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Efficient Removal of Cr(VI) from Aqueous Solution with Fe@Fe2O3 Core−Shell Nanowires

Ai, Zhihui, Cheng, Ying, Zhang, Lizhi, Qiu, Jianrong·2008·Environmental Science & Technology

Abstract

The batch removal of Cr(VI) from simulated wastewater with Fe@Fe2O3 core-shell nanowires (FCSNs) was investigated in this study. Itwas found that each gram of the FCSNs could remove 7.78 mg of Cr(VI) from simulated wastewater containing 8.0 mg L(-1) of Cr(VI) with an initial pH of 6.5 at room temperature. The Freundlich adsorption isotherm was applicable to describe the removal processes. Kinetics of the Cr(VI) removal was found to follow pseudo-second-order rate equation. Furthermore, the as-prepared and Cr(VI)-adsorbed FCSNs were carefully examined by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopic analysis (XPS). The characterization results suggested that the adsorbed Cr(VI) was partially reduced to Cr(lll) in Cr2O3/Cr(OH)3 on the FCSNs. The possible mechanism of removal of Cr(VI) on FCSNs was proposed, which involved the dominant Cr(VI) adsorption, followed by the partial reduction of Cr(VI) to Cr(III) (chromium(III) oxyhydroides) on the surface of FCSNs. These Fe@Fe2O3 core-shell nanowires with high specific surface area and strong magnetic property are very attractive for the removal of Cr(VI) from wastewater.

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Metadata

Authors
Ai, Z., Cheng, Y., Zhang, L., & Qiu, J.
Venue
Environmental Science & Technology
Published
2008-08-14
Volume
42
Issue
18
Pages
6955-6960
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2065913910
Cited by
299
References
2
FWCI
9.67
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Efficient Removal of Cr(VI) from Aqueous Solution with Fe@Fe2O3 Core−Shell Nanowires. https://app.cochat.ai/papers/10.1021/es800962m
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Ai, Z., Cheng, Y., Zhang, L., & Qiu, J. (2008). Efficient Removal of Cr(VI) from Aqueous Solution with Fe@Fe2O3 Core−Shell Nanowires. Environmental Science & Technology. https://doi.org/10.1021/es800962m

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