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- W2614782918 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 23 Na 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) m 2 s –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)." @default.
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- W2614782918 date "2016-06-30" @default.
- W2614782918 modified "2023-09-27" @default.
- W2614782918 title "Оrganic-inorganic ion-exchanger containing zirconium hydrophosphate for removal of uranium(VI) compounds from aqueous solutions" @default.
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- W2614782918 doi "https://doi.org/10.15407/hftp07.02.119" @default.
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