@inbook{04d7564cfa5448e1857a52145f747d1f,
title = "Formation of (Ba,Ra)SO4 Solid solutions – Results from barite (re)precipitation and coprecipitation experiments",
abstract = "Retention of 226Ra2+ by barite in aqueous solution is studied in a barite (re)precipitation experiment with 226Ra2+ doped barite suspensions at I = 0.1 mol·(kg H2O)–1 at ambient temperature. After about two years a steady state is achieved, demonstrating that 226Ra2+(aq) concentration is controlled by the solubility of a (Ba,Ra)SO4 solid solution and several orders of magnitude below the Ra2+ solubility with respect to a pure RaSO4(s) endmember. Results of the barite (re)precipitation experiment are compared to recent (Ba,Ra)SO4 coprecipitation experiments by Rosenberg and co-workers at ionic strength I = 0.7 – 7.0 mol·(kg H2O)−1.",
keywords = "High Level Waste, Ideal Solid Solution, Pitzer Parameter, Precipitation Experiment, Solid Solution Composition",
author = "Volker Metz and Rosenberg, {Yoav O.} and Dirk Bosbach and Melanie B{\"o}ttle and Jiwchar Ganor",
note = "Funding Information: Bohnert, C. Bube, A. Bluss, T. Kisely, K. Scheubeck and E. Soballa for analytical and technical assistance during the study. The research leading to these results has been financially supported in part from Svensk K{\"a}rnbr{\"a}nslehantering AB within the project “Experimental study on Ra2+ uptake by barite (BaSO4) – Kinetics of solid solution formation via BaSO4 dissolution and RaxBa1xSO4 (re)precipitation” and from the European Atomic Energy Community Seventh Framework Programme, topic Fission-2010-1.1.2, Collaborative Project SKIN “Slow processes in close to equilibrium conditions of radionuclides in water/solid systems of relevance to nuclear waste management”. Funding Information: The authors would like to thank our colleagues at INE, in particular to E. Bohnert, C. Bube, A. Bluss, T. Kisely, K. Scheubeck and E. Soballa for analytical and technical assistance during the study. The research leading to these results has been financially supported in part from Svensk K?rnbr?nslehantering AB within the project ?Experimental study on Ra2+ uptake by barite (BaSO4) ? Kinetics of solid solution formation via BaSO4 dissolution and RaxBa1-xSO4 (re)precipitation? and from the European Atomic Energy Community Seventh Framework Programme, topic Fission-2010-1.1.2, Collaborative Project SKIN ?Slow processes in close to equilibrium conditions of radionuclides in water/solid systems of relevance to nuclear waste management?. Publisher Copyright: {\textcopyright} Springer-Verlag Berlin Heidelberg 2011.",
year = "2012",
month = jan,
day = "1",
doi = "10.1007/978-3-642-22122-4_73",
language = "English",
series = "Springer Geology",
publisher = "Springer",
pages = "635--642",
booktitle = "Springer Geology",
}