Pragmatic Approach to the Removal of Cu(II)ions from Aqueous Solution using Silica: A Kinetic, Isothermal and Thermodynamic Study
Kenneth O. Amanze, Janet O. Amanze, Glory Okore, Lynda C. Ngozi-Olehi, Okeke Pamela I., Rosemary I. Uchegbu, Appolinus I. C. Ehirim, Gabriel C. Eze
Journal of Materials Science Research and Reviews · pp. 396–406 · Published 14 May 2025
10.9734/jmsrr/2025/v8i2413Abstract
The main objective of this study was to investigate the removal of copper(II) ions [Cu (ii)] from aqueous solution by adsorption unto pure silica. The silica was characterized by using Fourier Transform Infra-Red (FT-IR) spectral analysis before and after adsorption of the metal ions. The optimum condition for the adsorption of Cu(II)ions was studied in a batch system by considering the extent of adsorption with respect to pH, contact time, initial copper(II) ion concentration and temperature. Maximum adsorption was recorded at a pH of 7.0 and equilibrium sorption was achieved within 50 minutes of the process. It was observed that the optimum amount of Cu(II)ions absorbed by pure silica was 91.3 mg/g representing 98.86 % at the optimum pH of 7.0. Three kinetic models: Elovich, Pseudo first-order and Pseudo second-order were applied in the analyses. Desorption studies showed that about 24.0 % of the metal ion was desorbed with appropriate eluting agents. The experimental results showed that pure silica is a good adsorbent for the removal of Cu(II)ions from aqueous solutions and may possibly be useful for treating industrial waste waters.
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