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Cysteine-coated Magnetite Nanoparticles for the Removal of Carmoisine Edible Dye from Aqueous Medium
- Source: Combinatorial Chemistry & High Throughput Screening, Volume 27, Issue 19, Dec 2024, p. 2861 - 2870
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- 27 Apr 2023
- 15 Sep 2023
- 01 Dec 2024
Abstract
In this study, cysteine-coated magnetite nanoparticles (Fe3O4@Cys MNPs) were synthesized by chemical method and applied as a recoverable and efficient adsorbent for the removal of carmoisine dye from aqueous solutions. The synthesized MNPs were characterized by FT-IR, XRD, SEM, and TEM studies.
The effect of various experimental parameters on the dye removal efficiency was studied using Taguchi orthogonal array design (L16 array). Under the optimum conditions (pH = 2, stirring time = 30 min, adsorbent amount = 0.1 g and without salt addition), more than 92% of carmoisine was removed from the aqueous solutions.
The kinetic studies showed rapid adsorption dynamics by a pseudo second-order kinetic model, confirming that diffusion controls the adsorption process. Dye adsorption equilibrium data were fitted well to the Freundlich isotherm, and the synthesized adsorbent showed high removal efficiency.
The obtained results showed that the synthesized MNPs act as a reusable adsorbent for carmoisine removal with an easy procedure.