生物金纳米颗粒在提高生物阴极微生物燃料电池去除六价铬效率中的催化作用

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-03-25 DOI:10.1002/jctb.7635

Shien Tang, Xinglei Zhuang, Wanqi Zhao, Jinhua Liang, Yang Zeng, Fengxue Xin, Weiliang Dong, Honghua Jia, Xiayuan Wu

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引用次数: 0

摘要

背景生物金属纳米粒子修饰电极在提高微生物燃料电池（MFC）处理含六价铬（Cr(VI)）废水的效率方面具有广阔的前景。本研究分别用化学金纳米颗粒（ChemAu）和生物金纳米颗粒（BioAu）修饰了石墨烯（GO）电极，然后将这两种修饰电极用作 MFC 生物阴极电极来处理含六价铬的废水。结果表明，基于 BioAu/GO 生物阴极的 MFC 获得了最高的功率密度（95.78 ± 1.11 mW m-2）和六价铬去除率（2.17 ± 0.51 mg L-1 h），分别是基于石墨纸生物阴极的 MFC 的 13.19 倍和 1.03 倍。在闭路条件下，基于 BioAu/GO 生物阴极的 MFC 对六价铬的去除率达到了 87.61 ± 0.19%，是开路条件下的 3.74 倍，表明 BioAu/GO 生物阴极介导的生物电化学还原反应对六价铬的去除起到了关键作用。这项研究为探索基于生物金属纳米颗粒的高效生物电极材料提供了技术参考，可用于 MFCs 处理含难降解污染物的废水。© 2024 化学工业学会（SCI）。

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

BACKGROUND

Biogenic 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.

RESULTS

The 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.

CONCLUSION

The 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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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.