Ion Exchange Properties of α-Zirconium Phosphate Modified by a Process of Intercalation/De-Intercalation with Monoamines
Colloidal dispersions of delaminated zirconium phosphate, obtained as a result of intercalation of some amines, have been sonicated and then put under a spray-drying or freeze-drying treatment. Highly dispersed and hydrated powders of zirconium phosphate have been obtained. The water content of these new phases ranges from 1.2 to 3.5 mol/mol of Zr, as the relative humidity rises from 5 to 90%, correspondingly the interlayer distance changes from 8.0 to 10.5 A. The ion exchange properties of polyhydrated zirconium phosphates towards Na+, K+, Cs+ and Ba2+ cations have been investigated and compared with those of α-Zr(HPO4)2.H2O. Owing to the large interlayer distance, these polyhydrated phases exhibit good ion exchange and intercalation properties expecially towards large cationic or neutral species.
KeywordsMethylene Blue Colloidal Dispersion Interlayer Distance Zirconium Phosphate Phosphate Powder
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- 1.A. Clearfield (Ed.), Inorganic Ion Exchange Materials, CRC Press, FL U.S.A., 1982 see Chapters 1–3.Google Scholar
- 5.U. Costantino, J. Chem. Soc. Dalton Trans., 402 (1979).Google Scholar
- 12.G. Alberti, M.G. Bernasconi, M. Casciola and U. Costantino, Ann. Chim. (Rome), 68, 265 (1978).Google Scholar
- 13.I.A.E.A. — Inorganic Ion Exchangers and Adsorbents for Chemical Processing in the Nuclear Fuel Cycle, Tecdoc-337, Vienna, 1985.Google Scholar