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Using thermally activated hydrotalcite for the uptake of phosphate from aqueous media

Frost, Ray L., Musumeci, Anthony W., Adebajo, Moses O., & Martens, Wayde N. (2007) Using thermally activated hydrotalcite for the uptake of phosphate from aqueous media. Journal of thermal Analysis and Calorimetry, 89(1), pp. 95-99.

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Abstract

Hydrotalcites of formula Mg6Al2(OH)16(PO4).4H2O formed by intercalation with the phosphate anion as a function of pH show variation in the d-spacing attributed to the size of the hydrated anion in the interlayer. The value changes from 11.91 Å for pH 9.3, to 7.88 Å at pH 12.5. No crystalline hydrotalcites with phosphate in the interlayer were formed at pH 9.3. Thermal decomposition identifies three steps namely dehydration, dehydroxylation and some loss of carbonate during the thermal treatment. The addition of a thermally activated ZnAl-HT to a phosphate solution resulted in the uptake of the phosphate and the reformation of the hydrotalcite. The technology has the potential for water purification through anion removal.

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23 citations in Scopus
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23 citations in Web of Science®

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314 since deposited on 18 Jul 2007
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ID Code: 8658
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author. Author contact details: r.frost@qut.edu.au
Keywords: nanochemistry, thermally activated hydrotalcite, phosphate removal, pyroaurite, thermal analysis
DOI: 10.1007/s10973-005-7478-x
ISSN: 1388-6150
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2007 Springer
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 18 Jul 2007
Last Modified: 29 Feb 2012 23:24

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