THE SORPTION OF NON-FERROUS METAL-IONS BY CHELATING RESINS
Journal Title: Nature & Science - Year 2024, Vol 6, Issue 3
Abstract
Abstract Conditions of sorption equilibrium of copper, zinc, cadmium and lead-ions by chelatforming resins Amberlite IRC-748 and Duolite C 467 depending on the degree of neutralization of their ionogenic groups, the acidity of the medium and concentration of solutions were studied. Sorption isotherms were established, Langmuir and Freundlich models were proposed. In all cases, the selectivity is governed by the enthalpy factor with heat release and entropy reduction. . Changing the experimental conditions (without interruption and with interruption) significantly affects the rate of ion sorption by the studied ion exchangers. This allows us to conclude that internal diffusion plays a significant role in the processes under study. Thermodynamic of these processes is considered at ideal ionite phase - the activity coefficients of absorbed ions in a solid phase haven't been taken into account. The calculated values of the diffusion coefficient, activation energy, activation entropy, enthalpy, free energy and entropy multiplier of all studied processes are given.
Authors and Affiliations
Mahnur Jafarli, Huseyn Imanov
Keywords
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