School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China; Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, 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.
Sci Total Environ. 2021 Jan 10;751:142161. doi: 10.1016/j.scitotenv.2020.142161. Epub 2020 Sep 2.
Bioremediation of vanadium (V) (V(V)) for polluted groundwater is an emerging topic globally. With this study, microbial removal of V(V) was investigated by sawdust of pine used as a sole carbon source. The removal efficiency of V(V) reached up to 90.3% with anaerobic sludge as inocula and sawdust as the carbon source in nutrient solution. Microbial removal of V(V) could be enhanced by adding medical stone and phosphate rock, from 53.2% up to 82.6% in real groundwater. Microbiological analysis revealed such microbes as Thauera accumulated, which could contribute to V(V) reduction. Such functional species as Bacteroidetes vadinHA17 norank and Anaerolineaceae norank helped degradation of sawdust. In column experiments with domesticated sludge or indigenous microbes from soils, microbial V(V) removal efficiencies (on 26 d) with sawdust were around 58.7% (BS), 54.8% (BP) and 38.4% (BU), respectively. The study can offer a potential approach to microbially removing V(V) for contaminated groundwater and even for disposal of agricultural and forestry wastes.
生物修复受污染地下水中的钒（V）（V(V)) 是一个全球性的新兴课题。本研究采用松木屑作为唯一碳源，考察了利用木屑去除 V(V)的情况。以厌氧污泥为接种物，以木屑为营养溶液中的碳源，V(V)的去除效率最高可达 90.3%。在实际地下水中添加麦饭石和磷矿，可将 V(V)的去除率从 53.2%提高到 82.6%。微生物分析表明，Thauera 等微生物积累，有助于 V(V)的还原。Bacteroidetes vadinHA17 norank 和 Anaerolineaceae norank 等功能菌有助于木屑的降解。在驯化污泥或土壤中土著微生物的柱实验中，用木屑处理 V(V)的微生物去除效率（26 天）分别约为 58.7%（BS）、54.8%（BP）和 38.4%（BU）。该研究可为受污染地下水微生物去除 V(V)甚至农业和林业废物处理提供一种潜在的方法。
