Autotrophic Vanadium(V) Bioreduction in Groundwater by Elemental Sulfur and Zerovalent Iron,Environmental Science & Technology

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Autotrophic Vanadium(V) Bioreduction in Groundwater by Elemental Sulfur and Zerovalent Iron
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-06-14 , DOI: 10.1021/acs.est.8b01317
Baogang Zhang _{1,

2} , Rui Qiu ₁ , Lu Lu ₂ , Xi Chen ₂ , Chao He ₁ , Jianping Lu ₁ , Zhiyong Jason Ren ₂

Affiliation

Vanadium (V) is an emerging contaminant in groundwater that can adversely affect human health. Although bioremediation has been shown effective, little is known on autotrophic V(V) bioreduction in the context of oligotrophic characteristics of groundwater. In this study, we demonstrate that efficient V(V) bioreductions can be coupled with bio-oxidation of elemental sulfur (S(0)) or zerovalent iron (Fe(0)), and the V(V) removal efficiencies reached 97.5 ± 1.2% and 86.6 ± 2.5% within 120 h using S(0) and Fe(0), respectively. V(IV) is the main reduction product and precipitates naturally in near-neutral conditions. Microbial community, functional gene, and metabolites analyses reveal that synthetic metabolisms among autotrophs and heterotrophs played major roles in V(V) reduction using S(0) and Fe(0). These results demonstrate a new approach for V(V) contaminated groundwater remediation.

中文翻译：

元素硫和零价铁对地下水的自养钒（V）生物还原

钒是地下水中的新兴污染物，会对人体健康产生不利影响。尽管已表明生物修复是有效的，但在地下水的贫营养特征的背景下，关于自养V（V）生物还原的了解还很少。在这项研究中，我们证明有效的V（V）生物还原可以与元素硫（S（0））或零价铁（Fe（0））的生物氧化结合，并且V（V）的去除效率达到97.5±使用S（0）和Fe（0）在120小时内分别达到1.2％和86.6±2.5％。V（IV）是主要的还原产物，在接近中性的条件下会自然沉淀。微生物群落，功能基因和代谢产物分析表明，自养生物和异养生物之间的合成代谢在使用S（0）和Fe（0）还原V（V）中起主要作用。

更新日期：2018-06-15

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