Enhancement of electrode properties using carbon dots functionalized magnetite nanoparticles for azo dye decolorization in microbial fuel cell

Surti, Parini; Kailasa, Suresh Kumar; Mungray, Arvind Kumar

doi:10.1016/j.chemosphere.2022.137601

Cited by 11 publications

(4 citation statements)

References 62 publications

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“…Functionalized carbon nanoparticles are currently employed as effective adsorbents for removing hazardous metals from wastewater due to their distinctive chemical and physical characteristics, showing significant potential for application in water purification initiatives (Surti et al, 2023). These materials have gained considerable attention across scientific and technical disciplines for their exceptional thermal, mechanical, optical, chemical, and physical properties.…”

Section: Functionalized Carbon (C) Nanomaterials For Removing Toxic M...mentioning

confidence: 99%

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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Engineered nanomaterials have emerged as a promising technology for water treatment, particularly for removing heavy metals. Their unique physicochemical properties enable them to adsorb large quantities of metals even at low concentrations. This review explores the efficacy of various nanomaterials, including zeolites, polymers, chitosan, metal oxides, and metals, in removing heavy metals from water under different conditions. Functionalization of nanomaterials is a strategy to enhance their separation, stability, and adsorption capacity. Experimental parameters such as pH, adsorbent dosage, temperature, contact time, and ionic strength significantly influence the adsorption process. In comparison, engineered nanomaterials show promise for heavy metal remediation, but several challenges exist, including aggregation, stability, mechanical strength, long-term performance, and scalability. Furthermore, the potential environmental and health impacts of nanomaterials require careful consideration. Future research should focus on addressing these challenges and developing sustainable nanomaterial-based remediation strategies. This will involve interdisciplinary collaboration, adherence to green chemistry principles, and comprehensive risk assessments to ensure the safe and effective deployment of nanomaterials in heavy metal remediation at both lab and large-scale levels.

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Section: Functionalized Carbon (C) Nanomaterials For Removing Toxic M...mentioning

confidence: 99%

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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“…This technology not only achieves efficient wastewater degradation but also generates renewable electrical energy [13]. When applied to wastewater containing azo dyes, microbial fuel cells can efficiently degrade these organic dyes while simultaneously generating electricity [14][15][16]. Mousavian et al constructed a dual-chamber microbial fuel cell with a graphite electrode modified by carbon nanotubes as the cathode.…”

Section: Introductionmentioning

confidence: 99%

In Situ Utilization of Electron-Enhanced Degradation of Azo Dyes in a Constructed Wetland–Microbial Fuel Cell Coupling System

Xie,

Hu,

Cao

et al. 2024

Sustainability

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In this study, a constructed wetland was coupled with a microbial fuel cell to establish a coupled system known as the constructed wetland–microbial fuel cell (CW–MFC), utilized for the treatment of X-3B azo dye wastewater at varying concentrations. Experimental results indicated that the anodic region made the primary contributions to the discoloration of azo dyes and COD removal, with a contribution rate of 60.9–75.8% for COD removal and 57.8–83.0% for the effectiveness of discoloration. Additionally, the role of plants in the constructed wetland area could achieve the removal of small molecular substances and further discoloration. In comparison to open-circuit conditions, under closed-circuit conditions the CW–MFC effectively degraded X-3B azo dye wastewater. Under an external resistance of 2000 Ω, a maximum COD removal rate of 60.0% and a maximum discoloration rate of 85.8% were achieved for X-3B azo dye at a concentration of 100 mg/L. Improvements in the treatment efficiency of X-3B dye wastewater were achieved by altering the external resistance. Under an external resistance of 100 Ω and an influent concentration of X-3B of 800 mg/L, the COD removal rate reached 78.6%, and the decolorization rate reached 85.2%. At this point, the CW–MFC exhibited a maximum power density of 0.024 W/m3 and an internal resistance of 99.5 Ω. Spectral analysis and GC–MS results demonstrated the effective degradation of azo dyes within the system, indicating azo bond cleavage and the generation of numerous small molecular substances. Microbial analysis revealed the enrichment of electrogenic microorganisms under low external resistance conditions, where Geobacter and Trichococcus were dominant bacterial genera under an external resistance of 100 Ω, playing crucial roles in power generation and azo dye degradation within the system.

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“…More importantly, the Fe-based compounds can release variable valence positive charge iron ions (Fe 2+ /Fe 3+ ) to attract negative microbial adhesion. 19,20 The variable valence iron ions also act as important transfer shuttles to transport electrons from the biofilm surface to the electrode. Thus, the Fe/N codoping strategy is a favorable method to modulate the surface electronic structure of a carbon-based anode for promoting the EET procedure.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, researchers reveal that Fe-based nanomaterials are the popular surface modifiers for the carbon-based anode. − Fe-based compounds have attracted tremendous interest owing to their good biocompatibility and high abundance. More importantly, the Fe-based compounds can release variable valence positive charge iron ions (Fe 2+ /Fe 3+ ) to attract negative microbial adhesion. , The variable valence iron ions also act as important transfer shuttles to transport electrons from the biofilm surface to the electrode. Thus, the Fe/N codoping strategy is a favorable method to modulate the surface electronic structure of a carbon-based anode for promoting the EET procedure.…”

Section: Introductionmentioning

confidence: 99%

Fe/N Codoped Paper Carbon Fiber Foam Promoted Extracellular Electron Transfer for a High-Performance Microbial Fuel Cell

Jiang,

Cheng,

et al. 2023

ACS Appl. Eng. Mater.

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Anodes are considered an important component of microbial fuel cells (MFCs) to recover electric energy from organic wastewater. Herein, Fe/N codoped paper carbon fiber foam was developed as an anode for MFCs to enhance electricity generation and wastewater treatment. The interconnected microporous network was beneficial for bacteria colonization and biofilm formation. The N doping enhanced the hydrophilicity to facilitate bacterial proximity. The Fe doping modulation adhered to the microorganisms due to the positive charge of iron ions. The codoped anode promoted the organic matter degradation efficiency and intrinsic electricity generation property based on the optimized thick biofilm. The high electricity output of MFCs was increased by the decreased internal resistance. The assembled MFCs possessed a short start-up time of 29.1 h, high maximum power density of 2270 ± 118 mW·m–2, desirable chemical oxygen demand removal efficiency of 71.7 ± 1.9%, and high decolorization efficiency of 90.3 ± 2.5% at 44 h. Fe/N codoped strategy is proposed to construct anodes for improving the electricity generation property and wastewater treatment efficiency of MFCs.

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Enhancement of electrode properties using carbon dots functionalized magnetite nanoparticles for azo dye decolorization in microbial fuel cell

Cited by 11 publications

References 62 publications

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

In Situ Utilization of Electron-Enhanced Degradation of Azo Dyes in a Constructed Wetland–Microbial Fuel Cell Coupling System

Fe/N Codoped Paper Carbon Fiber Foam Promoted Extracellular Electron Transfer for a High-Performance Microbial Fuel Cell

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