Resilience and limitations of MFC anodic community when exposed to antibacterial agents

Obata, Oluwatosin; Greenman, John; Kurt, Halil; Chandran, Kartik; Ieropoulos, Ioannis

doi:10.1016/j.bioelechem.2020.107500

Cited by 25 publications

(1 citation statement)

References 38 publications

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“…Previous studies demonstrated that both Proteobacteria and Firmicutes were defined as the most common EABs in MFC reactors (Logan and Regan 2006;Wang et al, 2019;Tao et al, 2020). The microorganisms of various genera in the Proteobacteria phylum play important roles in degrading substrates and generating electricity (Obata et al, 2020). Cheng et al (Cheng et al, 2021) noted that the high EAB abundances in both devices would have promoted COD removal, and the results confirmed that this did occurred.…”

Section: Analysis Of System Community Compositionmentioning

confidence: 71%

RETRACTED: Treatment mechanism of hexavalent chromium wastewater in constructed wetland-microbial fuel cell coupling system

Shi

Tang

You

et al. 2022

Front. Environ. Sci.

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Cr(VI) is toxic to the human body and environment. As a suitable wastewater treatment with low energy requirement technology, constructed wetland-microbial fuel cells (CW-MFCs) can treat Cr(VI) wastewater while generating electricity. In this study, CW-MFC and constructed wetland systems were developed to purify Cr(VI) wastewater. The removal mechanism of Cr(VI) was examined by electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy. The results demonstrated that the average pollutant removal efficiency of the CW-MFC system is 2.99–8.13% higher than that of the constructed wetland system, and the maximum power density is 505.61 mW m−2. Moreover, the XPS and EPR analyses demonstrated that Cr in substrates and Leersia hexandra Swartz primarily is in the form of Cr(III). Moreover, in plants and substrates, the Cr(III) content of the CW-MFC system was higher than that of the control, and the bioconcentration and translocation factors were 0.23 and 0.05 higher than those in the control group, respectively. Therefore, the CW-MFC system can efficiently remove Cr(VI) and promote the accumulation and transport of Cr. Microbial community diversity in the CW-MFC was significantly higher than CW. The abundance of electrogenic bacteria Geobacter and metal dissimilatory reducing bacteria Acinetobacter in CW-MFC is higher than that in CW. To summarize, the study results provide a theoretical basis for the mechanism study of Cr(VI) wastewater treatment using CW-MFC systems.

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