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- Title
Oxyhydroxy Silicate Colloids: A New Type of Waterborne Actinide(IV) Colloids.
- Authors
Zänker, Harald; Weiss, Stephan; Hennig, Christoph; Brendler, Vinzenz; Ikeda‐Ohno, Atsushi
- Abstract
At the near-neutral and reducing aquatic conditions expected in undisturbed ore deposits or in closed nuclear waste repositories, the actinides Th, U, Np, and Pu are primarily tetravalent. These tetravalent actinides (AnIV) are sparingly soluble in aquatic systems and, hence, are often assumed to be immobile. However, AnIV could become mobile if they occur as colloids. This review focuses on a new type of AnIV colloids, oxyhydroxy silicate colloids. We herein discuss the chemical characteristics of these colloids and the potential implication for their environmental behavior. The binary oxyhydroxy silicate colloids of AnIV could be potentially more mobile as a waterborne species than the well-known mono-component oxyhydroxide colloids.
- Subjects
SILICATES; OXYGEN compounds; SILICON compounds; ACTINIDE elements; HEAVY elements
- Publication
ChemistryOpen, 2016, Vol 5, Issue 3, p174
- ISSN
2191-1363
- Publication type
Article
- DOI
10.1002/open.201500207