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Issue 39, 2009
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A study of phosphate absorption by magnesium iron hydroxycarbonate

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Abstract

A study of the mechanism of phosphate adsorption by magnesium iron hydroxycarbonate, [Mg2.25Fe0.75(OH)6](CO3)0.37·0.65H2O over a range of pH has been carried out. The efficiency of the phosphate removal from aqueous solution has been investigated between pH 3–9 and the resulting solid phases have been studied by elemental analysis, XRD, FT-IR, Raman, HRTEM, EDX and solid-state MAS 31P NMR. The analytical and spectroscopic data suggest that phosphate removal from solution occurs not by anion intercalation of the relevant phosphorous oxyanion (H2PO4 or HPO42−) into the LDH but by the precipitation of either an insoluble iron hydrogen phosphate hydrate and/or a magnesium phosphate hydrate.

Graphical abstract: A study of phosphate absorption by magnesium iron hydroxycarbonate

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Publication details

The article was received on 19 May 2009, accepted on 29 Jul 2009 and first published on 19 Aug 2009


Article type: Paper
DOI: 10.1039/B909853D
Citation: Dalton Trans., 2009,0, 8197-8202
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    A study of phosphate absorption by magnesium iron hydroxycarbonate

    Y. Du, N. Rees and D. O'Hare, Dalton Trans., 2009, 0, 8197
    DOI: 10.1039/B909853D

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