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Minerals, Volume 14, Issue 2

February 2024 - 91 articles

Cover Story: The laboratory experiments focused on the enhanced alteration of Fe-bentonite in the context of a deep geological repository for high-level radioactive waste. The interaction of two different bentonites with FeCl2 powder was studied after 6 months of reaction. A dominant Na-Cl-SO4 saline solution was brought into contact with the compacted bentonites from above, while at the bottom a constant temperature was maintained by a heater in contact with the FeCl2 layer. A constant temperature gradient was created from 100 to 40 °C. The hydration caused the redistribution of aqueous species and the formation of secondary minerals. The graphical abstract shows the coating of bentonite by akaganeite (fibrous morphologies) and goethite (spicules) after 6 months of reactions. View this paper
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Minerals - ISSN 2075-163X