Microbial fuel cell driving electrokinetic remediation of toxic metal contaminated soils

Habibul, Nuzahat; Hu, Yi; Sheng, Guo‐Ping

doi:10.1016/j.jhazmat.2016.06.041

Cited by 140 publications

(64 citation statements)

References 49 publications

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“…Interestingly, samples from C 2 (PAHs suspension + bacteria) showed a stimulation affect vs. P.subcapitata, enhancing cell growth (Figure 9). A similar eutrophic effect, but vs. Lepidium sativum, was operated by the same microbial consortium in a bioremediation experiment carried out in a soil microcosm under continuous oxygenation [5][6][7][8][9][10][11][12][13][14][15][16][17]22]. Further studies are still needed to explain this result.…”

Section: Ecotoxicological Essaymentioning

confidence: 99%

“…Nevertheless, PAHs degradation process remains extremely long, requiring from many days to over a month [5]. In recent years, microbial fuel cells (MFCs) technology is increasingly considered for the remediation of sediments and soils contaminated with heavy metals and hydrocarbons, with significant results even in sight of an in-field application [10][11][12][13][14][15][16][17][18][19][20][21]. A MFC is a mimic of a biological system in which bacteria do not transfer directly electrons produced by their metabolism to chemical electron acceptors but to an electrode, allowing the conversion of chemical energy into electricity [22].…”

Section: Introductionmentioning

confidence: 99%

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Polycyclic Aromatic Hydrocarbons (PAHs) Degradation and Detoxification of Water Environment in Single‐chamber Air‐cathode Microbial Fuel Cells (MFCs)

et al. 2017

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The influence of microelectrogenesis on PAHs degradation and detoxification operated by Pseudomonadaceae, Bacillaceae, Staphylococcaceae and Enterobacteriaceae was investigated in water environment. Single chamber, air‐cathode MFCs and bioreactors were filled with the microbial pool (107–108 CFU mL−1) inoculated in a 400 mL Winogradsky saline solution containing no other carbon and energy source than naphthalene (80 ppm), phenanthrene (40 ppm), pyrene (40 ppm), benzo(a)pyrene (20 ppm). MFCs and bioreactors operated at 25 °C for thirteen weeks. Power Density (PD) and Current Density (CD) outputs as well as PAHs degradation rate were measured. The toxic effect of PAHs suspension vs. Raphidocelis subcapitata was quantified by EC1, EC20, EC50, LOEC and NOEC calculations. The results showed a significant variability in PD and CD outputs, with highest PD of 300 mW m−3 and 25 mA m−3. After 5 weeks, the overall PAHs concentration in MFCs decreased of a 90%. COD and TOC removal respectively of 62% and 73% after 11 weeks was achieved in MFC inoculated with bacteria (MFC2). Ecotoxicological tests showed for MFCs a lower toxic effect vs. P. subcapitata when bacteria are present. Microelectrogenesis just sped up microbial metabolism rather than take advantage from the interaction of PAHs with graphite electrodes.

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Section: Ecotoxicological Essaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons (PAHs) Degradation and Detoxification of Water Environment in Single‐chamber Air‐cathode Microbial Fuel Cells (MFCs)

et al. 2017

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“…Moreover, soil MFCs generate an electric field that might enhance the transport and removal of heavy metals; the electrical properties were greatly affected by soil and water depths and temperature, and the weak electricity generated powered electrokinetic remediation effectively. Combining electrokinetics with solar energy in the remediation of metal contaminated soil was feasible …”

Section: Introductionmentioning

confidence: 99%

“…Combining electrokinetics with solar energy in the remediation of metal contaminated soil was feasible. [23][24][25] Studies of bio-electrochemical soil remediation require a long time, in a conditioned conductive environment. Few researchers have studied photocatalytic electrodes in BES.…”

Section: Introductionmentioning

confidence: 99%

Environmental decontamination using photocatalytic fuel cells and photoelectrocatalysis‐microbial fuel cells

