Removal of Toxic Metal Ions from Wastewater Through Microbial Fuel Cells

Yaqoob, Asim Ali; Idris, Mustapha Omenesa; Ahmad, Akil; Daud, Najwa Najihah Mohamad; Ibrahim, Mohamad Nasir Mohamad

doi:10.1007/978-981-19-2681-5_15

Cited by 5 publications

(4 citation statements)

References 114 publications

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“…In the field of MFCs, several studies have reported that the presence of filamentous appendages or rod-shaped morphology indicates the presence of conductive pili-based species. These conductive pili-based species include Acinetobacter, Lysinibacillus, Escherichia, and Klebsiella pneumoniae species according to the literature reports [19,47]. At the end, EDX analysis was performed to investigate the biofilms.…”

Section: Biofilm Studymentioning

confidence: 99%

Degradation of Hydroquinone Coupled with Energy Generation through Microbial Fuel Cells Energized by Organic Waste

et al. 2022

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Microbial fuel cell (MFC) technology has captured the scientific community’s attention in recent years owing to its ability to directly transform organic waste into electricity through electrochemical processes. Currently, MFC systems faces a number of barriers, with one of the most significant being the lack of organic substrate to provide enough energy for bacterial growth and activity. In the current work, rotten rice was utilized as an organic substrate to boost bacterial activity to produce more energy and break down the organic pollutant hydroquinone in an effort to improve the performance of MFCs. There are only a few studies that considered the waste as an organic substrate and simultaneously degraded the organic pollutant vis-à-vis MFCs. The oxidation of glucose derived from rotten rice generated electrons that were transported to the anode surface and subsequently flowed through an external circuit to the cathode, where they were used to degrade the organic pollutant hydroquinone. The results were consistent with the MFC operation, where the 168-mV voltage was generated over the course of 29 days with a 1000 Ω external resistance. The maximum power and current densities were 1.068 mW/m2 and 123.684 mA/m2, respectively. The hydroquinone degradation was of 68%. For the degradation of organic pollutants and the production of energy, conductive pili-type bacteria such as Lacticaseibacillus, Pediococcus acidilactici and Secundilactobacillus silagincola species were identified during biological characterization. Future recommendations and concluding remarks are also included.

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Section: Biofilm Studymentioning

confidence: 99%

Degradation of Hydroquinone Coupled with Energy Generation through Microbial Fuel Cells Energized by Organic Waste

et al. 2022

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“…There are several operating issues, such as pH, temperature control, potential range, etc., but several scholars optimized it at different ranges and mostly agreed to operate the MFCs at natural conditions, such as pH 7 at room temperature. They also believed that they could minimize the internal resistance by improving the MFCs design and reducing the distance between the anode and cathode [66]. In spite of these relatively minor concerns, the most important problems involve electron transportation and generation.…”

Section: Challenges and Future Perspectivesmentioning

confidence: 99%

“…May 2023); FigureS2: MFCs Set-up for phenol degradation; FigureS3: Different mechanisms of the electron transfer from bacterial species to anode electrode in MFCs (Adapted from reference[70] with Elsevier permission). References[24,66,[70][71][72] are cited in Supplementary Materials.…”

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confidence: 99%

Bioenergy Generation and Phenol Degradation through Microbial Fuel Cells Energized by Domestic Organic Waste

et al. 2023

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Microbial fuel cells (MFCs) seem to have emerged in recent years to degrade the organic pollutants from wastewater. The current research also focused on phenol biodegradation using MFCs. According to the US Environmental Protection Agency (EPA), phenol is a priority pollutant to remediate due to its potential adverse effects on human health. At the same time, the present study focused on the weakness of MFCs, which is the low generation of electrons due to the organic substrate. The present study used rotten rice as an organic substrate to empower the MFC’s functional capacity to degrade the phenol while simultaneously generating bioenergy. In 19 days of operation, the phenol degradation efficiency was 70% at a current density of 17.10 mA/m2 and a voltage of 199 mV. The electrochemical analysis showed that the internal resistance was 312.58 Ω and the maximum specific capacitance value was 0.00020 F/g on day 30, which demonstrated mature biofilm production and its stability throughout the operation. The biofilm study and bacterial identification process revealed that the presence of conductive pili species (Bacillus genus) are the most dominant on the anode electrode. However, the present study also explained well the oxidation mechanism of rotten rice with phenol degradation. The most critical challenges for future recommendations are also enclosed in a separate section for the research community with concluding remarks.

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“…The investigation's findings on the -processes are summarized as follows (Equations ( 3)-( 5 Moving electrons from the anode electrode (where they are generated) to the cathode electrode (where they are reduced) is a key step in the oxidation process. Since there was only a single chamber in the MFC employed in this work, moving the protons from the anode to the cathode chamber was significantly easier [62,63]. The electrons are transferred via the provided outer circuit that is located outside.…”

Section: Oxidation Of Food Wastementioning

confidence: 99%

Impact of Self-Fabricated Graphene–Metal Oxide Composite Anodes on Metal Degradation and Energy Generation via a Microbial Fuel Cell

2023

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Microbial fuel cells (MFCs) are thought to be ecologically friendly, despite electron transport and generation challenges. In order to address this, the efficiency of MFCs was investigated using two different anode electrodes made from biomass: graphene oxide (GO) and graphene oxide-metal oxide (GO-MO) (GO-ZnO). After 18 days of operation, the maximum power density for GO was 0.69 mW/m2, whereas the maximum power density for GO-ZnO was 1.05 mW/m2. Furthermore, the ability of MFCs to transform the soluble metal ions (Cd2+, Cr3+, Pb2+, and Ni2+) into an insoluble state was investigated, which is a secondary use of MFCs with significant benefits. In the soluble state of metal ion transformation into an insoluble state, the rate of GO-ZnO was higher (92.71%) than that of GO (81.20%). The outcomes of material, analytical, and biological tests undertaken to validate the efficiency of anodes are presented. It has been shown that using innovative materials as electrodes in MFCs is a potential method for improving electron transport. Furthermore, as an organic substrate, food waste seems to be a viable alternative to more traditional options. In light of these discoveries, we investigate various unanswered issues and possibilities for MFCs. Organic substrate evaluation trials were also included in the present results to demonstrate that organic waste may be a reliable source of MFC performance. This article also has a thorough discussion of food waste oxidation, as well as challenges and future recommendations.

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Removal of Toxic Metal Ions from Wastewater Through Microbial Fuel Cells

Cited by 5 publications

References 114 publications

Degradation of Hydroquinone Coupled with Energy Generation through Microbial Fuel Cells Energized by Organic Waste

Degradation of Hydroquinone Coupled with Energy Generation through Microbial Fuel Cells Energized by Organic Waste

Bioenergy Generation and Phenol Degradation through Microbial Fuel Cells Energized by Domestic Organic Waste

Impact of Self-Fabricated Graphene–Metal Oxide Composite Anodes on Metal Degradation and Energy Generation via a Microbial Fuel Cell

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