Experimental Speciation of Plutonium(IV) in Natural Seawater
Résumé
Solubility, migration, and bioavailability of plutonium is lacunar because experimental evidences are missing. We report here on X-ray Absorption Spectroscopy of plutonium in natural seawater. The observed valence state is +IV and its speciation corresponds to PuO2 type colloids. Furthermore, aging of the solution shows a gradient of ordering from hydroxide colloidal species to more crystalline PuO2 colloids.
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