Farhan Papiya, Prasanta Pattanayak, Abul Kalam Biswas et al.

Journal of environmental chemical engineering • 2021

Guangtuan Huang, Yichong Zhang, Jingwen Tang et al.

Journal of Environmental Engineering • 2020

A microbial fuel cell (MFC) was constructed to remediate cadmium (Cd) contaminated soil, and the effects of Cd concentration (0, 5, 20, and 100 mg/kg) and electrode spacing (3, 6, and 9 cm) on reactors were studied. The results showed that different Cd concentrations had no significant effect on the output voltage and internal resistance. However, the electrode spacing was inversely proportional to the MFC power generation and proportional to the charge transfer internal resistance (Rct) by the electrochemical impedance spectroscopy (EIS) test. The maximum power density was 22.93 mW/m2 (in MFC-0 mg/kg) and 22.71 mW/m2 (in MFC-3 cm), which was the best among the MFCs of different Cd concentrations and electrode spacing, respectively. After 50 days of operation, the maximum accumulation rate of Cd at the cathode was observed in MFC-5 mg/kg and MFC-3 cm, which were 130.00% and 107.70%, respectively. The kinetic analysis showed that high Cd concentrations and large electrode spacing could reduce the accumulation of Cd (ζCd) at the cathode as a result of the influence of soil respiration and cation migration, respectively. The results revealed that a MFC is a feasible option for remediating Cd contaminated soil, and the electrode spacing was the main determinant of the MFC performance and Cd accumulation rate, while the impact of the Cd concentration was minimal.

Cheng Peng, Rui Shan, Haoran Yuan et al.

Process Safety and Environmental Protection • 2020

Narendran Sekar, Changhao Wu, Michael W. W. Adams et al.

Biotechnology and Bioengineering • 2017

Hyperthermophiles are microorganisms that thrive in extremely hot environments with temperatures near and even above 100°C. They are the most deeply rooted microorganisms on phylogenetic trees suggesting they may have evolved to survive in the early hostile earth. The simple respiratory systems of some of these hyperthermophiles make them potential candidates to develop microbial fuel cells (MFC) that can generate power at temperatures approaching the boiling point. We explored extracellular electron transfer in the hyperthermophilic archaeon Pyrococcus furiosus (Pf) by studying its ability to generate electricity in a two-chamber MFC. Pf growing in defined medium functioned as an anolyte in a MFC operated at 90°C, generating a maximum current density of 2 A m -2 and a peak power density of 225 mW m -2 without the addition of any external redox mediator. Electron microscopy and electrochemical impedance spectroscopy of the anode with the attached Pf biofilm demonstrated bio-electrochemical behavior that led to electricity generation in the MFC via direct electron transfer. This proof of concept study reveals for the first time that a hyperthermophile such as Pf can generate electricity in MFC at extreme temperatures. Biotechnol. Bioeng. 2017;114: 1419-1427. © 2017 Wiley Periodicals, Inc.

Ying Cheng, Mallavarapu Megharaj, Ravi Naidu et al.

Chemosphere • 2017

László Koók, Jan Žitka, Péter Bakonyi et al.

Separation and Purification Technology • 2019

In this work, two polymeric membrane separators (a proton exchange membrane (PEM), Nafion, and an anion-exchange membrane (AEM), 1,4-diazabicyclo[2.2.2]octane (DABCO)-functionalized PSEBS) deployed in microbial fuel cells (MFCs) are comparatively assessed. The performances of MFCs according to membrane type were evaluated by biological and electrochemical techniques, employing metagenomics, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). It was found that the anodic biofilms of MFCs, irrespective of the type of membrane, were dominated by Geobacter sulfurreducens (37 and 50% for AEM-MFC and PEM-MFC, respectively), a well-known electrochemically active species. Furthermore, the AEM-MFC reflected a significantly lower internal resistance (145 Ω) compared to PEM-MFC (339 Ω) and produced higher maximal current densities and energy yields at all substrate (acetate) concentrations, as follows: 400 vs. 285 mA m−2 (5 mM acetate); 360 vs. 320 mA m−2 (10 mM acetate), 305 vs. 235 mA m−2 (15 mM acetate) and 238 vs.132 kJ m−2 gCOD (5 mM acetate), 161 vs. 128 kJ m−2 gCOD (10 mM acetate), 114 vs. 59 kJ m−2 gCOD (15 mM acetate) respectively. The CV measurements implied diffusion limitations in the MFCs, which were supported by EIS. In addition, the PEM and AEM characterizations revealed that in both cases, the ion exchange capacity, ionic conductivity and oxygen mass transport features were altered considerably over the 39 days during which the MFCs operated.

Indrajit Chakraborty, Neel Ghosh, Debanjali Ghosh et al.

