Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China.
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Feb;26(6):5613-5622. doi: 10.1007/s11356-018-4017-4. Epub 2019 Jan 5.
The bacterial community of an anaerobic granular sludge associated with uranium depletion was investigated following its exposure to uranium under different initial pH conditions (pH 4.5, 5.5, and 6.5). The highest uranium removal efficiency (98.1%) was obtained for the sample with an initial pH of 6.5, which also supported the highest bacterial community richness and diversity. Venn diagrams visualized the decrease in the number of genera present in both the inoculum and the uranium-exposed biomass as the initial pH decreased from 6.5 to 4.5. Compared with the inoculum, a significant increase in the abundances of the phyla Chloroflexi and Proteobacteria was observed following uranium exposure. At initial pH conditions of 6.5 to 4.5, the proportions of the taxa Anaerolineaceae, Chryseobacterium, Acinetobacter, Pseudomonas, and Sulfurovum increased significantly, likely contributing to the observed uranium removal. Uranium exposure induced a greater level of dynamic diversification of bacterial abundances than did the initial pH difference.
研究了在不同初始 pH 值条件（pH 4.5、5.5 和 6.5）下，与铀耗尽相关的厌氧颗粒污泥中的细菌群落暴露于铀后的变化。初始 pH 值为 6.5 的样品的铀去除效率最高（98.1%），同时支持了最高的细菌群落丰富度和多样性。Venn 图可视化了随着初始 pH 值从 6.5 降低到 4.5，接种物和暴露于铀的生物量中存在的属数量减少。与接种物相比，在暴露于铀后，观察到绿弯菌门和变形菌门的丰度显著增加。在初始 pH 值为 6.5 到 4.5 的条件下，Anaerolineaceae、Chryseobacterium、Acinetobacter、Pseudomonas 和 Sulfurovum 类群的比例显著增加，可能有助于观察到的铀去除。铀暴露引起的细菌丰度动态多样化程度大于初始 pH 值差异。
