Pu and Am sorption to the Baltic Sea bottom sediments

Title: Pu and Am sorption to the Baltic Sea bottom sediments

Author: G. Lujanienė, P. Beneš, K. Štamberg, K. Jokšas, I. Kulakauskaitė

Reference: Journal of Radioanalytical and Nuclear Chemistry , March 2013, Volume 295, Issue 3, pp 1957-1967

DOI: 10.1007/s10967-012-2281-1

Keywords: Pu(IV), Pu(V), Bottom sediments, Seawater, Sorption

Abstract: Sorption of Am and Pu isotopes to bottom sediments of the Baltic Sea has been studied under natural and laboratory conditions. Data obtained from sequential extraction, sorption of Am(III), Pu(IV) and Pu(V) as well as oxidation state distribution experiments have shown that Pu(V) sorption mechanism includes a very fast Pu(V) reduction (reaction rate ≤ 2.33 × 10⁻³ s⁻¹) to Pu(IV) by humic substances and/or by Fe(II) to Pu(IV) and partly to Pu(III). Following reduction Pu isotopes were bound to various components of bottom sediments via ion exchange and surface complexation reactions and a slow incorporation into the crystalline structure of Fe minerals. Kinetics experiments showed that the sorption of Pu(V), Pu(IV) and Am(III) to bottom sediments from natural seawater was controlled by the inert layer diffusion process.

ＵＲＬ：http://link.springer.com/article/10.1007/s10967-012-2281-1

キーワードタグ

前後へのリンク