Kinetics and pH-dependent uranium bioprecipitation by Shewanella putrefaciens under aerobic conditions
Kinetics and pH-dependent uranium bioprecipitation by Shewanella putrefaciens under aerobic conditions
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有氧条件下腐败希瓦氏菌的动力学和 pH 依赖性铀生物沉淀
DOI：
10.1007/s10967-017-5261-7
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发表时间：
2017-06-01
影响因子：
1.6
通讯作者：
Sun, Shiyong
中科院分区：
文献类型：
--
作者：
Huang, Wenbo;Nie, Xiaoqin;Sun, Shiyong
研究了腐败希瓦氏菌对铀（VI）的去除行为。结果表明，在S.腐败菌在微酸性pH下发现层状黑云母，但在pH > 7.0时没有发现。红外光谱分析表明，含磷基团在黑云母的形成过程中起着关键作用。细菌介导的黑云母经灰化和水热处理后，可分别转化为无机磷酸铀和UO2。研究结果为好氧环境中铀的原位生物修复提供了一种潜在的策略。
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-2(UO2)(2)(PO4)(2)center dot 8H(2)O], 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 UO2, respectively. The findings can provide a potential strategy for in situ bioremediation of uranium in aerobic environment.