VVReduction by Polaromonas spp. In Vanadium Mine Tailings

Xiaoxu Sun, Lang Qiu, Max Kolton, Max Häggblom, Rui Xu, Tianle Kong, Pin Gao, Baoqin Li, Chengjian Jiang, Weimin Sun

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Vanadium (V) is an important metal with critical industrial and medical applications. Elevated V contamination, however, can be a threat to the environment and human health. Microorganisms can reduce the more toxic and mobile VV to the less toxic and immobile VIV, which could be a detoxification and energy metabolism strategy adopted by V-reducing bacteria (VRB). The limited understanding of microbial responses to V contamination and the mechanisms for VV reduction, however, hamper our capability to attenuate V contamination. This study focused on determining the microbial responses to elevated V concentration and the mechanisms of VV reduction in V tailings. The bacterial communities were characterized and compared between the V tailings and the less contaminated adjacent mineral soils. Further, VV-reducing enrichments indicated that bacteria associated with Polaromonas, a genus belonging to the family Burkholderiaceae, were potentially responsible for VV reduction. Retrieved metagenome-assembled genomes (MAGs) suggested that the Polaromonas spp. encoded genes (cymA, omcA, and narG) were responsible for VV reduction. Additionally, Polaromonas spp. was metabolically versatile and could use both organic and inorganic electron donors. The metabolic versatility of Polaromonas spp. may be important for its ability to flourish in the V tailings.

Original languageEnglish (US)
Pages (from-to)14442-14454
Number of pages13
JournalEnvironmental Science and Technology
Volume54
Issue number22
DOIs
StatePublished - Nov 17 2020

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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