Issue 42, 2022

Preparation of MES@Fe3O4@SiO2-PPy magnetic microspheres for the highly efficient removal of Cr(vi)

Abstract

Amino-functionalized monodisperse polymeric microspheres have great significance in water remediation. Herein, polypyrrole (PPy)-modified silica-coated magnetic monodispersed emulsion sphere (MES) microspheres (MES@Fe3O4@SiO2-PPy, MFSP) were successfully prepared via in situ polymerization for the adsorption of hexavalent chromium in an aqueous solution. The magnetism of MFSP enabled fast separation under an applied magnetic field. The results showed that MFSP exhibited outstanding adsorption for Cr(VI) (301.2 mg g−1 at pH 2.0), which followed the pseudo-second-order kinetic and Langmuir isotherm models. Moreover, the MFSP can be reused in the adsorption–desorption cycle by simple elution, and the removal rate of Cr(VI) by MFSP remained above 91% after five consecutive cycles. Combined with XPS, EDS, and Zeta potential measurement for adsorption mechanism analysis, it was concluded that the removal of Cr(VI) could be attributed to both adsorption and reduction. The combination of good adsorption performance and magnetic separation makes MFSP a promising candidate for the removal of low-concentration metal ions.

Graphical abstract: Preparation of MES@Fe3O4@SiO2-PPy magnetic microspheres for the highly efficient removal of Cr(vi)

Supplementary files

Article information

Article type
Paper
Submitted
07 Sep 2022
Accepted
27 Sep 2022
First published
10 Oct 2022

New J. Chem., 2022,46, 20160-20171

Preparation of MES@Fe3O4@SiO2-PPy magnetic microspheres for the highly efficient removal of Cr(VI)

Z. Hu, L. Wang, M. Liu, Z. Huang, J. Yang, W. Rao, H. Wang, Y. Xie and C. Yu, New J. Chem., 2022, 46, 20160 DOI: 10.1039/D2NJ04456K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements