Removal of boron species by layered double hydroxides : a review

Theiss, Frederick L., Ayoko, Godwin A., & Frost, Ray L. (2013) Removal of boron species by layered double hydroxides : a review. Journal of Colloid and Interface Science, 402, pp. 114-121.

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Abstract

Boron, which is an essential element for plants, is toxic to humans and animals at high concentrations. Layered double hydroxides (LDHs) and thermally activated LDHs have shown good uptake of a range of boron species in laboratory scale experiments when compared to current available methods, which are for the most part ineffective or prohibitively expensive. LDHs were able to remove anions from water by anion exchange, the reformation (or memory) effect and direct precipitation. The main mechanism of boron uptake appeared to be anion exchange, which was confirmed by powder X-ray diffraction (XRD) measurements. Solution pH appeared to have little effect on boron sorption while thermal activation did not always significantly improve boron uptake. In addition, perpetration of numerous LDHs with varying boron anions in the interlayer region by direct co-precipitation and anion exchange have been reported by a number of groups. The composition and orientation of the interlayer boron ions could be identified with reasonable certainty by applying a number of characterisation techniques including: powder XRD, nuclear magnetic resonance spectroscopy (NMR), X-ray photoelectron spectroscopy (XPS) and infrared (IR) spectroscopy. There is still considerable scope for future research on the application of LDHs for the removal of boron contaminants.

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35 citations in Scopus
29 citations in Web of Science®
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ID Code: 59715
Item Type: Journal Article
Refereed: Yes
Keywords: Layered double hydroxide, Hydrotalcite, Boron, Boric acid, Borate, Water purification
DOI: 10.1016/j.jcis.2013.03.051
ISSN: 0021-9797
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier Inc.
Deposited On: 08 May 2013 01:27
Last Modified: 28 Sep 2015 06:52

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