Оrganic-inorganic ion-exchanger containing zirconium hydrophosphate for removal of uranium(VI) compounds from aqueous solutions

Authors

  • Yu. S. Dzyazko Vernadsky Institute of general and inorganic chemistry of National Academy of Sciences of Ukraine
  • N. A. Perlova Меchnikov Odessa National University
  • O. V. Perlova Меchnikov Odessa National University
  • V. F. Sazonova Меchnikov Odessa National University
  • L. N. Ponomareva Vernadsky Institute of general and inorganic chemistry of National Academy of Sciences of Ukraine
  • Yu. M. Volfkovich Frumkin Institute of Physical Chemistry and Electrochemistry
  • A. V. Palchik Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine
  • V. V. Trachevsky Kurdyumov Institute of Metallophysics of National Academy of Sciences of Ukraine
  • V. N. Belyakov Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine

DOI:

https://doi.org/10.15407/hftp07.02.119

Keywords:

organic-inorganic ion exchanger, aggregates of nanoparticles, standard contact porosimetry, zirconium hydrophosphate, U(VI) compounds

Abstract

In order to obtain organic-inorganic ion-exchanger, a method has been proposed involving reorganization of n gel-like cation exchange matrix in non-aqueous media followed by zirconium hydrophosphate precipitation. Reorganization, which is confirmed with methods of standard contact porosimetry and NMR 23Na spectroscopy, means a narrowing of transport pores of the polymer. As a result of precipitation in the reorganized matrix, aggregates of zirconium hydrophosphate nanoparticles are formed. Scanning electron microscopy has shown the size of these formations to be of 200 nm in diameter. It has been found with a method of X-ray fluorescence analysis, a molar ratio of Zr:P in the inorganic constituent is 1:0.31. The regularities of precipitation are considered from the point of view of Ostwald-Freundlich and Volfkovich equations. inorganic method with a low content of phosphorus. Small size of the incorporated particles provides high rate of removal of U(VI) cationic compounds from individual aqueous solution containing also HCl (pH 2.5). The regime of sorption is mixed-diffusion, the coefficients of U(VI) ? H+ exchange for particle diffusion are 5.45?10–12 (composite), 3.86?10–12 (unmodified resin), 4.75?10–14 (individual zirconium hydrophosphate) m2s–1. In the case of sorption from the solution containing also Fe(III), U(VI) sorption is complicated with a chemical reaction of the pseudo-second order. In opposite to unmodified resin, the composite removes U(VI) compounds in a wide range of the solution pH (2–10).

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How to Cite

(1)
Dzyazko, Y. S.; Perlova, N. A.; Perlova, O. V.; Sazonova, V. F.; Ponomareva, L. N.; Volfkovich, Y. M.; Palchik, A. V.; Trachevsky, V. V.; Belyakov, V. N. Оrganic-Inorganic Ion-Exchanger Containing Zirconium Hydrophosphate for Removal of uranium(VI) Compounds from Aqueous Solutions. Him. Fiz. Tehnol. Poverhni 2016, 7, 119-132.

Issue

Vol. 7 No. 2 (2016): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

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Articles

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