E-viri
Recenzirano
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Tanaka, Kazuya; Tani, Yukinori; Kozai, Naofumi; Ohnuki, Toshihiko
Journal of radioanalytical and nuclear chemistry, 02/2022, Letnik: 331, Številka: 2Journal Article
We investigated the sorption of Pu(IV) on biogenic Mn oxide, composed of Mn(IV) oxide and hyphae, produced by Mn(II)-oxidizing fungus. The sorption of Pu(IV) on biogenic Mn oxide was similar to that of U(VI) and different from that of Th(IV), possibly due to oxidation of Pu(IV) to Pu(VI). When Pu(IV) was sorbed on hyphae only, it was desorbed into the solution phase over time. Pu(IV) could be solubilized by complexation with organic ligands secreted by fungal cells. Furthermore, Pu(IV) desorption was observed especially under circumneutral pH conditions, indicating that Pu(IV) can be solubilized by microbial activity in most surface environments.
