Partitioning and speciation of Pu in the sedimentary rocks aquifer from the deep liquid nuclear waste disposalстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 5 мая 2015 г.
Аннотация:Plutoniumpartitioning and speciation was studied
under the conditions of a liquid nuclear waste repository
site. The dominating effect of corrosion products (Fe
and Cr) oxides on plutonium partitioning was established
in batch sorption tests at 150 ∘C and by using sequential
extraction. Various techniques includingMössbauer spectrometry,
XRD and TEM were used to characterize Fe/Cr
oxide phases that form both precipitates and surface coatings
which sorb plutonium. The sorption and speciation of
plutonium was modeled thermodynamically using Pourbaix
diagram that takes into account both surface complexation
reaction and precipitation of insoluble PuO2.