FEATURES OF EXTRACTION OF LUTETIUM AND SCANDIUM IONS BY THE INTERPOLYMER SYSTEMS LEWATIT CNP LF-AB-17-8

Abstract

Introduction. Interpolymer systems based on ion exchange resins Lewatit CNP LF and
AB-17-8 were used to separate metal ions from sample solutions containing lutetium and scandium. The
research aims to achieve maximum absorption of lutetium and scandium ions by using the remote
interaction effect of macromolecular polymers. Methodology. Jenway-6305 spectrophotometer (SK) was
used to determine the residual concentration of metal ions in the solution. The obtained results show that
individual polymers Lewatit (6:0) and AB-17-8 (0:6) do not have a higher absorption of lutetium ions
(24.96% and 21.13%, respectively) rather than interpolymer systems. The maximum degree of extraction
of lutetium ions is observed at a ratio of 4:2. The maximum values of the degree of absorption of
scandium ions are observed at ratios of 5:1 and 1:5. As a result of the conducted studies, it was found that
with an increase in the amount of one polymer in the interpolymer pair, the degree of binding of the
second polymer to the metal ion increases. The Lewatit CNP LF cation exchanger has a binding degree of
2.99 mg/mol in a ratio of 6:0, and with an increase in the amount of anion exchanger AB-17-8 by 5 times,
the binding degree of the cation exchanger in a ratio of 1:5 has increased to 13.84 mg/mol. The binding
degree of AB-17-8 in the ratio of 0:6 increased from 2.03 mg/mol to 12.20 mg/mol with a ratio of
interpolymer systems of 5:1. The degree of binding of the cation exchanger with the lutetium ion
increased by 4.5 times, and the degree of binding of the anion exchanger increased by 6 times.
Conclusion. The results obtained show the possibility of using interpolymer systems for the extraction of
lutetium and scandium ions from industrial aqueous solutions.