Qingfu Wang, Mingxing Zhang, Chuntian Yang et al.

Journal of Material Science and Technology • 2022

Tao Wang, Ziyang Lin, Bin Kuang et al.

Biochemical Engineering Journal • 2022

Shraddha Chauhan, Vikas Sharma, Sunita Varjani et al.

Bioresource Technology • 2022

Gian Luigi Garbini, Anna Barra Caracciolo, Ludovica Rolando et al.

New Biotechnology • 2023

Microbial Fuel Cells (MFCs) transform organic matter into electricity through microbial electrochemical reactions catalysed on anodic and cathodic half-cells. Terrestrial MFCs (TMFCs) are a bioelectrochemical system for bioelectricity production as well as soil remediation. In TMFCs, the soil is the ion-exchange electrolyte, whereas a biofilm on the anode oxidises organic matter through electroactive bacteria. Little is known of the overall microbial community composition in a TMFC, which impedes complete exploitation of the potential to generate energy in different soil types. In this context, an experiment was performed to reveal the prokaryotic community structure in single chamber TMFCs with soil in the presence and absence of a municipal waste compost (3% w/v). The microbial community was assessed on the anode and cathode and in bulk soil at the end of the experiment (54 days). Moreover, TMFC electrical performance (voltage and power) was also evaluated over the experimental period, varying the external resistance to improve performance. Compost stimulated soil microbial activity, in line with a general increase in voltage and power. Significant differences were observed in the microbial communities between initial soil conditions and TMFCs, and between the anode, cathode and bulk soil in the presence of the compost. Several electroactive genera (Bacillus, Fulvivirga, Burkholdeira and Geobacter) were found at the anode in the presence of compost. Overall, the use of municipal waste compost significantly increased the performance of the MFCs in terms of electrical power and voltage generated, not least thanks to the selective pressure towards electroactive bacteria on the anode.

Zechong Guo, Lei Gao, Ling Wang et al.

Frontiers of Environmental Science & Engineering • 2018

Lulu Zhang, Lili Ding, Xuemeng He et al.

Scientific Reports • 2019

In this study, complex structured soluble lignin wastewater was treated by electro-microbial system (EMS) using different direct current (DC) application modes (CR (continuous ON), IR 12h (12 h-ON/12 h-OFF) and IR 2h (2 h-ON/2 h-OFF)), and physiological characteristics and microbial communities were investigated. Results showed that CR, IR 12h and IR 2h had higher lignin removals, which were almost two times that of the control reactor (R 0 ', no current), and IR 2h performed best and stably. Furthermore, IR 2h exhibited the lowest ohmic resistance (Rs) of electrode biofilms, which could be explained by its higher abundance of electroactive bacteria. In the activated sludge of EMS, the concentration of dehydrogenase activity (DHA) and electronic transport system (ETS) in IR 2h were the highest (1.48 and 1.28 times of R 0 '), which contributed to its high content of adenosine triphosphate (ATP). The viability of activated sludge was not affected by different DC application modes. Phospholipid fatty acids (PLFA) analysis indicated that IR 2h had the maximum content of C15:1 anteiso A, C16:0 and C18:0; CR increased the content of C15:0 anteiso and decreased the content of saturated fatty acids. Genus-level results revealed that lignin-degrading bacteria, Pseudoxanthomonas and Mycobacterium, could be enriched in IR 2h and CR, respectively.

Yanan Hou, Huan Liu, Jinglong Han et al.

ACS Sustainable Chemistry & Engineering • 2016

Biogenetic nanopalladium (bio-Pd) has attracted increasing attention recently due to its economical and environmental friendly synthesis route. However, traditional bacteria suspensions formed palladium (Sus-Pd) is limited to be the electrochemical catalyst owing to the poor conductivity of bacterial cells. Herein, we demonstrated Pd nanoparticles, synthesized by electroactive Geobacter biofilm, can form a three-dimensional conductive network (EAB-Pd) that is beneficial to the electrons transfer. As a result, the EAB-Pd delivered an over 5-fold increase of current compared to the Sus-Pd in hydrogen evolution and the reductive degradation of nitro-, azo- and chloroaromatics. Superior performance of EAB-Pd was also observed in comparison with the commercial Pd catalyst. A good stability of EAB-Pd has been further confirmed under electrochemical and mechanical stresses as well as through the reuse after over 3 months of storage. This novel proposed method enables the direct electrochemical application of bio-Pd without the previous required cell carbonization and chemical binders.

Basem S. Zakaria, Seyed Mohammad Mirsoleimani Azizi, Biplob Kumar Pramanik et al.

The Science of The Total Environment • 2023

Gaojun Wang, Yao Xing, Guohao Liu et al.

The Science of The Total Environment • 2021

Ke Shi, Hao-Yi Cheng, Carolyn R. Cornell et al.

