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THE RESEARCH OF ACID-BASE AND SORPTION PROPERTIES OF MODIFIED KU-2-8 CATIONITE

sorption, complexation, heavy metal ions, potentiometric titration

Authors

In this article, the presence of functional groups introduced into the standard KU-2-8 cation exchanger as a result of chemical
modification is characterized by IR spectroscopy and potentiometric titration. When determining the acid-base properties of the
cation exchanger, the pKa distribution indices of ionizable acid sites were calculated according to the Henderson-Hesselbach
equation. The sorption properties of Cu(II) ions modified by the cation-exchange polymer KU-2-8-Ti(OH)3 have been studied. It
has been established that under dynamic conditions, 100 ml of the modified KU-2-8 cation exchanger completely sorbs 2480 ml
of copper ions from a 0.1 N solution of copper sulfate.