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Issue 1, 2017
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Iron supported on bioinspired green silica for water remediation

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Abstract

Iron has been used previously in water decontamination, either unsupported or supported on clays, polymers, carbons or ceramics such as silica. However, the reported synthesis procedures are tedious, lengthy (involving various steps), and either utilise or produce toxic chemicals. Herein, the use of a simple, rapid, bio-inspired green synthesis method is reported to prepare, for the first time, a family of iron supported on green nanosilica materials (Fe@GN) to create new technological solutions for water remediation. In particular, Fe@GN were employed for the removal of arsenate ions as a model for potentially toxic elements in aqueous solution. Several characterization techniques were used to study the physical, structural and chemical properties of the new Fe@GN. When evaluated as an adsorption platform for the removal of arsenate ions, Fe@GN exhibited high adsorption capacity (69 mg of As per g of Fe@GN) with superior kinetics (reaching ∼35 mg As per g sorbent per hr) – threefold higher than the highest removal rates reported to date. Moreover, a method was developed to regenerate the Fe@GN allowing for a full recovery and reuse of the adsorbent in subsequent extractions; strongly highlighting the potential technological benefits of these new green materials.

Graphical abstract: Iron supported on bioinspired green silica for water remediation

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Supplementary files

Article information


Submitted
04 Jul 2016
Accepted
03 Sep 2016
First published
13 Sep 2016

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2017,8, 567-576
Article type
Edge Article

Iron supported on bioinspired green silica for water remediation

K. M. Alotaibi, L. Shiels, L. Lacaze, T. A. Peshkur, P. Anderson, L. Machala, K. Critchley, S. V. Patwardhan and L. T. Gibson, Chem. Sci., 2017, 8, 567
DOI: 10.1039/C6SC02937J

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