International Journal of Hydrogen Energy • 2020

Sanath Kondaveeti, Sanjay K. S. Patel, Raviteja Pagolu et al.

Energy • 2019

Meriem Djellali, Mostéfa Kameche, Hakima Kebaili et al.

Environmental Technology • 2019

Following their successful utilization as novel bioanodes in Microbial Fuel Cells (MFCs), Layered Double Hydroxide (LDH) were tested in the present investigation, as promising cathodes to reduce electrons coming from oxidation of organic matter in the anode compartment, in the presence of oxygen used as successful oxidant. Therefore, the LDH samples Ni 3 Al-LDH with the ionic ratio Ni 2+ /Al 3+ equal to 3, were synthesized and added by adsorption to Carbon Felt (CF) fibres. They were then stored separately in three electrolyte solutions KCl, NiCl 2 and AlCl 3 used as catholytes in the MFCs. Effects of the active cationic sites located inside the Ni 3 Al-LDH on these electrolytes, were discussed in terms of energies produced by these MFCs. The structure and morphology of the synthesized LDH, were studied by using the analytical techniques XRD, FTIRS and SEM, while the electrode performances of the LDH-electrodes were investigated with the electrochemical methods CV and EIS. It was revealed that the CF modified with Ni 3 Al-LDH cathode and conditioned in the NiCl 2 electrolyte solution yielded the highest energy harvesting for the MFC (i.e. 3.2 µW/cm 2 ). This power density output was similar to previous clean one-compartment MFC. However, it was less expensive than an Enzymatic Fuel Cell (45 µW/cm 2 ), making in evidence the highest cost of the material. Thus, by taking into account these encouraging findings, the low cost materials used in MFCs held great promise for practical application in electrochemical power devices and therefore fruit waste treatment. Abbreviations: ACFC: Air Cathode Fuel Cell; ADEFC: Alkaline Direct Ethanol Fuel Cell; AFC: Alcaline Fuel Cell; BET: Brunauer-Emmett-Teller; BFC: Biological Fuel Cell; CF: Carbon Felt; CV: Cyclic Voltammetry; DGFC: Direct Glucose Fuel Cell; DMFC: Direct Methanol Fuel Cell; EFC: Enzymatic Fuel Cell; EIS: Electrochemical Impedance Spectroscopy; FC: Fuel Cell; FTIR: Fourier Transform Infra Red spectroscopy; LDH: Layered Double Hydroxide; MEC: Microbial Electrolysis Cell; MFC: Microbial Fuel Cell; Mg-Al- CO 3 2 -LDH: Layered Double Hydroxide Magnesium-Aluminium-Carbonate; Ni-Al-LDH: Layered Double Hydroxide Nickel-Aluminium; OCP: Open Circuit Potential; SEM: Scanning Electron Microscope; TG/DTA: ThermoGravimetric and Differential Thermal Analysis; XRD: X-Ray Diffraction.

Alok Kumar Tiwari, Jain Suransh, Alka A. Mungray et al.

Journal of environmental chemical engineering • 2019

Rana Tajdid Khajeh, Soheil Aber, Katayoon Nofouzi et al.

Environmental Science and Pollution Research • 2020

Yichong Zhang, Qiang Xu, Guangtuan Huang et al.

International Journal of Hydrogen Energy • 2020

Peng Li, Xinyi Li, Jianghua Huang et al.

Journal of Cleaner Production • 2022

Ruggero Rossi, Bruce E. Logan

Bioresource Technology • 2020

Xianbin Ying, Dongsheng Shen, Meizhen Wang et al.

Chemical Engineering Journal • 2017

Mahsa Masoudi, Mostafa Rahimnejad, Mehrdad Mashkour

Electrochimica Acta • 2020

Shanmugam Mahalingam, Sivasankaran Ayyaru, Young‐Ho Ahn

Chemosphere • 2021

Arpita Nandy, Vikash Kumar, Patit Paban Kundu

Biosensors and Bioelectronics • 2016

Ambika Arkatkar, Arvind Kumar Mungray, Preeti Sharma

Process Biochemistry • 2020

Samia Ait Ali Yahia, L. Hamadou, M.J. Salar-García et al.

Applied Surface Science • 2016

Xiang Liu, Xiaohua Zhao, Yangyang Yu et al.

