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Iron nanoparticles in situ encapsulated in lignin-derived hydrochar as an effective catalyst for phenol removal

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Abstract

In this work, we have developed a low-cost and green strategy for nanoscale zero-valent iron (ZVI) in situ encapsulated in lignin-derived hydrochar (Fe@HC) by a facile one-pot synthesis route. The as-synthesized Fe@HC was characterized for physicochemical properties by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), transmission electron microscope (TEM), thermal gravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FT-IR). Further catalytic experiment revealed that phenol could be completely degraded by Fe@HC-800 within 20 min with peroxymonosulfate (PMS) at mild temperatures. Fe@HC-800 catalyst also exhibited stable performance after three runs of regeneration. The XPS and XRD results proved the key role of Fe0 in the degradation of phenol. This approach is of great potential to the development of green materials biomass-derived carbon materials for wastewater treatment applications.

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Funding

The authors gratefully acknowledge financial support from the National Key R&D Program of China (2017YFD0801504), National Natural Science Foundation of China (Nos. 41771342 and 41701350), and the Natural Science Foundation of Shandong Province, China (No. ZR2017MD002).

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Correspondence to Weijie Shi or Shiyun Ai.

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Responsible editor: Guilherme L. Dotto

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Ma, Q., Cui, L., Zhou, S. et al. Iron nanoparticles in situ encapsulated in lignin-derived hydrochar as an effective catalyst for phenol removal. Environ Sci Pollut Res 25, 20833–20840 (2018). https://doi.org/10.1007/s11356-018-2285-7

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  • DOI: https://doi.org/10.1007/s11356-018-2285-7

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