scholarly journals Cellulose Derived Graphene/Polyaniline Nanocomposite Anode for Energy Generation and Bioremediation of Toxic Metals via Benthic Microbial Fuel Cells

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 135
Author(s):  
Asim Ali Yaqoob ◽  
Mohamad Nasir Mohamad Ibrahim ◽  
Khalid Umar ◽  
Showkat Ahmad Bhawani ◽  
Anish Khan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Current Density ◽  
Toxic Metals ◽  
Microbial Fuel Cells ◽  
Organic Substrate ◽  
Synthetic Wastewater ◽  
Multiple Parameters ◽  
Pani Composite ◽  
Industrial Level ◽  
Modified Graphene

Benthic microbial fuel cells (BMFCs) are considered to be one of the eco-friendly bioelectrochemical cell approaches nowadays. The utilization of waste materials in BMFCs is to generate energy and concurrently bioremediate the toxic metals from synthetic wastewater, which is an ideal approach. The use of novel electrode material and natural organic waste material as substrates can minimize the present challenges of the BMFCs. The present study is focused on cellulosic derived graphene-polyaniline (GO-PANI) composite anode fabrication in order to improve the electron transfer rate. Several electrochemical and physicochemical techniques are used to characterize the performance of anodes in BMFCs. The maximum current density during polarization behavior was found to be 87.71 mA/m2 in the presence of the GO-PANI anode with sweet potato as an organic substrate in BMFCs, while the GO-PANI offered 15.13 mA/m2 current density under the close circuit conditions in the presence of 1000 Ω external resistance. The modified graphene anode showed four times higher performance than the unmodified anode. Similarly, the remediation efficiency of GO-PANI was 65.51% for Cd (II) and 60.33% for Pb (II), which is also higher than the unmodified graphene anode. Furthermore, multiple parameters (pH, temperature, organic substrate) were optimized to validate the efficiency of the fabricated anode in different environmental atmospheres via BMFCs. In order to ensure the practice of BMFCs at industrial level, some present challenges and future perspectives are also considered briefly.

scholarly journals Outlook on the Role of Microbial Fuel Cells in Remediation of Environmental Pollutants with Electricity Generation

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 819 ◽  
Author(s):  
Asim Ali Yaqoob ◽  
Asma Khatoon ◽  
Siti Hamidah Mohd Setapar ◽  
Khalid Umar ◽  
Tabassum Parveen ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Toxic Metals ◽  
Microbial Fuel Cells ◽  
Industrial Development ◽  
Organic Dyes ◽  
Future Research ◽  
World Population ◽  
Human Beings ◽  
Aquatic Life ◽  
Severe Problem

A wide variety of pollutants are discharged into water bodies like lakes, rivers, canal, etc. due to the growing world population, industrial development, depletion of water resources, improper disposal of agricultural and native wastes. Water pollution is becoming a severe problem for the whole world from small villages to big cities. The toxic metals and organic dyes pollutants are considered as significant contaminants that cause severe hazards to human beings and aquatic life. The microbial fuel cell (MFC) is the most promising, eco-friendly, and emerging technique. In this technique, microorganisms play an important role in bioremediation of water pollutants simultaneously generating an electric current. In this review, a new approach based on microbial fuel cells for bioremediation of organic dyes and toxic metals has been summarized. This technique offers an alternative with great potential in the field of wastewater treatment. Finally, their applications are discussed to explore the research gaps for future research direction. From a literature survey of more than 170 recent papers, it is evident that MFCs have demonstrated outstanding removal capabilities for various pollutants.

Investigating bacterial community changes and organic substrate degradation in microbial fuel cells operating on real human urine

2017 ◽  
Vol 3 (5) ◽  
pp. 897-904 ◽  
Author(s):  
S. G. Barbosa ◽  
L. Peixoto ◽  
A. Ter Heijne ◽  
P. Kuntke ◽  
M. M. Alves ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Bacterial Community ◽  
Human Urine ◽  
Microbial Fuel Cells ◽  
Organic Substrate ◽  
Substrate Degradation ◽  
Community Changes

New insights are reported on the degradation of organics in urine, changes in the anodic bacterial community and MFC performance on urine.

scholarly journals Carbon Nanofibers Modified Graphite Felt for High Performance Anode in High Substrate Concentration Microbial Fuel Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Youliang Shen ◽  
Yan Zhou ◽  
Shuiliang Chen ◽  
Fangfang Yang ◽  
Suqi Zheng ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Carbon Nanofibers ◽  
Current Density ◽  
Microbial Fuel Cells ◽  
Substrate Concentration ◽  
High Substrate Concentration ◽  
Peak Current Density ◽  
Peak Current ◽  
Acetate Concentration ◽  
High Substrate

Carbon nanofibers modified graphite fibers (CNFs/GF) composite electrode was prepared for anode in high substrate concentration microbial fuel cells. Electrochemical tests showed that the CNFs/GF anode generated a peak current density of 2.42 mA cm−2at a low acetate concentration of 20 mM, which was 54% higher than that from bare GF. Increase of the acetate concentration to 80 mM, in which the peak current density of the CNFs/GF anode greatly increased and was up to 3.57 mA cm−2, was seven times as that of GF anode. Morphology characterization revealed that the biofilms in the CNFs/GF anode were much denser than those in the bare GF. This result revealed that the nanostructure in the anode not only enhanced current generation but also could tolerate high substrate concentration.

scholarly journals Facing Indonesia’s Future Energy with Bacterio-Algal Fuel Cells

2020 ◽  
Vol 3 (2) ◽  
pp. 68-82
Author(s):  
Intan Subadri ◽  
Adhi Satriyatama ◽  
Ignatius D. M. Budi
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cells ◽  
Alternative Energy ◽  
Municipal Wastewater ◽  
Electrode Materials ◽  
Carbon Sources ◽  
Organic Substrate ◽  
Electricity Production ◽  
Operational Parameter

The energy crisis has become a global issue that has plagued almost all parts of the world. MFCs (Microbial Fuel Cells) is an alternative technology because of its ability to convert waste into electrical energy. The bacterio-algal fuel cell (BAFCs) is kind of an effort for increasing the economic value and carbon capture capability of MFCs. In this case, algae used as a catholyte and organic substrate containing anode-reducing exoelectrogenic bacteria acted as anolyte. This research will examine the potential of algae in BAFCs as an alternative energy for Indonesia's future. By photosynthesis reaction, bacterio-algal fuel cells are operated in a self-sustaining cycle. It can be configured in single, dual chambers, and triple chambers. The performance of bacterio-algal fuel cells is strongly influenced by the bacterial and algae species in each compartment. Factors involved in bacterial-algal fuel cells are also analyzed and assessed: electrode materials, membrane, carbon sources, and algae pretreatment, including the operational parameter, such as pH and temperature. Bacterio-algal fuel cells are recommended to be used to convert algae into electricity by scaling-up and integrating the devices. Organic substrate could be obtained from municipal wastewater. Algae as by-product could be harvested and converted into certain products. Algal Fuel Cell is the solution to produce electricity and reduce CO2 pollution at the same time. Also, an algal fuel cell is potential for sustainable use in the future. By integrating the algal fuel cell in the factory that produces high-concentrated wastewater, the fuel cell can purify the wastewater so that it is safe to be drained to the environment and also can make an integrated electricity production for the whole factory. Some ways to improve the power production are proposed to improve the power generation from BAFCs since this technology offers clean, affordable, sustainable energy, and in-line with SDGs.

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