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Analysis of uranium removal capacity of anaerobic granular sludge bacterial communities under different initial pH conditions

  • Taotao ZengEmail author
  • Licheng Li
  • Guanhai Mo
  • Guohua Wang
  • Haiyan Liu
  • Shuibo XieEmail author
Research Article

Abstract

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.

Keywords

Bacterial community Uranium removal Anaerobic granular sludge pH 

Notes

Funding information

This research was jointly supported by the National Natural Science Foundation of China (51408293 and 11475080), the Foundation of China Scholarship Council (201608430243) and the Project of Young Scholar in Hunan Province of 2018.

Supplementary material

11356_2018_4017_MOESM1_ESM.doc (798 kb)
ESM 1 (DOC 798 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Hunan Province Key Laboratory of Pollution Control and Resources Reuse TechnologyUniversity of South ChinaHengyangPeople’s Republic of China
  2. 2.Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and HydrometallurgyUniversity of South ChinaHengyangPeople’s Republic of China

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