Sorption of Pu(IV) on biogenic Mn oxide and complexation of Pu(IV) with organic ligands secreted by fungal cells

被引：0

作者：

Tanaka, Kazuya ^{[1
]}

Tani, Yukinori ^{[2
]}

Kozai, Naofumi ^{[1
]}

Ohnuki, Toshihiko ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, 2-4 Shirakata, Tokai, Ibaraki 3191195, Japan

[2] Univ Shizuoka, Sch Food & Nutr Sci, Dept Environm & Life Sci, 52-1 Yada, Yada, Shizuoka 4228526, Japan

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2022年 / 331卷 / 02期

关键词：

Tetravalent actinides; Microbial activity; Solubilization; Sorption; Organic ligand; MANGANESE OXIDES; OXIDATION; MECHANISMS; SPECIATION; REDUCTION; KINETICS; URANIUM; NP(V);

D O I：

10.1007/s10967-021-08178-w

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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.

引用

页码：1109 / 1114

页数：6

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