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Efficient Removal of Cr(VI) from Aqueous Solution with Fe@Fe2O3 Core−Shell Nanowires
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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Cites
The adsorption of gases on plane surfaces of glass, mica and platinum
Langmuir, I. (1918) · Journal of the American Chemical Society · doi:10.1021/ja02242a004 · Cited by 23,242
MALKOC, E., & NUHOGLU, Y. (2007) · Separation and Purification Technology · doi:10.1016/j.seppur.2006.09.017 · Cited by 318
Cited by
Heavy metal removal from wastewater using various adsorbents: a review
Renu, Agarwal, M., & Singh, K. (2017) · Journal of Water Reuse and Desalination · doi:10.2166/wrd.2016.104 · Cited by 675
Lyu, H., Tang, J., Huang, Y., Gai, L., Zeng, E. Y., Liber, K., & Gong, Y. (2017) · Chemical Engineering Journal · doi:10.1016/j.cej.2017.04.058 · Cited by 578
Guo, X., Du, B., Wei, Q., Yang, J., Hu, L., Yan, L., & Xu, W. (2014) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2014.05.075 · Cited by 555
Li, X., Gao, X., Ai, L., & Jiang, J. (2015) · Chemical Engineering Journal · doi:10.1016/j.cej.2015.03.127 · Cited by 382
Ai, Z., Gao, Z., Zhang, L., He, W., & Yin, J. J. (2013) · Environmental Science & Technology · doi:10.1021/es4005202 · Cited by 338
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Metadata
- Authors
- Ai, Z., Cheng, Y., Zhang, L., & Qiu, J.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- 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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