Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Freisetzung und Rückhaltung von Radionukliden in Systemen mit Zementphasen, Zuschlagstoffen und Tongestein.
Wolter, J.-M.; Philipp, T.; Schmeide, K.; Schymura, S.; Huittinen, N.; Stumpf, T.;
Leaching experiments of uranium(VI) and Cm(III) doped calcium-silicate-hydrate (CSH) phases with various calcium to silicon ratios were carried out in NaCl, NaCl/Na2SO4, NaCl/NaHCO3 and NaHCO3 containing solutions to study the time-dependent release of Ca, Si, U and Cm. Potential changes of the U(VI) and Cm(III)-CSH binding induced by leaching were monitored with time-resolved laser-induced fluorescence spectroscopy (TRLFS), infrared spectroscopy (IR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and powder X-ray diffraction (PXRD).
Furthermore, investigations of the Eu(III) sorption on Ca-bentonite in the presence of high ionic strengths and superplasticizer were carried out.
Additionally, the U(VI) binding to the Ca-bentonite surface in the hyper-alkaline pH region was studdied with EXAFS.
Keywords: Cm(III), U(VI), Eu(III), TRLFS, IR, EXAFS, PXRD, CSH, Ca-bentonite, NaCl, Na2SO4, NaHCO3, CaCl2
  • Lecture (others)
    6. Workshop des BMWi-Verbundvorhabens “Geochemische Radionuklidrückhaltung an Zementalterationsphasen (GRaZ)“, 25.-26.04.2018, Karlsruhe, Deutschland

Publ.-Id: 27425 - Permalink