铀尾渣库区微生物群落特征及污染物迁移扩散机理

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Abstract A typical uranium tailings reservoir in northern China was selected to investigate correlations and mechanism between microbial community characteristics and pollutant migration and diffusion by 16s rRNA high-throughput sequencing, XRD and FTIR. The results showed that microbial diversity in the uranium tailings was generally lower than that in the surrounding soils. The dominant bacteria, such as Proteobacteria, Bacteroidetes, and Cyanobacteria Chloroplast, were significantly negatively correlated to the contaminant diffusion, uranium (U) was one of key factors affecting the succession of microbial communities in this region, which was more likely to occur in large tailings particles with higher uranium levels. Meanwhile, the traditional lime neutralization process promoted the U-Ca agglomeration effect, resulting in 54.84% of more than 1.7mm particle size in the uranium tailings; because the large size uranium tailings lacked mineral carriers (such as feldspar and clay minerals) that could support the microbial community and functional group structures with biological affinity. Finally, the radioactive exposure and natural hydraulic erosion exacerbated the unstable evolution of the microbial community, making the pollutants in uranium tailings be more prone to release.

Key words： uranium mine tailings microbial community high throughput sequencing uranium pollution biodiversity

Received: 27 September 2022

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X53

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	AN Yi-fu
	LIAN Guo-xi
	WU Xu-yang
	SUN Juan
	GAO Yang
	SONG Wang-wang

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AN Yi-fu,LIAN Guo-xi,WU Xu-yang等. Microbial community characteristics and mechanism of pollutant migration and diffusion in uranium tailings reservoir area[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(5): 2632-2639.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I5/2632

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