This title appears in the Scientific Report : 2014 

A thermodynamic adsorption/entrapment model for selenium(IV) coprecipitation with calcite
Heberling, Frank (Corresponding Author)
Vinograd, Victor / Polly, Robert / Gale, Julian D. / Heck, Stephanie / Rothe, Jörg / Bosbach, Dirk / Geckeis, Horst / Winkler, Björn
Nukleare Entsorgung und Reaktorsicherheit; IEK-6
Geochimica et cosmochimica acta, 134 (2014) S. 16 - 38
New York, NY [u.a.] Elsevier 2014
10.1016/j.gca.2014.02.044
Journal Article
Safety Research for Nuclear Waste Disposal
Please use the identifier: http://dx.doi.org/10.1016/j.gca.2014.02.044 in citations.
Selenium is an environmentally relevant trace element, while the radioisotope 79Se is of particular concern in the context of nuclear waste disposal safety. Oxidized selenium species are relatively soluble and show only weak adsorption at common mineral surfaces. However, a possible sorption mechanism for selenium in the geosphere is the structural incorporation of selenium(IV) (selenite, SeO32−) into calcite (CaCO3).In this study we investigate the interactions between selenite and calcite by a series of experimental and computational methods with the aim to quantify selenite incorporation into calcite at standard conditions. We further seek to describe the thermodynamics of selenite-doped calcite, and selenite coprecipitation with calcite.