https://doi.org/10.36719/2707-1146/52/21-25
Gunel Mammadova
Institute of Radiation Problems of the Ministry of Science and Education
Ph. D. candidate
https://orcid.org/0009-0006-6460-098X
Adsorption Study of Fe (III) Ions By Cellulose/Fe₃O₄/Sio₂/4-Aminoantipyrine
Abstract
A magnetic sorbent was synthesized by modifying the cellulose/Fe₃O₄/SiO₂ nanocomposite with 4-aminoantipyrine. The sorption of iron (III) ions with the synthesized sorbent was studied under static conditions. It was found that the extraction of Fe(III) ions was maximal at pH = 4.0. The study of the sorption of iron (III) ions over time showed that complete sorption occurs within 2 hours under static conditions. The ionic strength of the solution up to 1.2 M does not affect the sorption of iron (III) ions. The results showed that a significant decrease in sorption occurs in solutions with ionic strength higher than 1.2 M, and as the concentration of iron (III) in the solution increases, the amount of sorbed metal increases, with the maximum observed at a concentration of 7.0∙10⁻³ mol/L. The sorption capacity of the sorbent is 384 mg/g. In the final stage, desorption of mineral acids (HCl, H₂SO₄, HClO₄, HNO₃) with different concentrations was performed. It was established that iron (III) ions are maximally extracted from the sorbent when using 1.0 M HClO₄, with a desorption degree of 96 %.
Keywords: iron (III) ion, magnetic sorbent, sorption, ionic strength, desorption