Liu

Shi

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND To decontaminate sites of pollutants, fuel cell and bio‐electrochemical fuel cell reactors can degrade pollutants and generate electricity simultaneously, potentially decrease cost, energy consumptions and treatment cycle. In this study, a photocatalytic fuel cell (PFC) and PEC‐MFC (integrated photo‐electro‐catalysis with microbial fuel cell) were investigated to decontaminate sand/water polluted by RhB, antibiotics and heavy metal ions. RESULTS In the PFC, paired electrodes with ZnIn2S4‐AgAgCl/GO or ZnIn2S4‐RGO/MnO2, effectively removed pollutants in sand/water. The removal of RhB was 95.6% in 100 min with an external resistance of 1 Ω under aeration. Adding cyclo‐dextrin increased pollutant removals, realized 66% removal of RhB in overlying water, and significant removal in sand after 5 h, and 70% removal of tetracycline in overlying water, but only 60% without cyclodextrin after 4 h. Adding KMnO4 and NaHSO3 promoted decontamination of tetracycline from sand/water, tetracycline in water was almost completely degraded in 3.5 h with the addition, but only about 65% without any addition. In the PEC‐MFC, integrating photo‐electro‐catalytic electrode with bio‐anode, Cr(VI) in the cathode chamber was reduced rapidly and the concentration of RhB in sand decreased quickly, nearly complete in 2 h. The Cr(VI) in sand was reduced in several hours, so that, compared with previous reports, the treatment time is significantly shortened. CONCLUSION The PFC and PEC‐MFC systems are successful in decontaminating sand/water in polluted sites and are cost‐effective and sustainable methods. By building an on‐site or off‐site system with washing and cycling of the liquid stream, it could be a convenient remediation method for polluted sites. © 2018 Society of Chemical Industry

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“…Carbon-based materials, including granular graphite [17], carbon paper, carbon cloth [18], and carbon brushes [19,20], are usually chosen for their low cost, electro-conductivity, and biocompatibility. Macroporous graphitic carbon foam and carbon felt have also been used as an anode basic material in high-performance MFCs [21,22]. Among these simple anode materials, excellent performance was obtained using carbon brush anodes, as they had high surface areas and a porous structure [23].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Anodes of Microbial Fuel Cells When Carbon Brushes Are Preheated at Different Temperatures

et al. 2017

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Abstract:The anode electrode is one of the most important components in all microbial electrochemical technologies (METs). Anode materials pretreatment and modification have been shown to be an effective method of improving anode performance. According to mass loss analysis during carbon fiber heating, five temperatures (300, 450, 500, 600, and 750 • C) were selected as the pre-heating temperatures of carbon fiber brush anodes. Microbial fuel cell (MFC) reactors built up with these pre-heated carbon brush anodes performed with different power densities and Coulombic efficiencies (CEs). Two kinds of measuring methods for power density were applied, and the numerical values of maximum power densities diverged greatly. Reactors with 450 • C anodes, using both methods, had the highest power densities, and the highest CEs were found using 500 • C anode reactors. The surface elements of heat-treated carbon fibers were analyzed using X-ray photoelectron spectra (XPS), and C, O, and N were the main constituents of the carbon fiber. There were four forms of N1s at the surface of the polyacrylonitrile (PAN)-based carbon fiber, and their concentrations were different at different temperature samples. The microbial community of the anode surface was analyzed, and microbial species on anodes from every sample were similar. The differences in anode performance may be caused by mass loss and by the surface elements. For carbon brush anodes used in MFCs or other BESs, 450-500 • C preheating was the most suitable temperature range in terms of the power densities and CEs.

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Microbial fuel cell driving electrokinetic remediation of toxic metal contaminated soils

Cited by 140 publications

References 49 publications

Polycyclic Aromatic Hydrocarbons (PAHs) Degradation and Detoxification of Water Environment in Single‐chamber Air‐cathode Microbial Fuel Cells (MFCs)

Polycyclic Aromatic Hydrocarbons (PAHs) Degradation and Detoxification of Water Environment in Single‐chamber Air‐cathode Microbial Fuel Cells (MFCs)

Environmental decontamination using photocatalytic fuel cells and photoelectrocatalysis‐microbial fuel cells

Analysis of Anodes of Microbial Fuel Cells When Carbon Brushes Are Preheated at Different Temperatures

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