Modification of alpha-Zirconium Phosphate Synthesis - Effects of Crystallinity and Acidity on Eu(III) and Am(III) Ion Exchange

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Wiikinkoski , E W , Xu , J , Zhang , W , Hietala , S & Koivula , R T 2018 , ' Modification of alpha-Zirconium Phosphate Synthesis - Effects of Crystallinity and Acidity on Eu(III) and Am(III) Ion Exchange ' , ChemistrySelect , vol. 3 , no. 33 , pp. 9583-9588 . https://doi.org/10.1002/slct.201801601

Title: Modification of alpha-Zirconium Phosphate Synthesis - Effects of Crystallinity and Acidity on Eu(III) and Am(III) Ion Exchange
Author: Wiikinkoski, Elmo W.; Xu, Junhua; Zhang, Wenzhong; Hietala, Sami; Koivula, Risto T.
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
Date: 2018-09-07
Language: eng
Number of pages: 6
Belongs to series: ChemistrySelect
ISSN: 2365-6549
URI: http://hdl.handle.net/10138/322248
Abstract: The aim of an ongoing study is to develop ion exchange materials to be used in low pH in mineral acids for the uptake and separation of trivalent lanthanides and actinides. We present material development of alpha-zirconium phosphate (ZrP), namely the effects of its crystallinity and acidity on other material properties and on Eu(III) and Am(III) trace ion exchange. One-pot synthesis for three ZrP products having a time for (re)crystallization of 1 hour, 5 hours and 25 hours, is reported. Characterization techniques include X-ray diffraction, solid-state nuclear magnetic resonance, infrared spectroscopy, thermal analysis, electron microscopy, pK(a1) determination, and Eu-152(III) and Am-241(III) ion exchange studies, i.e. distribution-, selectivity- and metal binding coefficient determinations. As crystallinity and crystallite size increase, so do Eu(III) and Am(III) metal binding coefficients. The acidity and Eu(III) and Am(III) distribution- and selectivity coefficients increase in the reverse order. Findings are discussed with separation in mind. Promising separation factors (Eu:Am) of up to 90 were achieved in pH less than 1 in nitric acid.
Subject: Actinides
Inorganic synthesis
Ion exchange
Lanthanides
Zirconium phosphate
MECHANICAL-PROPERTIES
SEPARATION
CONDUCTIVITY
AMERICIUM
CHEMISTRY
MEMBRANES
SYSTEM
116 Chemical sciences
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