Journal of Hazardous Materials • 2023

Improvement of refractory nitrogen-containing organics biodegradation is crucial to meet discharged nitrogen standards and guarantee aquatic ecology safety. Although electrostimulation accelerates organic nitrogen pollutants amination, it remains uncertain how to strengthen ammonification of the amination products. This study demonstrated that ammonification was remarkably facilitated under micro-aerobic conditions through the degradation of aniline, an amination product of nitrobenzene, using an electrogenic respiration system. The microbial catabolism and ammonification were significantly enhanced by exposing the bioanode to air. Based on 16S rRNA gene sequencing and GeoChip analysis, our results indicated that aerobic aniline degraders and electroactive bacteria were enriched in suspension and inner electrode biofilm, respectively. The suspension community had a significantly higher relative abundance of catechol dioxygenase genes contributing to aerobic aniline biodegradation and reactive oxygen species (ROS) scavenger genes to protect from oxygen toxicity. The inner biofilm community contained obviously higher cytochrome c genes responsible for extracellular electron transfer. Additionally, network analysis indicated the aniline degraders were positively associated with electroactive bacteria and could be the potential hosts for genes encoding for dioxygenase and cytochrome, respectively. This study provides a feasible strategy to enhance nitrogen-containing organics ammonification and offers new insights into the microbial interaction mechanisms of micro-aeration assisted with electrogenic respiration.

Nan Lü, Lu Li, Chengzhi Wang et al.

The Science of The Total Environment • 2021

Yule Han, Wanjiang Li, Yijing Gao et al.

Water Research • 2024

Lean Zhou, Jiang Qian, Shiquan Sun et al.

Separation and Purification Technology • 2022

Jun Cheng, Rongxin Xia, Hui Li et al.

ACS Sustainable Chemistry & Engineering • 2022

A nanomaterial–living cell biohybrid system is an efficient energy conversion method due to enhanced interactions between inorganic materials and bacteria. However, inefficient electron transfer at the interface of the biohybrid remains as a limiting factor. Herein, an inorganic–biologic hybrid was proposed by combining a typical electroactive bacterium, Geobacter sulfurreducens, and a highly conductive N-doped Fe3O4 with a carbon dot shell (Fe3O4@CD) to boost energy conversion in bioelectrochemical systems (including microbial electrolytic cells and electro-methanogenesis). One-pot-synthesized Fe3O4@CDs enhanced extracellular electron transfer in the biohybrid system by forming an interaction network with conductive proteins inside and outside G. sulfurreducens. In the microbial electrolytic cell, the maximum current of Fe3O4@CDs-fed cells was 6.37 times higher than that of the control group without nanoparticle addition. This enhanced performance was accompanied with higher bioactivity, higher cellular adhesion, and lower biofilm resistance. The G. sulfurreducens–Fe3O4@CDs biohybrids supplemented during electro-methanogenesis remained stable on anodes, which promoted microbial syntrophy. The metabolic methanogenesis pathways are strongly related to the electron transfer ability of G. sulfurreducens, which demonstrates a new strategy to promote extracellular electron transfer through the constructed biohybrid system.

Daniel A. Heredia, Sol R. Martínez, Andrés M. Durantini et al.

ACS Applied Materials & Interfaces • 2019

A novel biscarbazol triphenylamine end-capped dendrimeric zinc(II) porphyrin ( DP 5 ) was synthesized by click chemistry. This compound is a cruciform dendrimer that bears a nucleus of zinc(II) tetrapyrrolic macrocycle substituted at the meso positions by four identical substituents. These are formed by a tetrafluorophenyl group that possesses a triazole unit in the para position. This nitrogenous heterocyclic is connected to a 4,4'-di( N -carbazolyl)triphenylamine group by means of a phenylenevinylene bridge, which allows the conjugation between the nucleus and this external electropolymerizable carbazoyl group. In this structure, dendrimeric arms act as light-harvesting antennas, increasing the absorption of blue light, and as electroactive moieties. The electrochemical oxidation of the carbazole groups contained in the terminal arms of the DP 5 was used to obtain novel, stable, and reproducible fully π-conjugated photoactive polymeric films ( FDP 5 ). First, the spectroscopic characteristics and photodynamic properties of DP 5 were compared with its constitutional components derived of porphyrin P 6 and carbazole D 7 moieties in solution. The fluorescence emissions of the dendrimeric units in DP 5 were more strongly quenched by the tetrapyrrolic macrocycle, indicating photoinduced energy transfer. In addition, FDP 5 film showed the Soret and Q absorption bands and red fluorescence emission of the corresponding zinc(II) porphyrin. Also, FDP 5 film was highly stable to photobleaching, and it was able to produce singlet molecular oxygen in both N , N -dimethylformamide (DMF) and water. Therefore, the porphyrin units embedded in the polymeric matrix of FDP 5 film mainly retain the photochemical properties. Photodynamic inactivation mediated by FDP 5 film was investigated in Staphylococcus aureus and Escherichia coli . When a cell suspension was deposited on the surface, complete eradication of S. aureus and a 99% reduction in E. coli survival were found after 15 and 30 min of irradiation, respectively. Also, FDP 5 film was highly effective to eliminate individual bacteria attached to the surface. In addition, photodynamic inactivation (PDI) sensitized by FDP 5 film produced >99.99% bacterial killing in biofilms formed on the surface after 60 min irradiation. The results indicate that FDP 5 film represents an interesting and versatile photodynamic active material to eradicate bacteria as planktonic cells, individual attached microbes, or biofilms.

