FEATURES OF THE SCANDIUM IONS INTERACTION WITH THE INTERPOLYMER SYSTEM LEWATIT CNP LF (H+ ) - AB-17-8 (OH- ) SYSTEM

Abstract

Introduction. The sorption of the interpolymer systems on the basis on Lewatit CNP LF
and AB-17-8 industrial ion exchanges in the relation to scandium ions has been studied. The purpose of
this research has been to study the sorption capacity of the interpolymer system “Lewatit CNP LF:AV-17-
8” in relation to scandium ions. Methodology. To calculate the sorption parameters, the optical density of
the solutions has been measured on the Jenway-6305 spectrophotometer. The obtained results have shown
that the maximum sorption degree of the “Lewatit CNP LF:AV-17-8” interpolymer systems during 48 h
of interaction has occurred in the molar ratios (3:3, 2:4 and 1:5) of polymers, the sorption degrees have
been 26.4%; 27.9% and 26%, respectively. As can be seen, the value of the sorption degree is maximum
at the ratio of 2:4. The value of the sorption degree in this ratio is higher by 32.5% and 28.5%,
respectively, as compared with the degree of sorption of individual ion exchangers Lewatit CNP LF (6:0)
and AV-17-8 (0:6).The highest values of the polymer chain binding degree after 48 h with scandium ions
in the interpolymer system “Lewatit CNP LF:AV-17-8” for the ratios of 3:3; 2:4 and 1:5 have been
4.87%, 5.25% and 5.01%, respectively. The values of the polymer chain binding degree of the individual
Lewatit CNPLF (6:0) and AV-17-8 (0:6) ion exchangers, after 48 h have been 3.68% and 4.26%,
respectively. Conclusion. The obtained results have shown that the mutual activation of ion exchange
resin the interpolymer system leads to a significant increase in their sorption capacity.