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URN (für Zitat) http://nbn-resolving.org/urn:nbn:de:swb:90-286961
Titel Structural Incorporation of Selenium into Pyrite and Mackinawite
Autor Diener, Alexander
Institution Institut für Mineralogie und Geochemie (IMG)
Dokumenttyp Buch
Verlag Karlsruhe
Jahr 2012
Hochschulschrift Dissertation
Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Institut für Mineralogie und Geochemie (IMG)
Prüfungsdaten: 06.06.2012
Referent/Betreuer: Prof. T. Neumann
Abstract Selenium has a radiotoxic potential as 79Se radionuclide if discharged from a high-level nuclear waste repository into the biosphere. We performed three different syntheses of selenium doted pyrite and examined the amount of incorporated Se as well as the structural bonding. The incorporated amount of Se is very high (>98%). The structural substitution of Se by S occurs only for high supersaturated solutions. Under anoxic and acidic conditions, the incorporation of Se(0) is more likely.