摘要
      需要有效的水净化技术来去除新出现的污染物并防止其在农村地区广泛发生。在这项工作中，将重力驱动膜（GDM）过滤与生物污垢层中的生物锰氧化物（BioMnOx）耦合用于处理含有SMX的水。BioMnOx-GDM（含BioMnOx）和对照GDM（不含BioMnOx）的比较表明，BioMnOx-GDM具有较强的氧化能力和较高的生物活性，可显著促进DOC、NH4+-N和荧光污染物的去除。BioMnOx的形成增加了SMX降解菌的丰度，丰富了SMX的代谢途径和矿化率，并有效地促进了对SMX的去除。更重要的是，BioMnOx促进了GDM中抗生素抗性基因（ARGs）的去除，因为它增加了微生物之间的联系，降低了SMX的浓度，从而降低了ARGs的表达。LB-EPS在膜污染中起着重要作用。与对照GDM相比，BioMnOx GDM中LB-EPS的浓度降低，有利于缓解膜污染。尽管在BioMnOx GDM中形成了较厚的生物污垢层（1774.88μm对775.54μm），但孔隙率较高的生物膜（64.93%对41.24%）对通量有更积极的影响。总的来说，BioMnOx可以提高GDM系统的污染物去除和稳定通量水平。BioMnOx GDM有效地避免了EC带来的风险，并确保了农村地区的水安全。
Abstract
Effective water purification technologies are required to remove emerging contaminants (ECs) and prevent their extensive occurrence in rural areas. In this work, coupling gravity-driven membrane (GDM) filtration with biogenic manganese oxides (BioMnOx) in the biofouling layer was utilized for treating water containing SMX. Comparisons between BioMnOx-GDM (with BioMnOx) and Control-GDM (without BioMnOx) indicated that BioMnOx could significantly promote the removal of DOC, NH4+-N, and fluorescent pollutants due to its strong oxidating capacity and high biological activity. The formation of BioMnOx increased the abundance of SMX-degrading bacteria, enriched the metabolic pathway and mineralization rate of SMX, and effectively promoted the remove of SMX. More importantly, BioMnOx facilitated the removal of antibiotic resistance genes (ARGs) in the GDM, because it increased the link between microorganisms and reduced the concentration of SMX, thus reduced the expression of ARGs. LB-EPS played an important role in the membrane fouling. Compared with the Control-GDM, the concentration of LB-EPS in BioMnOx-GDM decreased, which was beneficial to alleviate membrane fouling. Although a thicker biofouling layer (1774.88 μm vs.775.54 μm) was formed in BioMnOx-GDM, the biofilm with higher porosity (64.93% vs. 41.24%) had a more positive effect on the flux. Overall, BioMnOx could improve the pollutant removal and stable flux level of the GDM system. BioMnOx-GDM effectively avoided the risks brought by ECs and ensured water safety in rural areas.

https://www.sciencedirect.com/science/article/abs/pii/S0043135422010570