There is an urgent need to investigate the distinct performance and mechanism of traditional constructed wetland(CW),microbial fuel cells-constructed wetland(MFC-CW)and direct-enchanced constructed wetland(EC-CW)for a...There is an urgent need to investigate the distinct performance and mechanism of traditional constructed wetland(CW),microbial fuel cells-constructed wetland(MFC-CW)and direct-enchanced constructed wetland(EC-CW)for antibiotics removal.To address this issues,three kinds of CWs were bulit and distinct performance and mechanism for levofloxacin(LVFX)removal was expored in this study.MFC-CW,EC-CW achieved high LVFX removal efficiencies compared with traditional constructed wetland(96.0%in MFC-CW,95.0%in EC-CW and 91.2%in CW)and the biodegradation was the key contributor(90.7%-95.3%).MFC-CW is better capable to stimulate microbial activity and strengthen the removal effect of LVFX.MFC-CW performed well in reducing the effluent's ecotoxicity(dehydrogenase activity)and antibiotic resistance genes(ARGs).ARGs were mainly distributed in the anode region of MFC-CW while accumulating in the cathode region of EC-CW.Atribacteria,Chlorobi,Synergistetes and Firmicutes significicant effect on the efficiencies of TN,NH_(4)^(+),and LVFX.The core node for microbial community interaction in CW was only Pseudomonas in Proteobacteria(OTU4537).While MFC-CW included Opitutae_vadin HA64(OTU3153)in Verrucomicrobia,Desulfomicrobium(OTU3629)in Proteobacteria,and Actinobacteria Gaiellales(OTU4206),and EC-CW included Mesotoga(OTU1104)in Thermotogae,Syntrophus(OTU3207)in Proteobacteria and Emticicia(OTU3788)in Bacteroidetes.MFC-CW and EC-CW increased the abundance of critical microbial communities,and the microbial communities were more closely related.This study improved the understanding of the molecular mechanisms underlying the enhancement of CW by the two bioelectrochemical methods.展开更多
基金supported by the Regional Cooperation Program of Shanxi Province(No.202304041101039)ICC-CAS(No.SCJC-WRW-2023-18)+1 种基金the Fundamental Research Program of Shanxi Province(No.202203021222404)the Open Research Fund of State Environmental Protection Key Laboratory for Lake Pollution Control(No.2022HPYB-09)。
文摘There is an urgent need to investigate the distinct performance and mechanism of traditional constructed wetland(CW),microbial fuel cells-constructed wetland(MFC-CW)and direct-enchanced constructed wetland(EC-CW)for antibiotics removal.To address this issues,three kinds of CWs were bulit and distinct performance and mechanism for levofloxacin(LVFX)removal was expored in this study.MFC-CW,EC-CW achieved high LVFX removal efficiencies compared with traditional constructed wetland(96.0%in MFC-CW,95.0%in EC-CW and 91.2%in CW)and the biodegradation was the key contributor(90.7%-95.3%).MFC-CW is better capable to stimulate microbial activity and strengthen the removal effect of LVFX.MFC-CW performed well in reducing the effluent's ecotoxicity(dehydrogenase activity)and antibiotic resistance genes(ARGs).ARGs were mainly distributed in the anode region of MFC-CW while accumulating in the cathode region of EC-CW.Atribacteria,Chlorobi,Synergistetes and Firmicutes significicant effect on the efficiencies of TN,NH_(4)^(+),and LVFX.The core node for microbial community interaction in CW was only Pseudomonas in Proteobacteria(OTU4537).While MFC-CW included Opitutae_vadin HA64(OTU3153)in Verrucomicrobia,Desulfomicrobium(OTU3629)in Proteobacteria,and Actinobacteria Gaiellales(OTU4206),and EC-CW included Mesotoga(OTU1104)in Thermotogae,Syntrophus(OTU3207)in Proteobacteria and Emticicia(OTU3788)in Bacteroidetes.MFC-CW and EC-CW increased the abundance of critical microbial communities,and the microbial communities were more closely related.This study improved the understanding of the molecular mechanisms underlying the enhancement of CW by the two bioelectrochemical methods.
