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γ-Fe2O3 nanoparticle-facilitated bisphenol A degradation by white rot fungus

γ-Fe2O3纳米颗粒促进白腐菌降解双酚A

  • Article
  • Chemistry
  • Published:
Science Bulletin

Abstract

The effect of γ-Fe2O3 nanoparticles on bisphenol A (BPA) biodegradation by white rot fungus (Pleurotus ostreatus) was investigated. Interestingly, the addition of γ-Fe2O3 nanoparticles enhanced BPA degradation efficiency by as much as 32 % after 3 d in the presence of an environmentally relevant concentration of H2O2. The γ-Fe2O3-induced BPA degradation enhancement was not due to a commonly assumed Fenton-like reaction catalyzed by γ-Fe2O3 or dissolved Fe3+ ions. However, γ-Fe2O3 was bioreduced to Fe3O4, which was more efficient at catalyzing the Fenton reaction, producing a highly active hydroxyl radical. The bioreduction of γ-Fe2O3 was confirmed by X-ray powder diffraction analysis. This study elucidates the potential biotransformation of nanoparticles in the environment and broadens the application of iron oxide nanoparticles for improved pollutant control.

摘要

探讨了γ-Fe2O3纳米颗粒对白腐菌(平菇)降解双酚A(BPA)的影响。有趣的是,反应3天时在有环境浓度H2O2存在情况下γ-Fe2O3纳米颗粒可增强BPA的降解率, 可高达32%。然而γ-Fe2O3 增强BPA降解的原因并不是普遍认为的γ-Fe2O3或溶解的铁离子参与的芬顿催化反应。事实上γ-Fe2O3被生物还原为Fe3O4,Fe3O4作为一种更有效的芬顿催化剂产生高活性的羟基自由基促进BPA降解。本文用X射线粉末衍射分析证实了γ-Fe2O3的生物还原。本研究表明纳米颗粒可在环境中被生物转化,拓展了氧化铁纳米颗粒在污染物控制方面的潜在应用。

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Acknowledgments

This work was supported by the National Basic Research Program of China (2014CB932001), the National Natural Science Foundation of China (21237002), and the Tianjin Municipal Science and Technology Commission (13JCZDJC35900).

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  1. Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control and College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China

    Mingzhu Li & Chengdong Zhang

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  1. Mingzhu Li
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  2. Chengdong Zhang
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Correspondence to Chengdong Zhang.

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Li, M., Zhang, C. γ-Fe2O3 nanoparticle-facilitated bisphenol A degradation by white rot fungus. Sci. Bull. 61, 468–472 (2016). https://doi.org/10.1007/s11434-016-1021-2

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  • DOI: https://doi.org/10.1007/s11434-016-1021-2

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