H⁺Cu²⁺ Ion Exchange
on a Cu⁰KU-23 Sulfocation Exchanger Nanocomposite
in Solutions with Various pH Values

E. V. Zolotukhina and T. A. Kravchenko

Voronezh State University, Universitetskaya pl. 1, Voronezh, 394893 Russia

e-mail: krav@chem.vsu.ru

Received March 26, 2008

Abstract—The influence of solution pH on H⁺Cu²⁺ exchange equilibrium was studied for the disperse cop-
per–KU-23 (15/100 S) macroporous strongly acid sulfocation exchanger nanocomposite. In dilute solutions of
copper(II) sulfate in weakly acid media (pH 3–6), ion exchange limitation is related to the consumption of
hydrogen counterions and the formation of copper counterions in a side reaction between copper particles and
impurity oxygen. The concentration of hydrogen counterions in the nanocomposite is replenished as pH
decreases because of their sorption from solution together with copper ions.

DOI: 10.1134/S0036024409050227

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