A study of phosphate absorption by magnesium iron hydroxycarbonate

作者：Du Yi; Rees Nicholas; O'Hare Dermot^*

来源：Dalton Transactions, 2009, (39): 8197-8202.

DOI：10.1039/b909853d

A study of the mechanism of phosphate adsorption by magnesium iron hydroxycarbonate, [Mg2.25Fe0.75(OH)(6)](CO3)(0.37)center dot 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 P-31 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.

• 出版日期2009