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Institute of Fusion Energy and Nuclear Waste Management – Nuclear Waste Management (IFN-2) (Forschungszentrum Jülich)
Experimental data for: Retention of 226Ra in the sandy Opalinus Clay facies from the Mont Terri rock laboratory, Switzerland
Version 1.0
Ait Mouheb, Naila; Yang, Yuankai; Deissmann, Guido; Klinkenberg, Martina; Poonoosamy, Jenna; Vinograd, Victor; Van Loon, Luc R.; Bosbach, Dirk, 2023, "Experimental data for: Retention of 226Ra in the sandy Opalinus Clay facies from the Mont Terri rock laboratory, Switzerland", https://doi.org/10.26165/JUELICH-DATA/IFD1I9, Jülich DATA, V1
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Description
In this study, we report results of the impact of the natural heterogeneity of sandy facies of the Opalinus clay (OPA-SF) on 226Ra uptake in drill core (BAD 1) samples from the Mont Terri underground rock laboratory. The samples were carefully characterized with respect to mineralogy and chemistry using, e.g., XRD and SEM/EDS. The uptake behaviour of 226Ra is evaluated using batch sorption experiments. This dataset contains experimental data on a) 226Ra sorption kinetics and 226Ra sorption on sandy Opalinus Clay as a function of the S/L ratio, b) the characterization of the mineralogical composition of rock samples and the different pore-waters in equilibrium with each clay sample, c) a representation of the mineralogical composition of rock samples in a ternary diagram QFM (quartz, feldspar, and mica), and d) calculated speciation of 226Ra and saturation indices (SI) for Ra-phases in synthetic Opalinus Clay pore water and predicted mole fractions of BaSO4 and SrSO4 in (Sr,Ba)SO4 celestine solid solutions. (2023-09-18)
Subject Earth and Environmental Sciences
Institute IEK-6
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Calculated speciation of 226Ra.xlsx
MS Excel Spreadsheet - 10.1 KB - Oct 10, 2023 - 1 Download
SHA-256: 3fe34398a94338c247459461879624fcfeb90df747203b16e645d6ac74d6ade2
Table A2. Calculated speciation of 226Ra (CRa = 2·10-8 mol L-1) and saturation indices (SI) for Ra-phases in synthetic Opalinus Clay pore water after Pearson (1998).
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Experimental data of 226Ra sorption kinetics.xlsx
MS Excel Spreadsheet - 11.2 KB - Oct 10, 2023 - 8 Downloads
SHA-256: 01f2a3b2a3d71435aa89cb61e48b33b7d76370ce3c3c45903fef266bb61fb062
Table A5. Experimental data of 226Ra sorption kinetics on sandy Opalinus Clay at pH 7.6 and I = 0.39 mol·L-1 (cf. Fig. 9).
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Experimental data of 226Ra sorption on sandy Opalinus Clay as a function of the S-L ratio
MS Excel Spreadsheet - 10.3 KB - Oct 10, 2023 - 5 Downloads
SHA-256: 68ea1268ce1e355179728d875aa303a5a1316a96154d05cd21dd166fa15014f8
Table A6 . Experimental data of 226Ra sorption on sandy Opalinus Clay as a function of the S/L ratio at pH 7.6 and I = 0.39 mol·L-1 (cf. Fig. 12).
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Mineralogical composition (in wt.%) of rock samples.xlsx
MS Excel Spreadsheet - 10.7 KB - Oct 10, 2023 - 4 Downloads
SHA-256: b269d5b09fae86ae8bb6cb432ec76b92e1ccb8c955fe4fa185d0106f17958476
Table A3. Mineralogical composition (in wt.%) of rock samples from the lower sandy facies of the Opalinus Clay at Mont Terri taken from drill cores BDB-1 (Lerouge et al., 2015; Waber and Rufer, 2017) and BWS-H (Houben et al., 2014).
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Pore water composition.xlsx
MS Excel Spreadsheet - 10.3 KB - Oct 10, 2023 - 1 Download
SHA-256: 87256c87ca8ef13bd5996f8c3b1dcd6b27a3a728766bbf2e022f68ba0ddfff01
Table A1. Chemical composition (mol·L-1) of the different pore-waters in equilibrium with each clay sample and used in the sorption experiments in comparison to the synthetic Opalinus Clay pore water after Pearson (1998).
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Predicted mole fractions of BaSO4 and SrSO4.docx
MS Word - 21.0 KB - Oct 10, 2023 - 2 Downloads
SHA-256: 743b8a35fa0eccd586baabe0538b3916c658ea3027a60d42db0afb64222956eb
Figure A2. Predicted mole fractions of BaSO4 and SrSO4 in (Sr,Ba)SO4 celestite solid solution, whose fraction in the system is fixed at 0.4 wt. % of the total solid.
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Representation of the mineralogical composition of rock samples.docx
MS Word - 330.5 KB - Oct 10, 2023 - 3 Downloads
SHA-256: c5d4953e1df4cf6111f43daa20b3527a97c4b2d67c57f584365f342ef0aabdb4
Figure A1. (Left) Representation of the mineralogical composition of rock samples from the lower sandy Opalinus Clay facies from drill core BAD-1 in a ternary diagram QFM (quartz, feldspar, and mica) – clay minerals – carbonates; (Right) lithotype classification of organic mudstones based on their mineralogical composition after Gamero-Diaz et al. (2013) and Glaser et al. (2014).
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Result of EDS spot analyses of (Ba, Sr)-sulphate.xlsx
MS Excel Spreadsheet - 9.5 KB - Oct 10, 2023 - 2 Downloads
SHA-256: df39db1e70cb4d95f48de2e93ca0d699f53a84b4125dfddcc9efd8a1d574bb58
Table A4. Result of EDS spot analyses of (Ba, Sr)-sulphate from the lower sandy Opalinus Clay facies (cf. Fig. 8).
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