Jump to main content
Jump to site search

Issue 85, 2016, Issue in Progress
Previous Article Next Article

Cr(vi) removal by mesoporous FeOOH polymorphs: performance and mechanism

Author affiliations

Abstract

The mesoporous FeOOH polymorphs, i.e., goethite (α-FeOOH), akaganeite (β-FeOOH), lepidocrocite (γ-FeOOH), and feroxyhyte (δ-FeOOH) were synthesized and characterized before and after reaction with Cr(VI) by scanning electron microscopy (SEM), N2 adsorption–desorption isotherms, X-ray diffraction (XRD), saturation magnetization measurements, and X-ray photoelectron spectroscopy (XPS). The Cr(VI) removal efficiencies by these four FeOOH polymorphs were investigated. After reaction for 120 min, the Cr(VI) removal efficiencies by α-FeOOH, β-FeOOH, γ-FeOOH, and δ-FeOOH were 94.5%, 52.0%, 100%, and 84.6%, respectively. The Cr(VI) removal efficiencies by these four FeOOH polymorphs were influenced by their specific surface area. The XPS analysis indicated that the removal of Cr(VI) by these FeOOH polymorphs was a process of electrostatic attraction and ligand exchange. The study of this paper can reveal the reaction mechanism of FeOOH with Cr(VI) and the different behaviors of the four FeOOH polymorphs in the removal of Cr(VI).

Graphical abstract: Cr(vi) removal by mesoporous FeOOH polymorphs: performance and mechanism

Back to tab navigation

Supplementary files

Article information


Submitted
04 Jun 2016
Accepted
18 Aug 2016
First published
25 Aug 2016

RSC Adv., 2016,6, 82118-82130
Article type
Paper

Cr(VI) removal by mesoporous FeOOH polymorphs: performance and mechanism

S. Wu, J. Lu, Z. Ding, N. Li, F. Fu and B. Tang, RSC Adv., 2016, 6, 82118
DOI: 10.1039/C6RA14522A

Social activity

Search articles by author

Spotlight

Advertisements