Issue 71, 2018

Removal of arsenic(v) from aqueous solutions using sulfur-doped Fe3O4 nanoparticles

Abstract

In this study, magnetic sulfur-doped Fe3O4 nanoparticles (Fe3O4:S NPs) were applied as adsorbents for the removal of As(V). Fe3O4:S NPs were fabricated by a two-step route, which included low-temperature mixing and high-temperature sintering. The as-prepared Fe3O4:S NPs could effectively remove As(V) under a wide pH range of 2–10 and presented a high As(V) adsorption capacity of 58.38 mg g−1, which was much better than undoped Fe3O4 nanoparticles (20.24 mg g−1). Adsorption experiments exhibited a pseudo-second-order model of adsorption kinetics and a Langmuir isotherm model of adsorption isotherms. Additionally, the coexisting ions such as NO3, SO42−, and CO32− had no significant effect on As(V) adsorption and the adsorbent worked well in actual smelting wastewater. XPS and FTIR spectra of Fe3O4:S NPs before and after As(V) adsorption showed that Fe–OH groups played a significant role in the adsorption mechanisms. Moreover, the magnetic Fe3O4:S NPs adsorbents after adsorption could be rapidly separated from wastewater with an external magnetic field. Therefore, Fe3O4:S NPs could be an ideal candidate for the removal of As(V) from water.

Graphical abstract: Removal of arsenic(v) from aqueous solutions using sulfur-doped Fe3O4 nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
20 Oct 2018
Accepted
22 Nov 2018
First published
05 Dec 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 40804-40812

Removal of arsenic(V) from aqueous solutions using sulfur-doped Fe3O4 nanoparticles

J. Liu, L. Kong, X. Huang, M. Liu and L. Li, RSC Adv., 2018, 8, 40804 DOI: 10.1039/C8RA08699K

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