School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China.
School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China.
Chemosphere. 2022 Feb;288(Pt 2):132539. doi: 10.1016/j.chemosphere.2021.132539. Epub 2021 Oct 11.
Uranium and vanadium commonly co-exist in groundwater aquifer where uranium was smelted from vanadium tailings. However, little is known about interrelationships of U(VI) and V(V) during their bio-reduction processes. In this work, 92.7 ± 1.52% U(VI) and 100% V(V) were simultaneously removed with sodium acetate as the sole exogenous electron donor and carbon source under anaerobic condition. Various conditions (i.e., increased uranium, reduced hydraulic retention time and acetate) were observed to affect removal efficiencies. Characterization of column fillings indicated that U(VI) was precipitated to U(IV) and V(V) was reduced to insoluble V(IV). Microbial community structure was observed to change, where Aquabacterium and Hydrogenophaga promoted bioreductions of U(VI) and V(V). Enriched Novosphingobium and Rhodobacter also played a vital role in reducing U(VI) and V(V). These findings could be used to study the biogeochemical fates of U(VI) and V(V) in the aquifer and to remediate groundwater co-contaminated by U(VI) and V(V).
铀和钒通常共存于地下水含水层中，铀是从钒尾矿中提炼出来的。然而，人们对它们在生物还原过程中的相互关系知之甚少。在这项工作中，在厌氧条件下，以乙酸钠作为唯一的外源电子供体和碳源，同时去除了 92.7±1.52%的 U(VI)和 100%的 V(V)。观察到各种条件（即增加铀、减少水力停留时间和乙酸盐）会影响去除效率。柱填充物的特性表明，U(VI)被沉淀为 U(IV)，V(V)被还原为不溶的 V(IV)。微生物群落结构发生了变化，其中 Aquabacterium 和 Hydrogenophaga 促进了 U(VI)和 V(V)的生物还原。富营养化的 Novosphingobium 和 Rhodobacter 也在还原 U(VI)和 V(V)方面发挥了重要作用。这些发现可用于研究含水层中 U(VI)和 V(V)的生物地球化学命运，并修复地下水 U(VI)和 V(V)的共污染。
