KINETICS AND MECHANISM OF SORPTION OF COPPER (II) IONS BY ION EXCHANGER
Ключевые слова:
kinetics, sorption, copper (II) ions, photometry, diffusion, mechanism.Аннотация
In this article the kinetics of the process of sorption of copper (II) ions from aqueous solutions by
polymer sulfonic cation exchanger, an elementary unit containing a heterocycle and a sulfonic group, under static
conditions at a temperature of 298 K and a copper concentration of 2 mmol / mg is investigated. The sulfonic cation
exchanger was preliminarily obtained by the reaction of polycondensation of diphenyl oxide and furfural with further
sulfonation to obtain functional ionogenic groups in order to increase the extraction efficiency. The obtained kinetic
curves of the dependence of the degree of extraction of copper ions from solution on time were processed using the
Boyd, Adamson, and Myers equation, which describes diffusion in a limited volume of solution. The kinetic
parameters of the sorption process (effective diffusion coefficient, etc.) are calculated, and the results obtained are
compared with the data for the traditionally used industrial cation exchanger, which is a copolymer of styrene and
divinyl benzene. It has been established that the process of sorption of copper (II) ions in the sulfonic cation
exchanger phase is of an intra diffusion nature and corresponds to second-order kinetic equations.
