Iron-modified hydrotalcite-like materials as highly efficient phosphate sorbents

Journal of Colloid and Interface Science
Kostas S TriantafyllidisPaul P Mavros

Abstract

Highly efficient sorbents for phosphate removal from aqueous solutions based on the calcined forms of Fe(III)-substituted Layered Double Hydroxides (LDH) materials have been developed in this study. Hydrotalcite-like materials with Mg/M(3+) approximately 3 (where M=Al(3+), Fe(3+) or combined) have been synthesized following simple co-precipitation method and were subsequently calcined in air at 450 degrees C. Both as-synthesized and calcined materials were characterized by means of X-ray Diffraction (XRD), Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), elemental (C) analysis, N(2) porosimetry, Scanning Electron Microscopy (SEM). All the materials were evaluated for the sorption of phosphates by batch equilibrium sorption experiments and kinetic measurements (effect of contact time). It was shown that chlorides or nitrates, being the charge-balancing anions in the LDH structure, are more easily exchanged by phosphates compared to carbonates. In the Fe(III)-modified LDHs, an increase of the Fe loading led to the decrease of the sorption efficiency. The maximum uptake of phosphates for both the Mg-Al LDH and Mg-Fe LDH samples containing mainly carbonates as charge-balancing anions was relatively low (ca.<or= 25...Continue Reading

References

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Jun 7, 2005·Chemosphere·Odair Pastor FerreiraOswaldo Luiz Alves
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Feb 13, 2009·Journal of Colloid and Interface Science·Antonio ViolanteMassimo Pigna

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Citations

Apr 25, 2013·Journal of Hazardous Materials·Mohamed A OthmanAhmed E Abasaeed
May 3, 2013·Journal of Colloid and Interface Science·Frederick L TheissRay L Frost
Sep 4, 2012·International Journal of Molecular Sciences·Mahboobeh EiliWan Md Zin Wan Yunus
Jun 19, 2015·International Journal of Environmental Research and Public Health·Xiangling ZhangChongying Ruan
May 13, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Xiaowen TongXiaojun Niu
Mar 15, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Nacera BoudaoudAna Maria Sastre
Jan 25, 2020·Environmental Technology·Marina Avena MaiaMariliz Gutterres
May 26, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Nacera RezakNourredine Bettahar

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