Fatima Radouani, Concepcion Sanchez-Cid, Adèle Silbande et al.

Bioelectrochemistry • 2023

Jie Li, Yi Li, Pengli Chen et al.

Journal of environmental chemical engineering • 2022

Zhufan Lin, Shaoan Cheng, Zhen Yu et al.

The Science of The Total Environment • 2020

Nuan Yang, Huiqin Luo, Ming Liu et al.

The Science of The Total Environment • 2022

Fang Wang, Deli Zhang, Xiuli Shen et al.

Renewable Energy • 2019

Fatma Allam, Mohamed Elnouby, Soraya A. Sabry et al.

International Journal of Hydrogen Energy • 2020

Joana Moreira, Margarida M. Fernandes, Estela O. Carvalho et al.

Acta Biomaterialia • 2021

Xindi Jia, Xiaoliang Liu, Kaili Zhu et al.

Bioprocess and Biosystems Engineering • 2022

Liam Jones, Maria Salta, Torben Lund Skovhus et al.

npj Materials Degradation • 2024

Continual challenges due to microbial corrosion are faced by the maritime, offshore renewable and energy sectors. Understanding the biofilm and microbiologically influenced corrosion interaction is hindered by the lack of robust and reproducible physical models that reflect operating environments. A novel dual anaerobic biofilm reactor, using a complex microbial consortium sampled from marine littoral sediment, allowed the electrochemical performance of UNS G10180 carbon steel to be studied simultaneously in anaerobic abiotic and biotic artificial seawater. Critically, DNA extraction and 16S rRNA amplicon sequencing demonstrated the principal biofilm activity was due to electroactive bacteria, specifically sulfate-reducing and iron-reducing bacteria.

Guang Yang, Yudong Luo, Yanhong Bian et al.

Water Research • 2024

Gisele Giovanna Halfeld, Érica Janaína Rodrigues de Almeida, Valéria Reginatto et al.

International Journal of Hydrogen Energy • 2022

Zhou Juan, Meng Li, Wei Zhou et al.

The Science of The Total Environment • 2020

Yidan Hu, Xi Han, Liang Shi et al.

Electrochimica Acta • 2022

Basem S. Zakaria, Hui Guo, Younggy Kim et al.

Water Research • 2022

Yuting He, Jienan Yang, Qian Fu et al.

Journal of Power Sources • 2021

Fan Chen, Zhiling Li, Bin Liang et al.

Chemical Engineering Journal • 2018

Tom R. Molderez, Antonin Prévoteau, Frederik Ceyssens et al.

Biosensors and Bioelectronics • 2020

Lihua Zhou, Yi Wang, Lihua Sun et al.

Journal of Power Sources • 2018

Guiqin Yang, Xue Xia, Weijie Nie et al.

Environmental Research • 2023

Yue Sun, Annemiek ter Heijne, H.H.M. Rijnaarts et al.

Water Research • 2022

Methane emissions from the sewer system are considered to be a non-negligible source of aggravating the greenhouse effect. Meanwhile, the sewer system has long been plagued by sulfide-induced corrosion problems. This study explored the possibility of using a bioelectrochemical system to intensify the competition between electroactive bacteria, methanogens and sulfate-reducing bacteria, thereby reducing the production of methane and sulfide. Dual-chamber bioelectrochemical reactors were constructed and operated in fed-batch mode with the coexistence of Electroactive bacteria, Methanogenic archaea and Sulfate-reducing bacteria. Acetate was supplied as the sole carbon source. The results indicated that electrogenesis induced by the anode potentials of -0.42 V and -0.2 V (vs. Ag/AgCl) had advantages over methanogenesis and sulfidogenesis in consuming acetate. The stimulated electrogenesis by anode potentials resulted in a decrease in pH. Methane production was suppressed in the reactors with anode potentials of -0.42 and -0.2 V compared to open circuit controls. In contrast to methane, the capacity for sulfide production was facilitated in the reactors with the anode potentials of -0.42 V and -0.2 V compared to open circuit controls. 16s rRNA gene analysis showed that Geobacter was the most abundant genus on the anode biofilm in the anode potential-controlled reactor, while acetoclastic methanogens dominated in open circuit controls. Methanosaeta and Methanosarcina were the most abundant methanogens in open circuit controls. Collectively, our study demonstrates that the use of electrodes with anode potential control can help to control methane emissions, but could not yet prevent sulfide production, which requires further research.

Fan Chen, Zhiling Li, Jiaqi Yang et al.

Chemical Engineering Journal • 2018

Xuejiao Qi, Xuan Jia, Yong Wang et al.

Bioresource Technology • 2022

Mukadasi Abudureheman, Nuerla Ailijiang, Anwar Mamat et al.

Environmental Research • 2022

Tao Wang, Zhili Ni, Bin Kuang et al.

The Science of The Total Environment • 2022

Thaís González, M.S. Ureta-Zañartu, José F. Marco et al.

Applied Surface Science • 2018