Electrochimica Acta • 2017

• Facile approach for synthesis of conductive polyaniline nanoflower was developed. • Modification of carbon cloth electrode with polyaniline nanoflower was achieved. • The application of the modified electrode for microbial fuel cells was demonstrated A facile strategy for fabrication of conductive polyaniline (PANI) nanoflower modified carbon cloth electrode was developed and its application for microbial energy harvesting was also demonstrated. By simply tuning the concentration of aniline monomer, uniformly distributed PANI nanoflowers assembled from PANI nanoflakes anchored on the surface of carbon cloth electrode were fabricated with in-situ polymerization. Electrochemical and spectral analyses indicated that the synthesized PANI nanoflower was in conductive emeraldine salt form. Electrochemical impedance spectroscopy (EIS) analysis revealed PANI nanoflower modification reduced the charge transfer resistance of carbon cloth electrode, indicating the PANI nanoflower had excellent electrochemical activity. Furthermore, the PANI nanoflower modified electrode was used as the anode of microbial fuel cells (MFC), which delivered 2.6 and 6.5 times higher voltage and power output than these of pristine carbon cloth electrode, respectively. This work provided a controllable synthesis strategy for PANI nanostructure and demonstrated its promise in microbial energy harvesting.

Mehrdad Mashkour, Mostafa Rahimnejad, Mahdi Mashkour et al.

ChemElectroChem • 2017

Abstract In this study, wet bacterial cellulose (BC) with a water content of more than 98% was utilized as a novel scaffold to design bioanodes for microbial fuel cells (MFCs). At first, unmodified wet BC was used a bioanode. Then a simple in situ synthesis of polypyrrole (PPYR) at various pyrrole concentrations was subsequently performed on the BC‘s fibers to generate the novel bioanodes. Characterization of the BC‐PPYR nanobiocomposites was conducted by using ATR‐FTIR, XRD, and FESEM. The performance of the nanobiocomposites was studied in a MFC system by using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and polarization curves. A power density of 136 mW/m 2 and a current density of 662 mA/m 2 were found for BC‐PPYR, which are superior to those of graphite (1 mW/m 2 and 9 mA/m 2 , respectively). The results were attributed to a good adhesion of bacterial cells to the fibrous surface of BC, permanent capillary transfer of nutrients, the conductive content of hydrogel BC, and good conductivity and catalytic activity of PPYR in the nanocomposite.

M. Amirul Islam, Chee Wai Woon, Baranitharan Ethiraj et al.

Energy & Fuels • 2016

Anodic biofilm plays a crucial role in bioelectrochemical system to make it sustainable for long-term performance. However, the accumulation of dead cells over time within the anode biofilm can be particularly detrimental for current generation. In this study, the effect of ultrasound on anode biofilm thickness was investigated in microbial fuel cells (MFCs). Ultrasonic treatment was employed for different durations to evaluate its ability to control the thickness of the biofilm to maintain stable power generation. Cell viability count and field emission scanning electron microscopy (FESEM) analysis of the biofilms over time showed that the number of dead cells increased with the increase of biofilm thickness, and eventually exceeded the number of live cells by many-fold. Electrochemical impedance spectroscopy (EIS) analysis indicated that the high polarization resistance appeared due to the dead layer formation, and thus the catalytic efficiency was reduced in MFCs. The stable power generation was achieved by employing ultrasonic treatment for 30 min every 6 days with some initial exception. The low frequency ultrasound treatment successfully dislodged the ineffective biofilm from the surface of the anode. Moreover, the ultrasound could increase the mass transfer rate of the nutrients and cellular waste through the biofilm leading to the increase in cell growth. Therefore, ultrasonic treatment is verified as an efficient method to control the thickness of the biofilm as well as enhance the cell viability in biofilm thereby maintaining the stable power generation in the MFC.

Αsimina Tremouli, Ioannis Karydogiannis, Pavlos K. Pandis et al.

Energy Procedia • 2019

A four air-cathode single chamber membrane-less microbial fuel cell (MFC) was developed and used to produce energy when fed with fermentable household waste extract (FORBI; 0.8 g COD/L). The employment of MnO2 as the cathode catalyst at a loading of 89 mg /cm2, the use of food residue biomass (FORBI) and the single chamber design provided a maximum power output of 3.2 mW in 120 ml anolyte volume under Open Circuit Voltage (OCV) conditions in three batch operation cycles. The COD removal was over 78% for all operation cycles. The total resistance of the proposed design of the MFC was in the range of 12.21-12.78 Ω, which is significantly lower than the internal resistance of dual chamber MFCs. Electrochemical Impedance Spectroscopy verified the values of the internal resistance and gave an insight in the electrochemical processes occurring in the MFC. Gradual development and stabilization of an active biofilm is recorded with FORBI as substrate, while the electrode charge transfer reaction remained stable during the batch cycles.

Xiuqin Jia, Zaihua He, Xin Zhang et al.

Synthetic Metals • 2016

Shanshan Chen, Jiahuan Tang, Xianyue Jing et al.

Electrochimica Acta • 2016

Shuai Luo, Zhen He

Electrochimica Acta • 2016

Jili Zheng, Chuanxiao Cheng, Jun Zhang et al.

International Journal of Hydrogen Energy • 2016

A. Sumisha, K. Haribabu

International Journal of Hydrogen Energy • 2018

László Koók, Elie Desmond‐Le Quéméner, Péter Bakonyi et al.

