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- Title
Kinetics and pH-dependent uranium bioprecipitation by Shewanella putrefaciens under aerobic conditions.
- Authors
Huang, Wenbo; Nie, Xiaoqin; Dong, Faqin; Ding, Congcong; Huang, Rong; Qin, Yilin; Liu, Mingxue; Sun, Shiyong
- Abstract
The removal behavior of U(VI) by Shewanella putrefaciens was investigated in this study. Our results demonstrated the formation of uranium phosphate biomineral, predominantly existed as chernikovite [H(UO)(PO)·8HO], on the cell surface of S. putrefaciens. The lamellar chernikovite was found at slightly acid pH, but not at pH > 7.0. Phosphate-containing groups played the key role in the formation of chernikovite based on the analysis of IR. After ashing and hydrothermal process, bacterially mediated chernikovite can be transformed into inorganic uranium phosphate and UO, respectively. The findings can provide a potential strategy for in situ bioremediation of uranium in aerobic environment. Graphical abstract: Biomineralization process of uranium on S. putrefaciens.
- Subjects
SHEWANELLA putrefaciens; URANIUM compounds; AEROBIC conditions (Biochemistry); BIOMINERALIZATION; BIOREMEDIATION
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2017, Vol 312, Issue 3, p531
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-017-5261-7