期刊
JOURNAL OF CONTAMINANT HYDROLOGY
卷 157, 期 -, 页码 87-105出版社
ELSEVIER
DOI: 10.1016/j.jconhyd.2013.11.004
关键词
Tetravalent actinides; Groundwater; Colloids; Nanoparticles; Subsurface transport
Tetravalent actinides, An(IV), are usually assumed to be little mobile in near-neutral environmental waters because of their low solubility. However, there are certain geochemical scenarios during which mobilization of An(IV) in a colloid-borne (waterborne) form cannot be ruled out A compilation of colloid-borne forms of tetravalent actinides described so far for laboratory experiments together with several examples of An(IV) colloids observed in field experiments and real-world scenarios are given. They are intended to be a knowledge base and a tool for those who have to interpret actinide behavior under environmental conditions. Synthetic colloids containing structural An(IV) and synthetic colloids carrying adsorbed An(IV) are considered. Their behavior is compared with the behavior of An(IV) colloids observed after the intentional or unintentional release of actinides into the environment A list of knowledge gaps as to the behavior of An(IV) colloids is provided and items which need further research are highlighted. (C) 2013 Elsevier B.V. All rights reserved.
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