Publication Date:
2006-10-28
Description:
Sorption of actinides, particularly plutonium, onto submicrometer-sized colloids increases their mobility, but these plutonium colloids are difficult to detect in the far-field. We identified actinides on colloids in the groundwater from the Mayak Production Association, Urals, Russia; at the source, the plutonium activity is approximately 1000 becquerels per liter. Plutonium activities are still 0.16 becquerels per liter at a distance of 3 kilometers, where 70 to 90 mole percent of the plutonium is sorbed onto colloids, confirming that colloids are responsible for the long-distance transport of plutonium. Nano-secondary ion mass spectrometry elemental maps reveal that amorphous iron oxide colloids adsorb Pu(IV) hydroxides or carbonates along with uranium carbonates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novikov, Alexander P -- Kalmykov, Stepan N -- Utsunomiya, Satoshi -- Ewing, Rodney C -- Horreard, Francois -- Merkulov, Alex -- Clark, Sue B -- Tkachev, Vladimir V -- Myasoedov, Boris F -- New York, N.Y. -- Science. 2006 Oct 27;314(5799):638-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow 119991, Russia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17068260" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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