Uranium (VI) reduction in a fixed-film reactor by a bacterial consortium isolated from uranium mining tailing heaps

Mtimunye, Phalazane Johanna; Chirwa, Evans M.N.

doi:10.1016/j.bej.2019.02.002

Cited by 13 publications

(1 citation statement)

References 35 publications

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“…In the control, the dominant genera were Arthrobacter (80.46%), Paenarthrobacter (8.27%), Rhodococcus (4.98%), Pseudomonas (2.16%), and Dyella (1.06%). The dominance of Arthrobacter, Rhodococcus, and Paenarthrobacter in the uranium-contaminated environment has been reported; these bacterial genera could remove uranium effectively [28,29]. During the remediation process, the diversity of treatment changed greatly, and the relative abundance of Rhodococcus and Paenarthrobacter gradually decreased and even disappeared.…”

Section: Dynamic Change Of Microbial Community At Genus Levelmentioning

confidence: 95%

Response and Dynamic Change of Microbial Community during Bioremediation of Uranium Tailings by Bacillus sp.

Tang

Zhong

et al. 2021

Minerals

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Bacillus sp. is widely used in the remediation of uranium-contaminated sites. However, little is known about the competitive process of microbial community in the environment during bioremediation. The bioremediation of uranium tailings using Bacillus sp. was explored, and the bacterial community was analyzed by high-throughput sequencing at different stages of remediation. Bacillus sp. reduced the leaching of uranium from uranium tailings. The lowest uranium concentration was 17.25 μg/L. Alpha diversity revealed that the abundance and diversity of microorganisms increased with the extension of the culture time. The microbial abundance and diversity were higher in the treatment group than in the control group. The dominant species at the phyla level were Firmicutes and Proteobacteria in the uranium tailings environment, whereas the phylum of Proteobacteria was significantly increased in the treatment group. Based on the genus level, the proportions of Arthrobacter, Rhodococcus and Paenarthrobacter decreased significantly, whereas those of Clostridium sp., Bacillus and Pseudomonas increased dramatically. Hence, the remediation of uranium contamination in the environment was due to the functional microorganisms, which gradually became the dominant strain in the treatment, such as Desulfotomaculum, Desulfosporporosinus, Anaerocolumna, Ruminiclostridium and Burkholderia. These findings provided a promising outlook of the potential for remediation strategies of soil contaminated by uranium. The dynamic characteristics of the microbial community are likely to provide a foundation for the bioremediation process in practice.

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Section: Dynamic Change Of Microbial Community At Genus Levelmentioning

confidence: 95%