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CALCITE
CALCIUM SULFATES
CARBON 14
CARBONATES
CHLORIDES
CHLORINE 36
DECOMMISSIONING
HYDRATES
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTES
SOLID SOLUTIONS
WATER
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON ISOTOPES
CARBONATE MINERALS
CHALCOGENIDES
CHLORINE COMPOUNDS
CHLORINE ISOTOPES
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
HALIDES
HALOGEN COMPOUNDS
HOMOGENEOUS MIXTURES
HYDROGEN COMPOUNDS
ISOTOPES
LIGHT NUCLEI
MANAGEMENT
MATERIALS
MINERALS
MIXTURES
NUCLEI
ODD-ODD NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOISOTOPES
SCATTERING
SOLUTIONS
SULFATES
SULFUR COMPOUNDS
WASTE MANAGEMENT
WASTES
YEARS LIVING RADIOISOTOPES