Bioresource Technology • 2019

Xiao Li, Yaobin Lu, Haiping Luo et al.

Chemosphere • 2020

Byung Chul Kim, In Seop Chang, Richard M. Dinsdale et al.

Electrochimica Acta • 2020

Alka Pareek, J. Shanthi Sravan, S. Venkata Mohan

Carbon Resources Conversion • 2019

In the present work, we have reported the synthesis of 3D graphene structures by simple chemical reduction method for application in microbial fuel cell (MFC) as an anode. The synthesis procedure includes synthesis of graphene oxide by modified Hummers method followed by simultaneous reduction of graphene oxide and the formation of hydrogels. The 3D graphene structures are characterized using X-ray diffraction and Raman spectroscopy techniques. Electrochemical characterization is carried out to study the capacitive properties and impedance studies of electrodes in conductive electrolyte. 3D graphene electrodes show remarkably high capacitive current, charge storage and lower charge transfer resistance as estimated through cyclic voltammetry and Nyquist plots. In order to evaluate the performance of 3D graphene electrodes in MFC, power density and polarization curves are recorded in three configurations by varying terminal electron acceptors (TEA) viz., dissolved oxygen (MFC-DO), potassium ferricyanide and MFC without TEA (MFC-NDO). 3D graphene electrodes exhibits maximum power density of 0.49 mW/m2 in potassium ferricyanide followed by MFC-DO (0.36 mW/m2) and MFC-NDO (0.34 mW/m2). Present work highlights the viability of chemically synthesized 3D graphene electrodes as an efficient anode material in MFC.

M. Sindhuja, S. Harinipriya, Amarnath C. Bala et al.

Journal of Hazardous Materials • 2018

Nishat Khan, Abdul Hakeem Anwer, Anees Ahmad et al.

ACS Omega • 2019

The study presents the comparative bioelectrochemical treatment of phenol in anodic and cathodic compartments of four identical dual chambered microbial fuel cells (MFCs) with bare and multiwalled carbon nanotube/polypyrrole (MWCNT/PPy)-coated electrodes, respectively. It was observed that systems performing biocathodic treatment of phenol performed better as compared to the systems performing bioanodic treatment. The maximum power densities for bioanodic phenol treatment using bare and coated electrodes were found to be 469.038 and 560.719 mW/m 2 , while for biocathodic treatment, they were observed to be 604.804 and 650.557 mW/m 2 , respectively. The MFCs performing biocathodic treatment of phenol consistently showed higher chemical oxygen demand removal efficiency, Coulombic efficiency, and power density and indicated the better performance of the biocathodic bare (B-MFC) and coated (C-MFC) MFCs as compared to the bioanodic B-MFC and C-MFC. UV/vis spectrophotometry revealed that the MWCNT/PPy-coated carbon paper worked significantly better in the treatment of phenol with admirable treatment obtained within a week of the experiment as compared to the system with bare carbon paper. Cyclic voltammetry asserted better electrochemical activity of the MFC systems with coated electrodes in the treatment of phenol. The electrochemical impedance spectroscopy data also supported the better performance of biocathodic phenol treatment with lower internal and charge transfer resistances. The scanning electron microscopy images confirmed the active biofilm formation on the electrode surface. The study indicates MFC as a viable option for the treatment of recalcitrant chemical compounds with energy recovery.

Irene Merino-Jiménez, Fernando González-Juárez, John Greenman et al.

Journal of Power Sources • 2019

Ceramic membranes for MFCs offer a low cost alternative to the expensive ion exchange membranes, whilst promoting catholyte accumulation. However, their physicochemical properties need to be optimised, in order to increase the power output and the catholyte quality from MFCs. Two compositions of fine fire clay (FFC) cured under three firing cycles were manufactured, analysed and tested as ion-exchange and structural material for MFCs. The samples were characterised by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The power and catholyte generated from the ceramic MFCs with different FFC types was also evaluated. The results show a direct correlation between the ohmic resistance, the MFC power generation and the water absorption of the ceramics, giving a maximum power of 1 mW from the MFC with the most absorptive FFC (16.37% water absorbance). A slightly more alkaline catholyte was synthesised from the MFCs with higher water absorption FFC.

Taiebeh Ahmadpour, Soheil Aber, Mir Ghasem Hosseini

Journal of Power Sources • 2020

Alireza Valipour, Sivasankaran Ayyaru, Young‐Ho Ahn

Journal of Power Sources • 2016

Satish S. Rikame, Alka A. Mungray, Arvind Kumar Mungray et al.

Electrochimica Acta • 2018

Fatemeh Shahbazi Farahani, Barbara Mecheri, Mir Reza Majidi et al.

Journal of Power Sources • 2018