Improving surface properties of cathode and increasing abundance of autotrophic bacteria for chromium reduction with amino functionalized carbon nanotubes

Yu, Xiaodi; Guo, Tiantian; Liu, Xiaoliang; Zhou, Bin; Zhai, Xinru; Yang, Jing; Wang, Xiaohan; Hou, Yanjin; Yang, Qinzheng

doi:10.1016/j.jece.2022.108005

Cited by 11 publications

(9 citation statements)

References 33 publications

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“…15,16 In addition, researchers have utilized physical or chemical methods to modify carbon-based materials and improve their electrical conductivity, electron transfer rate and biofilm adhesiveness. 12,17 Yu et al 18 utilized polystyrene sulfonic acid and amino carbon nanotubes (NH 2 -CNT) to modify a hydrophilic carbon cloth using a layer-by-layer assembly method, serving as a biocathode electrode for sediment microbial fuel cell. The electrode promoted the biocathode adsorption of Cr(VI) and biofilm formation, and enriched a variety of Cr(VI)-reducing bacteria.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, composite metal nanoparticles with GO-based materials as carriers can be efficiently applied in the field of MFC treatment wastewater. 28 Metal nanoparticles have been frequently used to modify electrode materials due to their large specific surface area, strong adsorption capacity and high electrocatalytic activity, 18 and have thus attracted considerable attention for bioelectrochemical applications. [29][30][31] Zhao et al 32 improved the power density of the MFC by utilizing chemically synthesized GO/gold nanoparticle-modified carbon paper as an anode electrode.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic role of biogenic gold nanoparticles in improving Cr(VI) removal efficiency of biocathode microbial fuel cells

Tang,

Zhuang,

Zhao

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDBiogenic metal nanoparticle‐modified electrodes have a promising prospect for improving the efficiency of microbial fuel cells (MFCs) for hexavalent chromium (Cr(VI))‐containing wastewater treatment. In this study, a graphene (GO) electrode was modified with chemical gold nanoparticles (ChemAu) and biogenic gold nanoparticles (BioAu), respectively, and the two modified electrodes were then used as MFC biocathode electrodes to treat Cr(VI)‐containing wastewater.RESULTSThe results demonstrated that the BioAu/GO biocathode‐based MFC obtained the highest power density (95.78 ± 1.11 mW m−2) and Cr(VI) removal rate (2.17 ± 0.51 mg L−1 h), which were 13.19 and 1.03 times higher than those of the graphite paper biocathode‐based MFC, respectively. The Cr(VI) removal efficiency of the BioAu/GO biocathode‐based MFC under close‐circuit condition reached 87.61 ± 0.19%, which was 3.74 times higher than that recorded under open‐circuit conditions, indicating the critical role of the bioelectrochemical reduction reaction mediated by the BioAu/GO biocathode on Cr(VI) removal.CONCLUSIONThe BioAu/GO electrode first confirmed its superior performance to the ChemAu/GO electrode in Cr(VI)‐reducing MFCs due to its excellent material properties. This study provides a technical reference for the exploration of efficient bioelectrode materials based on biogenic metal nanoparticles for MFCs to treat recalcitrant pollutant‐containing wastewater. © 2024 Society of Chemical Industry (SCI).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic role of biogenic gold nanoparticles in improving Cr(VI) removal efficiency of biocathode microbial fuel cells

Tang,

Zhuang,

Zhao

et al. 2024

J of Chemical Tech & Biotech

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“…9 Various means for improving Cr( vi ) removal efficiency by biocathode MFCs have been reported. Yu et al 10 used polystyrene sulfonic acid and amino carbon nanotubes (NH 2 -CNT) to modify carbon cloth cathode in sediment microbial fuel cells (SMFCs) using layer-by-layer self-assembly, enhancing the Cr( vi ) adsorption and bacterial attachment of the cathode; a variety of Cr( vi )-reducing bacteria were also selectively enriched, leading to a high (2.06 times higher than the control) Cr( vi ) reduction rate. Zhao et al 11 used screened Corynebacterium vitaeruminis LZU47-1 to construct the biocathode, which yielded 53.4% and 52.32% higher power output and Cr( vi ) removal efficiency, respectively, over a chemical cathode control.…”

Section: Introductionmentioning

confidence: 99%

Improved performance of Cr(vi)-reducing microbial fuel cells by nano-FeS hybridized biocathodes

et al. 2023

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“…Yu et al . improved the surface properties of the cathode and increased the abundance of autotrophic bacteria by using amino‐functionalized carbon nanotubes as a cathode 15 . Qiao et al .…”

Section: Introductionmentioning

confidence: 99%

“…14 Yu et al improved the surface properties of the cathode and increased the abundance of autotrophic bacteria by using amino-functionalized carbon nanotubes as a cathode. 15 Qiao et al synthesized a nanostructured polyaniline/titanium dioxide as an Escherichia MFC anode, and the composite anode delivered an elevated power density of 1495 mW m −2 . 16 Wang et al used Cr 6+ as electron acceptors in cathodes while achieving simultaneous stable electricity production and efficient Cr(VI) reduction.…”

Section: Introductionmentioning

confidence: 99%

Biocathode electrochemical activity and reduction characteristics of Cr(VI) system in microbial fuel cells

Zhang

Zhao

Wang

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND The biocathode of microbial fuel cells (MFCs) offers a simple method for the reductive treatment of Cr(VI), and Cr(VI) is an electron acceptor in cathodes in MFCs. In this study, MFCs with different Cr(VI) contents (7.07–35.35 mg L−1) were considered to evaluate the overall performance of MFCs. RESULTS The results of electrochemical analysis confirmed that the MFC‐2 biocathode exhibited a higher effective reaction surface, stronger conductivity, and smaller charge transfer resistance (53.63 Ω) than the others. In addition, Cr(VI) had a power output of 75.6 mW m−2 in MFC‐2 and a Cr(VI) cathodic coulombic efficiency of 103.8%. With 14.14 mg L−1 Cr(VI) content, the cathode microbe had the best activity. Cr(VI) reduction followed a pseudo‐first‐order kinetic model, with the rate constant being 0.0139 h−1. Meanwhile, this study analyzed the Cr(VI) reduction in MFCs and the release and acceptance of electrons and protons. Electrically active bacteria such as Proteobacteria were highly enriched on the anode and cathode biofilm, while the Cr(VI)‐reducing bacteria Gammaproteobacteria increased in the biofilm of the cathode. CONCLUSION This study helps in the selection of Cr(VI) concentration for the cathode, guaranteeing microbial activity and power generation performance. Microbes have the best electrochemical activity in MFC‐2 (14.14 mg L−1). Meanwhile, the change in anode microbial activity was affected by cathode performance. The microbial community was significantly influenced by Cr(VI). © 2023 Society of Chemical Industry (SCI).

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Improving surface properties of cathode and increasing abundance of autotrophic bacteria for chromium reduction with amino functionalized carbon nanotubes

Cited by 11 publications

References 33 publications

Catalytic role of biogenic gold nanoparticles in improving Cr(VI) removal efficiency of biocathode microbial fuel cells

Catalytic role of biogenic gold nanoparticles in improving Cr(VI) removal efficiency of biocathode microbial fuel cells

Improved performance of Cr(vi)-reducing microbial fuel cells by nano-FeS hybridized biocathodes

Biocathode electrochemical activity and reduction characteristics of Cr(VI) system in microbial fuel cells

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