Microbial vanadate and nitrate reductions coupled with anaerobic methane oxidation in groundwater.

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ID: 53368
2019
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Abstract
Vanadate contaminant in groundwater receives increasing attentions, but little is known on its biogeochemical transformation with gaseous electron donors. This study investigated bio-reduction of vanadate coupled with anaerobic methane oxidation and its relationship with nitrate reduction. Results showed 95.8 ± 3.1% of 1 mM vanadate was removed within 7 days using methane as the sole electron donor. Tetravalent vanadium compounds were the main reduction products, which precipitated naturally in groundwater environment. The introduction of nitrate inhibited vanadate reduction, though both were reduced in parallel. Accumulations of volatile fatty acids (VFAs) were observed from methane oxidation. Preliminary microbial community structure and metabolite analyses indicated that vanadate was likely reduced via Methylomonas coupled with methane oxidation or through synergistic relationships between methane oxidizing bacteria and heterotrophic vanadate reducers with VFAs served as the intermediates.
Reference Key
zhang2019microbialjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhang, Baogang;Jiang, Yufeng;Zuo, Kuichang;He, Chao;Dai, Yunrong;Ren, Zhiyong Jason;
Journal Journal of hazardous materials
Year 2019
DOI
S0304-3894(19)31182-3
URL
Keywords
bioremediation groundwater methane bio-reduction vanadate

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