Ion exchange behavior of the NH4TiOPO4 based exchanger
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Several compounds of the general formula (NH4)(1-x)HxTiOPO4·nH 2O (x=0.45-0.75) were prepared by acid treatment of ammonium titanyl phosphate (NTP) at elevated temperature (80-90°C). The protonic phases of the NTP were characterized by elemental analysis, TGA, FT-IR, MAS 31P NMR and X-ray diffraction. Their ion exchange behavior towards alkali, alkaline each and some transition metal ions in pure single ion solutions and mixtures was studied. A high capacity and selectivity for potassium and lead makes it promising for certain types of waste treatment and selected analytical separations.
author list (cited authors)
Bortun, A. I., Bortun, L. N., & Clearfield, A.