Abstract
The research is aimed at checking the impact of a remote interaction phenomenon on growth of sorption properties of ion-exchange resins during sorption of europium ions. Industrial ion exchangers Amberlite IR120 and AB-17-8 were selected as objects for the study. Investigation was undertaken using the following physico-chemical methods of analysis: conductometry, pH-metry, colorimetry, Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and atomic emission spectroscopy. Remote interaction of the initial ion exchangers in the interpolymer system leads to their transition into highly ionized state due to formation of optimal conformation. Found that high ionization areas of Amberlite IR120 and AB-17-8 are the molar ratios Amberlite IR120:AB-17-8 = 4:2 and 1:5. The remote interaction effect provides significant increase of the following sorption properties: sorption degree, polymer chain binding degree, effective dynamic exchange capacity. A strong increase of the sorption properties (average increase for all time of remote interaction is over 50%) in the interpolymer system Amberlite IR120-AB-17-8 was observed with individual polymer structures of Amberlite IR120 and AB-17-8. The remote interaction phenomenon can be successfully used for effective modification of industrial ion exchangers for sorption of rare-earth metals.
Highlights
Nowadays, prices of rare-earth metals have significantly increased due to high demand
The remote interaction phenomenon [29–32] provides a transition of initial macromolecular structures into highly ionized state due to their mutual activation
Remote interaction destroys intermolecular interchain bonds stabilized by hydrophobic fragments of divinylbenzene, which results in additional dissociation of functional groups, which are stabilized by hydrophobic fragments of divinylbenzene
Summary
Prices of rare-earth metals have significantly increased due to high demand. The global rare-earth metals (REM) market is estimated at a modest $13 billion, according to USA economics. China accounts for about 36.7% of the world’s known reserves of REM and over 70% of the world’s production of these metals [1]. 17 elements that occupy the bottom of the periodic table (scandium, lutetium, thulium, etc.), the entire American high-tech industry with a turnover of trillions of dollars can stand [2]. The problem is not that some REM are really that rare in nature. They are mined much more than precious metals. REM are obtained mainly along the way and are “brought” into laboratories using sophisticated technologies.
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